Skyrc Ultimate Duo Instruction Manual

Instruction Manual

[Version 1.0]

BALANCE CHARGER / DISCHARGER / POWER SUPPLY

Table of Contents

This appliance is not intended for use by persons (including children) with
reduced physical, sensory or mental capabilities, or lack of experience
and knowledge, unless they have been given supervision or instruction
concerning use of the appliance by a person responsible for their safety.
Children should be supervised to ensure that they do not play with the
appliance.
Do not recharge non-rechargeable batteries!

WARNING:

01

03

04

07

10

11

12

14

16

19

23

25

26

28

30

31

32

33

34

35

36

Introduction

SetContains

Special Features

Warning and Safety Notes

Program Flow Chart

Operation

Power and Battery Connection

Operating Program

Lithium Battery Program (LiPo/LiFe/Lilon/LiHV)

NiMH/NiCd Battery Program

Pb Lead-Acid Battery Program

DC Power Supply

Battery Memory Set and Call Out

System Setting

Battery Voltage Meter

Battery Resistance Meter

Warning and Error Message

Specification

Conformity Declaration

Commonly Used Terms

Warranty and Service

Introduction

01 ·

D250

Thanks for your choice of SKYRC Ultimate Duo 250W AC/DC Balance Charger /
Discharger / Power Supply. This unit is simple to use, but the operation of a
sophisticated automatic charger such as SKYRC D250 does require some
knowledge on the part of the user. These operating instructions are designed to
ensure that you quickly become familiar with its functions. It is therefore important
that you read right through the Operating Instructions, Warning and Safety Notes
before you attempt to use your new charger for the first time. We hope you have
many years of pleasure and success with your new battery charger.

SKYRC D250 is a high-performance, micro processor control charge/ discharge
station with battery management suitable for use with all current battery types, with
integral equalizer six-cell Lithium-Polymer (LiPo), Lithium iron phosphate (LiFe) and
Lithium-Ion (LiIon) batteries; maximum 10A charge current.

The additional LiHV mode is able to charge the new generation of LiPo batteries
with an end of charge voltage 4.35V. There are Automatic Charging Current Limit,
Capacity Limit, Temperature Threshold and Processing Time Limit which makes the
charger safe to use.

D250 is a twin-channel charger with two independent circuits which can charge two
different kinds of batteries simultaneously. It also supports power distribution in AC
mode to get max charging power to shorten charging time, the synchronization
mode is available, in which users could perform synchronous settings for charging
same batteries simultaneously to offer time-saving benefits. Besides that, voice
guide is available, which will allow users to enjoy more fun during the using.

Your Ultimate Duo 250W can supply maximum 150 Watts DC power. You can use it
to power equipments that require DC power. It converts standard household power
100-240V AC to 13.8V DC power.

Please BE SURE to read these INSTRUCTIONS, WARNING and SAFETY NOTES
before you use the charger for the first time.

It can be dangerous to mis-handle batteries and battery chargers, as there is
always a risk of batteries catching fire and exploding.

Introduction

· 02

D250

Please read this entire operating manual completely and attentively before using
this product, as it covers a wide range of information on operating and safety. Or
please do use this product in company with a specialist!

Output Socket 4mm Banana Plug

Balance Lead Socket

USB Port

Temperature Sensor Port

Output Socket
4mm Banana
Plug

Balance Lead Socket

Temperature Sensor Port

LCD Display

Cooling Fan

Power
Switch

AC Socket
100-240V

Resume or Start
Charge Processes

Scroll Through the
Main Menu Stop Any
Charge Processes

Alter Values
See the Status of Individual
Cells in Balance Charge Mode

DC Input 11-18V
DC Output 13.8V

DC Output Power
Level Indicator

Micro USB Port
for PC Link

03 ·

D250

The Set Contains

THESETCONTAINS

3

5

2

4

1

1. SKYRC Ultimate Duo 250W

2. XH Adaptor X 2

3. Charging Cable X 2

4. Banana connectors with XT60 connector Charging Cable X 2

5. Power Cord

6. DC Input/Output Cable

7. Power Distribution

6

7

· 04

D250

Twin-channel Charger

SKYRC D250 allows you to plug 2 batteries into one charger simultaneously, and it will
intelligently and automatically charge 2 battries at once to their maximum capacity. To top
of it, the batteries being charged do not even need to have the same configuration. You
can connect different chemistry(NiMH/NiCd/LiPo/LiFe/Lilon/LiHV/Pb)batteries into any of
the charging ports.

DC Power Output and Power Distribution

Optimized Operating Software

SKYRC D250 features the so-called AUTO function that set the feeding current during the
process of charging or discharging. Especially for lithium batteries, it can prevent the
overcharging which may lead to an explosion due to the user's fault. It can disconnect the
circuit automatically and alarm once detecting any malfunction. All the programs of this
product were controlled through two way linkage and communication, to achieve the
maximum safety and minimize the trouble. All the settings can be configured by users!

Special Features

ENTER

STATUS

BATT/
PROG

ENTERSTATUS

BATT/
PROG

Besides charging batteries, your Ultimate Duo 250W can supply 150 Watts DC Power.
You can use it to power equipments that require DC power. It converts standard
household power 100-240V AC to 13.8V DC power.
Power distribution is supported. For example, if you set output power for Channel 1 to
50W and Channel 2 to 100W, DC power output will be 100W automatically, total power is
250W.

05 ·

D250

Special Features

Internal Independent Lithium Battery Balancer

SKYRC D250 employs an individual-cell-voltage balancer. It isn't necessary to connect an
external balancer for balance charging.

Balancing Individual Cells Battery Discharging

During the process of discharging, SKYRC D250 can monitor and balance each cell of
the battery individually. Error message will be indicated and the process will be ended
automatically if the voltage of any single one cell is abnormal.

Adaptable to Various Type of Lithium Battery

SKYRC D250 is adaptable to various types of lithium batteries, such as LiPo, LiIon and
the new LiFe series of batteries.

LiHV Mode Available

The additional LiHV mode is able to charge the new generation of LiPo batteries with an
end of charge voltage 4.35 V.

Battery Memory (Data Store/Load)

The charger can store up to 10 different charge/discharge profiles for each channel. You
can keep the data pertaining to program setting of the battery of continuous charging or
discharging. Users can call out these data at any time without any special program
setting.

Terminal Voltage Control(TVC)

The charger allows user to change the end voltage. (for expert user only)

Fast and Storage Mode of Lithium Battery

Purposes to charge lithium battery varies, 'fast' charge reduce the duration of charging,
whereas 'store' state can control the final voltage of your battery, so as to store for a long
time and protect useful time of the battery.

Re-Peak Mode of NiMH/NiCd Battery

In re-peak charge mode, the charger can peak charge the battery once, twice or three
times in a row automatically. This is good for making certain the battery is fully charged.

Delta-peak Sensitivity for NiMH/NiCd

Delta-peak sensitivity for NiMH/NiCd battery: The automatic charge termination program
based on the principle of the Delta-peak voltage detection. When the battery's voltage
exceeds the threshold, the process will be terminated automatically.

· 06

D250

Automatic Charging Current Limit

You can set up the upper limit of the charging current when charging your NiMH or NiCd
battery, it is useful for the NiMH battery of low impedance and capacity in the 'AUTO'
charging mode.

Capacity Limit

The charging capacity is always calculated as the charging current multiplied by time. If
the charging capacity exceeds the limit, the process will be terminated automatically
when you set the maximum value.

Temperature Threshold*

The battery's internal chemical reaction will cause the temperature of the battery to rise.
If the temperature limit is reached, the process will be terminated.

This function is available by connecting optional temperature probe, which is not included in the package.

*

Processing Time Limit:

You can also limit the maximum process time to avoid any possible defect.

Battery Internal Resistance Meter

The user can check battery's total internal resistance and each cell's internal resistance.

LiPo Battery Voltage Meter

The user can check battery's total voltage, the highest voltage, the lowest voltage and
each cell's voltage.

Special Features

Cyclic Charging/Discharging

1 to 5 cyclic and continuous process of charge > discharge or discharge > charge is
operable for battery refreshing and balancing to stimulate the battery's activity.

07 ·

D250

These warnings and safety notes are particularly important. Please follow the
instructions for maximum safety; otherwise the charger and the battery can be
damaged or at worst it can cause a fire.

Never leave the charger unattended when it is connected to its power supply. If any
malfunction is found, TERMINATE THE PROCESS AT ONCE and refer to the
operation manual.

Keep the charger well away from dust, damp, rain, heat, direct sunshine and vibration.
Never drop it.

The allowable DC input voltage is 11~18V DC, and charge power 250W for 2 channels.

This charger and the battery should be put on a heat-resistant, noninflammable and
nonconductive surface. Never place them on a car seat, carpet or similar. Keep all
the inflammable volatile materials away from operating area.

Make sure you know the specifications of the battery to be charged or discharged to
ensure it meets the requirements of this charger. If the program is set up incorrectly,
the battery and charger may be damaged .It can cause fire or explosion due to
overcharging.

Be very careful to choose the correct voltage for different types of battery otherwise you
may cause damage to the batteries. Incorrect settings could cause the cells to fire or
explode.

Warning and Safety Notes

The allowable AC input voltage is 100~240V AC, and charge power 250W for 2 channels
and power supply.

Standard Battery Parameters

3.7V/cell

Nominal
Voltage

Min. Discharge
Voltage

Max Charge
Voltage

Storage
Voltage

Allowable
Fast Charge

3.7V/cell

4.2V/cell

3.8V/cell

≦1C

LiPo

LiIon

3.6V/cell

4.1V/cell

≦1C

3.3V/cell

3.6V/cell

3.3V/cell

≦4C

LiFe

3.0-3.3V/cell 2.9-3.2V/cell

2.6-2.9V/cell

1.2V/cell

1.5V/cell

n/a

1C-2C

NiCd

1.2V/cell

1.5V/cell

n/a

1C-2C

NiMH

2.0V/cell

2.46V/cell

n/a

≦0.4C

Pb

0.1-1.1V/cell 0.1-1.1V/cell

1.8V/cell

LiHV

3.7V/cell

4.35V/cell

3.85V/cell

≦1C

3.1-3.4V/cell

· 08

D250

A battery pack which consists of different types of cells (including different
manufacturers)
A battery that is already fully charged or just slightly discharged.
Non-rechargeable batteries (Explosion hazard).
Batteries that require a different charge technique from NiCd, NiMh, LiPo or Gel cell
(Pb, Lead acid).
A faulty or damaged battery.
A battery fitted with an integral charge circuit or a protection circuit.
Batteries installed in a device or which are electrically linked to other components.
Batteries that are not expressly stated by the manufacturer to be suitable for the
currents the charger delivers during the charge process.

Please bear in mind the following points before commencing charging:

Did you select the appropriate program suitable for the type of battery you are
charging?
Did you set up adequate current for charging or discharging?
Have you checked the battery voltage? Lithium battery packs can be wired in parallel
and in series, i.e. a 2 cell pack can be 3.7V (in parallel) or 7.4V (in series).
Have you checked that all connections are firm and secure?
Make sure there are no intermittent contacts at any point in the circuit.

Charging

During charge process, a specific quantity of electrical energy is fed into the battery.
The charge quantity is calculated by multiplying charge current by charge time. The
maximum permissible charge current varies depending on the battery type or its
performance, and can be found in the information by the battery manufacturer. Only
batteries that are expressly stated to be capable of quick-charge are allowed to be
charged at rates higher than the standard charge current.

Connect the battery to the terminal of the charger: red is positive and black is
negative. Due to the difference between resistance of cable and connector, the
charger can not detect resistance of the battery pack, the essential requirement
for the charger to work properly is that the charge lead should be of adequate
conductor cross-section, and high quality connectors which are normally gold­plated should be fitted to both ends.

Always refer to the manual by battery manufacturer about charging methods,
recommended charging current and charging time. Especially, the lithium battery
should be charged according the charging instruction provided by the manufacturer
strictly.

Never attempt to charge or discharge the following types of batteries.

Warning and Safety Notes

09 ·

D250

Discharging

The main purpose of discharging is to clean residual capacity of the battery, or to
reduce the battery voltage to a defined level. The same attention should be paid to
the discharging process as charging. The final discharge voltage should be set up
correctly to avoid deep-discharging. Lithium battery can not be discharged to lower
than the minimum voltage, or it will cause a rapid loss of capacity or a total failure.
Generally, lithium battery doesn't need to be discharged. Please pay attention to the
minimum voltage of lithium battery to protect the battery.

Some rechargeable batteries have a memory effect. If they are partly used and
recharged before the whole charge is accomplished, they remember this and will only
use that part of their capacity next time. This is a memory effect. It is said that NiCd
and NiMH batteries are suffering from memory effect. NiCd has more memory effect
than NiMH.

Attention should be paid to the connection of lithium battery especially.

Do not attempt to disassemble the battery pack arbitrarily.

Please get highlighted that lithium battery packs can be wired in parallel and in series.
In the parallel connection, the battery s capacity is calculated by multiplying single
battery capacity by the number of cells with total voltage stay the same. The voltages
imbalance may cause fire or explosion .Lithium battery is recommended to charge in
series.

Warning and Safety Notes

· 10

D250

Program Flow Chart

Note: The flow chart is taking one channel for example as the flow chart for the two channels (Channel 1 and
Channel 2) are identical.

BATT/PROGRAM

Pb BATT

ENTER

Pb CHARGE

2.0A 2.0V (1P)

Pb DISCHARGE

0.1A 2.0V (1P)

BATT/PROGRAM

NiCd BATT

NiCd CHARGE
CURRENT 2.0A

ENTER

NiCd DISCHARGE

0.1A CUT: 1.0V

NiCd CYCLE
CHG>DCHG  1

BATT/PROGRAM

NiMH BATT

ENTER

NiMH CHARGE
CURRENT 2.0A

NiMH DISCHARGE

0.1A CUT: 1.0V

NiMH CYCLE
CHG>DCHG 1

BATT/PROGRAM
LiPo BATT

LiPo BALANCE

2.0A 7.4V (2S)

LiPo CHARGE

2.0A 7.4V (2S)

LiPo FAST CHG

2.0A 7.4V (2S)

LiPo STORAGE

2.0A 7.4V (2S)

LiPo DISCHARGE

2.0A 7.4V (2S)

ENTER

BATT/PROGRAM
LiFe BATT

Lilo BALANCE

2.0A 7.2V (2S)

Lilo CHARGE

2.0A 7.2V (2S)

Lilo FAST CHG

2.0A 7.2V (2S)

Lilo STORAGE

2.0A 7.2V (2S)

Lilo DISCHARGE

2.0A 7.2V (2S)

ENTER

BATT/PROGRAM
LiIo BATT

LiFe BALANCE

2.0A 6.6V (2S)

LiFe CHARGE

2.0A 6.6V (2S)

LiFe FAST CHG

2.0A 6.6V (2S)

LiFe STORAGE

2.0A 6.6V (2S)

LiFe DISCHARGE

2.0A 6.6V (2S)

ENTER

NiCd RE-PEAK
1

NiMH RE-PEAK
1

NiMH Auto CHARGE
CURRENT 2.0A

NiCd Auto CHARGE
CURRENT 2.0A

LiHV BALANCE

2.0A 7.6V (2S)

LiHV CHARGE

2.0A 7.6V (2S)

LiHV FAST CHG

2.0A 7.6V (2S)

LiHV STORAGE

2.0A 7.6V (2S)

LiHV DISCHARGE

2.0A 7.6V (2S)

BATT/PROGRAM
LiHV BATT

ENTER

BATT/PROGRAM

BATT METER

3.99 4.00 3.99 V

0.00 0.00 0.00 V

MAIN 11.98V
H4.003V L3.986V

BATT/PROGRAM
BATT MEMORY

ENTER

[ BATT MEMORY 1 ]
ENTER SET->

ENTER

BATT TYPE
LiPo

BATT VOLTAGE

7.4V ( 2S )

CHARGE CURRENT

4.9A

DISCHG CURRENT

2.2A

DISCHG VOLTAGE

3.0V/CELL

TVC=YOUR RISK

4.20V

ENTER

ENTER

BATT/PROGRAM
SYSTEM SETTING->

ENTER

Stop

Batt/
Type

SAVE PROGRAM
ENTER

SAVE PROGRAM
SAVE….

[ BATT MEMORY 1 ]
LiPo 7.4V (2S )

[ BATT MEMORY 1 ]
C:4.9A D:2.2A

ENTER CHARGER
LOAD……

LiPo BALANCE CHG

4.9A 7.4V(2S)

LiPo CHARGE

4.9A 7.4V(2S)

LiPo FAST CHARGE

4.9A 7.4V(2S)

LiPo STORAGE

4.9A 7.4V(2S)

LiPo DISCHARGE

2.2A 7.4V(2S)

BATT TYPE
NiMH

BATT VOLTAGE

2.4V (2S)

ENTER

CHARGE CURRENT

3.3A

TRICKLE
100mA

PEAK DELAY
1Min

DISCHG CURRENT

2.2A

DISCHG VOLTAGE

1.1V/CELL

SAVE PROGRAM

ENTER

ENTER

BATT TYPE
Pb

BATT VOLTAGE

4.0V (2P)

CHARGE CURRENT

3.3A

DSCH CURRENT

1.5A

DSCH VOLTAGE

1.7V/CELL

SAVE PROGRAM

ENTER

BATT/PROGRAM
BATT RESISTANCE

ENTER

5 3 3 mΩ
0 0 0 mΩ

TATAL: 11mΩ

ENTER

ENTER>3Seconds

SAVE PROGRAM
SAVE….

ENTER

[ BATT MEMORY 2 ]
NiMH 2.4V (2S )

[ BATT MEMORY 2 ]
C:1.0A D:1.0A

ENTER>3s

ENTER CHARGER
LOAD……

NiMH CHARGE
CURRENT 1.0A

NiMH Auto CHARGE
CURRENT 1.2A

NiMH DISCHARGE

1.0A CUT: 2.0V

NiMH RE-PEAK
2

NiMH CYCLE
DCHG>CHG 1

[ BATT MEMORY 2 ]
ENTER SET->

[ BATT MEMORY 3 ]
ENTER SET->

SAVE PROGRAM
SAVE….

ENTER

[ BATT MEMORY 3 ]
Pb 4.0V (2S )

[ BATT MEMORY 3 ]
C:3.3A D:1.5A

ENTER CHARGER
LOAD……

Pb CHARGE

3.3A 4.0V(2P)

Pb DISCHARGE

1.5A 4.0V(2P)

Capacity Cut-Off
ON 5000mAH

Temp Cut-Off
ON 50°C 122°F

Rest Time
CHG>DCHG 10Min

Safety Timer
ON 120Min

Synchronization
OFF

CH1: 100 CH2: 100W
DC SUPPLY: 50W

NiMH Sensitivity
D.Peak  Default

NiCd Sensitivity
D.Peak  Default

Key Beep ON
Buzzer ON

DC Input Low
CUT-OFF 11.0V

Temperature Unit
Celsius

ENTER

ENTER > 3s

Version
HW:1.00 SW: 1.10

Load Factory Set
Enter

11 ·

D250

Operation

When you are willing to alter the parameter value in the program, press the
START/ENTER button to make it blink then change the value by pressing DEC and INC
button. The value will be stored by re-pressing the START/ENTER button. If there is
another parameter can be altered in the same screen, when you confirm the first
parameter value, the next parameter value will start to blink which means it is ready to
alert.

When you are willing to start the process, press and hold the START/ENTER button for 3
seconds. When you are willing to stop the progress or go back to previous step/screen,
press the BATT PROG/STOP button once.

When you power on the charger, it will enter LiPo Battery balance program directly. You
could change the mode (balance mode, normal charge mode, fast charge mode, store
mode or discharge mode), enter the desired charging/discharging mode, set the referred
parameter and start the progress.

If you have no request for LiPo Battery program, please press the BATT PROG/STOP
button to enter BATT PROGRAM screen.

BATT PROG / STOP Button:
It is used to stop the progress or go back to previous step/screen
DEC Button:
It is used to go through the menus and decrease the parameter value
INC Button:
It is used to go through the menus and increase the parameter value
ENTER / START Button:
It is used to enter parameter or store parameter on screen, resume or start charge

processes.

· 12

D250

Power and Battery Connection

1. Connecting to power source

There are two kinds of inputs for SKYRC D250, DC 11-18V and AC 100-240V.

12V DC Battery / DC power supply connection.

AC 100-240V power source connection.

ENTER

STATUS

BATT/
PROG

ENTERSTATUS

BATT/
PROG

ENTER

STATUS

BATT/
PROG

ENTERSTATUS

BATT/
PROG

XT60

13 ·

D250

1) LiPo Battery Connection with Balance Adapter

2) NiMH/NiCd or Pb Battery Connection

TO AVOID SHORT CIRCUITS, ALWAYS CONNECT THE CHARGE LEADS
TO THE CHARGER FIRST, AND THEN TO THE BATTERY. REVERSE THE
SEQUENCE WHEN DISCONNECTING THE PACK.

WARNING!

2. Connecting the battery

Balance Socket

The balance wire attached to the battery must be connected to the charger with the
black wire aligned with the negative marking. Ensure correct polarity!

For safety reasons, the default setting for charging Lithium (LiPo, Lilo, LiFe and LiHV)
battery is using balance adaptor to connect battery and charger in Charge, Fast Charge,
Balance Charge and Storage modes. But if the battery comes with no balance wire, it will
prompt you “No balance cable detected push enter to continue” in Charge, Fast Charge
and Storage modes.

Note: We will explain the operating procedure of one channel as the procedure for
channel 1 and 2 is identical.

Power and Battery Connection

LiPo

NiMH

ENTER

STATUS

BATT/

PROG

ENTERSTATUS

BATT/

PROG

ENTER

STATUS

BATT/

PROG

ENTERSTATUS

BATT/

PROG

· 14

D250

Operating Program

Here is the detailed procedure to make the charger work. All the screens and operations
will take Li-Po BALANCE CHARGE program for example,

Note: We will explain one channel as the operating procedure
of Channel 1 and Channel 2 is identical.

1. Connection

Connecting to power source

There are two kinds of inputs for SKYRC D250, DC 11-18V and AC 100-240V.

A. Operating in AC mode

SKYRC D250 comes with built in switching power supply. You can connect the AC
power cord directly to the main AC socket. (100-240V AC).

Note: The charging power in AC mode is 250W totally for Channel 1, Channel 2 and
Power supply.

In AC mode, it supports Power Distribution. The total power for Channel 1, Channel
2 and power supply is 250W. You could set the Max Power for one channel (Take
Channel 1 for example)as following,

And the DC power supply will take the rest power automatically (For example, if you set
channel 1 as 120W and channel 2 as 50W,the power supply will be 80W).

If Channel 1 and Channel 2 are both charging, you can’t change the power
distribution.

If Channel 1 is charging, you can change power of Channel 2 and Channel 1,
the power supply will take the rest power automatically.

B. Operating in DC mode

Please connect SKYRC D250 with AC/DC power supply by supplied DC input cable. Also
you could use terminal clips with DC connectors, for attaching directly to 12V car
batteries. It is critically important that you use either a fully charged 13.8V car battery or a
high quality AC/DC power supply in the range of 11-18V DC output with minimum power
300W or higher to insure reliable performance.

1).

NOTE1:

NOTE2:

C H 1 :12 0 C H 2: 5 0 W
D C S U PPL Y : 8 0W

C H 1 :12 0 C H 2: 5 0 W
D C S U PPL Y : 8 0W

D250

15 ·

Failure to connect as shown in this diagram will damage this charger.

To avoid short circuit between the charge lead always connect the charge cable to the
charger first, then connect the battery. Reverse the sequence when disconnecting.

WARNING:

Connecting the battery

Important!!! Before connecting a battery it is absolutely essential to check one last
time that you have set the parameters correctly. If the settings are incorrect, the
battery may be damaged, and could even burst into flames or explode. To avoid
short circuits between the banana plugs, always connect the charge leads to the
charger first, and only then to the battery. Reverse the sequence when
disconnecting the pack.

Balance Socket

The balance wire attached to the battery must be connected to the charger with the
black wire aligned with the negative marking. Take care to maintain correct polarity!
(See the wiring diagram below.)
This diagram shows the correct way to connect your battery to the SKYRC D250
while charging.

2).

3).

Operating Program

It is a MUST for charging Lithium (LiPo, Lilo, LiFe and LiHV) battery in
Balance Charge mode. If you don't connect the battery to the balance socket
while the charger is working in mentioned mode, the charger won't start
working.

ENTER

STATUS

BATT/
PROG

· 16

D250

The following flowcharts show the entire programming menu. It is highly recommended to
keep these flowcharts handy while you learn how to operate this charger.
There are two main ways to program the charger.

A memory profile is available for setting and storing pertinent information for up to
40 different program sets; each channel can store 10 sets. Once a battery program
is stored into memory, it will be retained until changed again manually. Recalling a
program memory number makes the charger instantly ready to go!
If you do not wish to use the battery program memories, this charger can be
manually set before each use.

(1)

(2)

The following flowchart shows how the program is set manually:

BATT/PROGRAM

LiPo BATT

LiPo BALANCE CHG

2.0A 11.1V (3S)

LiPo BALANCE CHG

2.0A 11.1V (3S)

LiPo BALANCE CHG

2.0A 11.1V (3S)

LiPo BALANCE CHG

2.0A 11.1V (3S)

BATT/PROGRAM Select

Mode Select

Program Start

Press INC and DEC to go through all the programs and press
START/ENTER to enter LiPo BATT Program.

Battery Setting

Press INC and DEC to go through all the modes and press
START/ENTER to enter LiPo Balance Charge Mode.

Press START/ENTER, the present value will start to blink. Press
INC and DEC to change the value and press START/ENTER to
confirm your setting.
At the same time, the battery pack’s cell count will start to blink,
press INC and DEC to change the value and press START/
ENTER to confirm your setting.

Press and hold START/ENTER for 3 seconds to start the
program.

START/ENTER

START/ENTER

START/ENTER

START/ENTER

START/ENTER
> 3 Se c onds

Lithium Battery Program (LiPo/LiFe/Lilon/LiHV)

17 ·

D250

R:3SER S:3SER

CONFIRM(ENTER)

Lp3s 1.5A 12.14V

BAL 000:50 00022

START/ENTER

Charging Status Monitor

R shows the number of cells detected by the charger and S is the number
of cells set by you on the previous screen. If the two numbers are identical,
press START/ENTER to start the charging process.

During charge process, real-time status will be shown as seen on the left.

The battery icon indicates the charge/discharge status and finished
capacity percentage.
Green—charge Red—discharge

NOTE:

Program Stop
During the charging process, press STOP to stop the charging process.

Program Complete

Lithium Battery Program(LiPo/LiFe/Lilon/LiHV)

BATTERY CHECK

WAIT...

The charger is detecting the battery cell.

R shows the number of cells detected by the charger and S is
the number of cells set by you on the previous screen. If the
two numbers are not identical, press STOP to go back to the
previous screen to recheck the number of cells of the battery
pack that you set before going ahead.

R:3SER S:3SER

CANCEL(STOP)

[ END: FINISHED ]

16.8V 2600mAh

[ Time: 00: 45: 32 ]

16.8V 2600mAh

Once the battery is fully charged, the screen will read “END:
FINISHED” and the charger will emit a ringing sound. The
charger also displays battery voltage, charging capacity and
elapsed time.

· 18

D250

Lithium Battery Program (LiPo/LiFe/Lilon/LiHV)

VARIOUS INFORMATION DURING THE PROCESS

Press INC or DEC during the charging or discharging process to view further pertinent information on
the LCD screen.

Lp3s 1.5A 12.14V

BAL 000:50 00022

4.07 4.06 4.11 V

0.00 0.00 0.00 V

Fuel= 90%

Cell= 4.10V

IN C

IN C

Lp3s 1.5A 12.14V

BAL 000:50 00022

Ext. Temp ---­Int. Temp 37°C

DE C

Temp Cut-Off
　　　 50C

DE C

Final voltage when the program ends.

Input voltage.

Safety timer ON and duration of time in minutes.

Capacity cut-off ON and value of the set capacity limit.

Voltage of each cell in the battery pack when the battery is connected
with balance lead.

Internal temperature.
Temperature probe needs to be connected to show external temperature.

Charged capacity percentage and average cell voltage of the battery
pack.

Real-time status: battery type, battery cell count, charge current, battery
pack total voltage, elapsed time and charge capacity.

Cut off temperature.

DE C

DE C

DE C

DE C

End Voltage

12.6V(3S)

IN Power Voltage

12.56V

Safety Time
ON 200min

Capacity Cut-Off
ON 5000mAh

19 ·

D250

NiMH/NiCd Battery Program

NiMH CHARGE

CURRENT 2.0A

Press the ENTER button and the amp rate value will begin blinking.
Use the DEC or INC button to adjust the value to the desired rate.
Follow the instructions provided on your battery when setting the
charge current.
Press and hold the ENTER button for 3 seconds to start charging.

Once charging has commenced, the charger will display the
following real-time information: battery type, charging current, battery
voltage, charging time and charged capacity. Once the battery is fully
charged, the screen will read "END: FINISHED" and the charger will
emit a ringing sound. You can press the STOP button at any time
during the charging process to stop charging.

NiMH 2.0A 5.42V

CHG 002:22 00106

NiMH/NiCd:

This program is only suitable for charging/discharging NiMH/NiCd batteries. The D250 offers
the following NiMH/NiCd charge modes: Charge, Auto Charge, Discharge, Re-Peak and Cycle.

Selecting the Battery Type:

After powering on the D250, press the INC or DEC button repeatedly until you reach the
appropriate program for the battery type you wish to charge. For this example we have chosen
the “NiMH BATT“ or “NiCd BATT” program. Now press the ENTER button to enter the desired
program.

NiMH/NiCd Charge Mode:

BEFORE YOU BEGIN CHARGING YOUR BATTERY, MAKE SURE YOU HAVE READ AND
UNDERSTOOD ALL OF THE WARNINGS AND SAFETY INFORMATION CONTAINED ON
PAGES 06-08.

After selecting the correct battery type, if the screen does not read “CHARGE”, use the DEC or
INC buttons to change it to the “CHARGE” mode.

NiMH/NiCd Auto Charge Mode:

In this mode, the charger automatically detects the connected NiMH or NiCD battery and
determines the proper full charge and cut-off thresholds. Setting the upper charge current limit
for safe levels based on your battery specifications will ensure safe charging of your specific
battery. If you are unsure of the maximum allowable charge rates, set the charger to a
maximum of 1C (battery mAh/1000, e.g. 3200mAh = 3.2A).

BEFORE YOU BEGIN CHARGING YOUR BATTERY, MAKE SURE YOU ARE
CHARGING NIMH/NICD BATTERIES. CHARGING LIPO BATTERY UNDER NIMH/
NICD BATTERY PROGRAM WILL CAUSE FIRE.

WARNING!

START/ENTER

· 20

D250

NiMH/NiCd Battery Program

After selecting the correct battery type, use the INC or DEC
button to change the charge mode to the “Auto CHARGE”
setting.

Press the START button and the amp rate value will begin
flashing. Use the INC or DEC button to adjust the value to the
desired rate. Follow the instructions provided on your battery
when setting the upper charge amperage rate.

Press and hold the START button for 3 seconds to start charging.

Once charging has commenced, the charger will display the
following real-time information: battery type, charging current,
battery voltage, charging time and charged capacity.

Once the battery is fully charged, the screen will read “END:
FINISHED” and the charger will emit a ringing sound. You can
press the STOP button at any time during the charging process
to stop charging.

NiMH/NiCd Discharge Mode:

After selecting the correct battery type, use the INC or DEC
button to select the “DISCHARGE” mode. Press the START
button and the amp rate value will begin flashing. Use the INC
or DEC buttons to adjust the value to the desired discharge rate.
Press the START button again and the voltage cut-off will begin
to flash. Use the INC or DEC button to adjust the value to the
desired rate.

NiMH Auto CHARGE
CURRENT 1.3A

NiMH 1.3A 5.42V
AUT 002:22 00106

NiMH DISCHARGE

1.3A CUT:9.6V

Follow the instructions provided on your battery when setting the
voltage cut-off. The D250 will stop discharging when the battery
has reached the preset voltage cut-off.

Press and hold the START button for 3 seconds to start discharging.
Once discharging has commenced, the charger will display the
following real-time information: battery type, discharging current,
battery voltage, discharging time and discharged capacity.

NiMH 1.3A 10.42V
AUT 002:22 00106

START/ENTER

21 ·

D250

NiMH/NiCd Battery Program

When discharging is complete, the screen will read “END:
CUTOFF-VOL” and the charger will emit a ringing sound.
The charger will display the elapsed time, end voltage and the
discharged capacity in mAh.
You can press the STOP button at any time during the
discharging process to stop the discharge process.

NiMH/NiCd Re-Peak Mode:

Applicable to NiMH and NiCD batteries only, in re-peak mode the charger can peak­charge the battery once, twice, or three times in a row automatically. This process is good
for confirming that the battery is fully charged and for verifying how well the battery can
accept a fast charge. A five-minute cool-down delay occurs after each re-peak charge.

IN RE-PEAK MODE, THE D250 USES THE CHARGE AMPERAGE AND VOLTAGE
SETTINGS ENTERED IN CHARGE MODE.

After selecting the correct battery type, use the INC or DEC
button to select the “RE-PEAK” mode. Press the START button
and the Re-peak cycle number 1 begins to flash on the screen.
Use the INC or DEC button to scroll through the cycle count and
set a number between 1 and 3.
Press and hold the START button for 3 seconds to start the re­peak process.

[ TIME: 00:04:04 ]

9.6V 00640mAh

NiMH RE-PEAK
2

Once the Re-Peak process has begun, the charger will display
the following real-time information: battery type, charging
current, battery voltage, elapsed time and charged capacity.
Once the Re-Peak process has completed, the screen will read
“END: RE-PEAK” and the charger will emit a ringing sound. The
D250 will display the charge/discharge capacity for each cycle.
Using the + and - buttons, you can scroll through the history
data of each cycle.

NiMH 1.3A 10.42V
RPC 004:04 00686

START/ENTER

· 22

D250

NiMH/NiCd Battery Program

NiMH/NiCd Cycle Mode:

The D250 makes cycling of NiMH/NiCd batteries easy. The process of discharging and
recharging (cycling) can be performed automatically with one simple step and will
improve the performance of NiMH/NiCd batteries. We strongly recommend cycling any
battery that has been discharged and stored for a period of time. This will increase the
remaining usable battery life and also improve the battery performance.

After selecting the correct battery type, use the INC or DEC
button to select the “CYCLE” mode. The Cycle Mode gives you
two cycling options: “DCHG>CHG” or “CHG>DCHG“. The
“DCHG>CHG” option will first discharge the battery and then
recharge the battery.

The “CHG>DCHG” option will first charge the battery and then
discharge the battery. If this screen does not show your desired
cycling option, press the START button once and this setting will
begin flashing. Use the INC or DEC button to change this
setting.

Pressing the START button again will cause the cycle count to
begin flashing. Use the INC or DEC button to change this to the
number of cycles you want the D250 to run. The D250 can cycle
the battery a maximum of 5 times consecutively.
Press and hold the START button for 3 seconds to start the
Cycle Mode.

NiMH CYCLE
DCHG > CHG 2

NiMH CYCLE
CHG > DCHG 5

Once cycling has commenced, the charger will display the
following real-time information: battery type, charging/
discharging current, battery voltage, elapsed time and
charged/discharged capacity. You will also see “D>C“ or “C>D“.
This will indicate which cycling order you have chosen.
Either “D“ or “C“ will be flashing. This flashing indicates which
part of the cycle is currently being executed.

NiMH 0.5A 9.6V
D > C 004:04 00034

Once the cycling process is complete, the screen will read “END: CYCLE” and the
charger will emit a ringing sound. The D250 will display the charge/discharge capacity for
each cycle. Using the + and - buttons, you can scroll through this data for each cycle.

START/ENTER

23 ·

D250

Pb Lead-Acid Battery Program

Additional NiMH/NiCd Process Information:

During the NiMH/NiCd battery charging/discharging process the D250 can display a
variety of information. Using the INC or DEC buttons, you can also view the following
information:

NiMH Sensitivity
D.Peak 4mV/CELL

Ext. Temp ---­Int. Temp 37 C

Safety Time
ON 200min

In Power Voltage

12.56V

Temp Cut-off
50 C

Capacity Cut-Off
ON 5000mAh

Delta Peak Voltage
Sensitivity setting

External*/ internal
temperature

Safety timer
setting

Input Voltage

Temperature
cut-off

Capacity limit
setting

Pb Lead-Acid Battery Program

This program is only suitable for charging Pb (lead-acid)
batteries with nominal voltage ranging from 2 to 20V. Pb (lead­acid) batteries are significantly different from NiMH/NiCd
batteries. Pb batteries can only deliver a low current in relation
to their capacity. The same restriction applies to the charging
process. Consequently, the optimum charge current can only be
1/10th of the capacity. A Pb battery cannot be used for fast
charging. Please follow the instructions provided by the battery
manufacturer.
The D250 offers the following Pb charge modes: Charge and
Discharge.

Pb (Lead-Acid):

BATT/PROGRAM
Pb BATT

Pb Charge Mode:

After selecting the correct battery type, use the INC or DEC button to change it to the
“CHARGE“ mode.
Press the START button and the amp rate value will begin flashing. Use the INC or DEC
buttons to adjust the value to the desired charge rate. The amp rate should be set to
1/10th of capacity. For example, if you are charging a 20Ah battery the charge rate should
be set to 2A. Follow the instructions provided on your battery when setting the amp rate.

· 24

D250

Pb Lead-Acid Battery Program

Press the START button again and the nominal battery pack
voltage will begin flashing. Use the INC or DEC button to set the
voltage and the number of cells.
Press and hold the START button for 3 seconds to start
charging.

Once charging has commenced, the charger will display the
following real-time information: battery type, charging current,
battery voltage, charging time and charged capacity.
When charging is complete, the screen will read “FINISHED”
and the charger will emit a ringing sound.

Pb Discharge Mode:

After selecting the correct battery type, use the INC or DEC buttons to change it to the
“DISCHARGE“ mode.
Press the START button and the amp rate value will begin flashing. Use the INC or DEC
buttons to adjust the value to the desired discharge rate. Follow the instructions provided
with your battery when setting the amp rate.

Pb Charge

1.5A 12.0V(6P)

P-6 1.5A 13.56V
CHG 002:22 00106

Press the START button again and the nominal battery pack
voltage will begin flashing. Use the INC or DEC buttons to set
the voltage and the number of cells.
Press and hold the START button and discharging will begin.

Once discharging has commenced, the charger will display the
following real-time information: battery type, discharging current,
battery voltage, discharging time and discharged capacity.
When discharging is complete, the screen will read “FINISHED”
and the charger will emit a ringing sound.

Additional Pb Process Information:

During the Pb battery charging/discharging process the D250 can display a variety of
information. Using the INC or DEC buttons you can also view the following information:

Pb Discharge

1.5A 12.0V(6P)

P-6 1.0A 13.56V
DCH 005:10 00964

Capacity Cut-Off
ON 5000mAh

Temp Cut-off
50 C

In Power Voltage

12.56V

Safety Time
ON 200min

Ext. Temp ---­Int. Temp 37 C

Capacity cut­off setting

Temperature
cut-off

Input voltage

Safety timer
setting

External*/ internal
temperature

25 ·

D250

DC Power Supply

Your Ultimate Duo 250W can supply 150 Watts DC Power. You can use it to power
equipments that require DC power. It converts standard household power 100-240V AC
to 13.8V DC power.

Operating Instruction

BATT/PROGRAM
SYSTEM SETTING->

CH1: 100 CH2: 100W
DC SUPPLY: 50W

ENTER

Press the ENTER to enter the DC Power Supply program

Set the power of channel 1 and channel 2, the power supply will
take the rest power automatically.

Caution: The maximum DC Power output is 150 Watts and the maximum current is 10A.
Please check the total loading of your equipments before using DC power supply.

If the loading of DC power supply is over 150W, the led light will flash red.

ENTER

CH1: 50 CH2: 50W
DC SUPPLY: 150W

· 26

D250

Battery Memory Set and Call Out

[ B A TT M E M O RY 1 ]
E N TE R S E T ->

B A TT T Y P E
L i Po

B A TT V O L T S
7 . 4V ( 2 S )

C H AR G E C U RR E N T
4 . 9A

D S CH C U R R EN T
2 . 0A

D S CH V O L T AG E
3 . 0V / C E LL

T V C= Y O U R RI S K
4 . 20 V

S A VE P R O G RA M
E N TE R

The charger can store up to 20 different charge/discharge profiles(each channel 10 sets)
for your convenience, and the stored profiles can be recalled quickly without having to go
through the setup process.
When you are willing to alter the parameter value in the program, press START/ENTER
to make it blink then change the value with INC or DEC. The value will be stored by
pressing START/ENTER once.
Note: All following screen are taking 2S(7.4V) LiPo battery for example.

Enter the battery memory program.
(10 different charge/discharge profiles can be stored in each channel).

Set the battery type(LiPo/LiFe/LiIon/LiHV/NiMH/NiCd/Pb).

Set the voltage and number of cells(1S-6S).

Set the charge current(0.1-10.0A).

Set the discharge current (0.1A-2.0A).

Set the discharge voltage(3.0-3.3V/Cell).

Set the terminal voltage(4.18-4.25V).

Press ENTER to save program.

1. Battery Memory Set

START/ENTER

DE C IN C

DE C IN C

DE C IN C

DE C IN C

DE C IN C

DE C IN C

START/ENTER

27 ·

D250

Battery Memory Set and Call Out

E N TE R CH A R G ER
L O AD

L i Po B AL A N C E CH G
4 . 9A 7 .4 V (2 S)

S A VE P RO G R A M
S A VE .

[ B A TT M EM O RY 1 ]
L i Po  7 .4 V ( 2S )

[ B A TT M EM O RY 1 ]
C : 4. 9A D : 2. 2A

Indicate the battery type and battery cell of the saved profile.

Indicate the charge and discharge current of the saved profile.
Press the START/ENTER for 3 seconds to call out the memory.

2. Battery Memory Call Out

Load the memory set

Press START/ENTER for 3 seconds to start the process.

START/ENTER
>3 Seconds

· 28

D250

System Setting

S a fe ty T i m e r
O N 1 20 Mi n

R e st T im e
C H G> DC H G 10 Mi n

C a pa ci t y C u t- Of f
O N 5 00 0m A H

T e mp er a t u re U ni t
C e ls iu s

T e mp C ut - O f f
O N 5 0 C 1 2 2 F

This program sets the maximum charge
capacity that will be supplied to the battery
during charge. If the delta peak voltage is
not detected nor the safety timer expired by
any reason, this feature will automatically
stop the process at the selected capacity
value.

When you start a charge process, the
integral safety timer automatically starts
running at the same time. This is
programmed to prevent overcharge the
battery if it proves to be faulty, or if the
termination circuit cannot detect the battery
full. The value for the safety timer should be
generous enough to allow a full charge of
the battery.

The battery's internal chemical reaction will
cause the temperature of the battery to
rise. If the temperature limit is reached, the
process will be terminated.

OFF/
ON
(100-50000 mAh)

It will be operated with the default value of the essential user settings when it is powered
on for the first time.The screen displays the following information in sequence and the
user can change the value of parameter on each screen.
When you are willing to alter the parameter value in the program, press START/ENTER to
make it blink then change the value with INC or DEC. The value will be stored by
pressing START/ENTER once.

ITEM

SELECTION DESCRIPTION

OFF/
ON
(1-720 Min)

OFF/
ON
(20 C/68 F ­80 C/176 F)

Celsius
Fahrenheit

1-60Min

A rest time allowing the battery to cool
down between charging/discharging cycle.

You can choose the temperature displayed
by Celsius or Fahrenheit as you like.

29 ·

D250

ITEM

SELECTION DESCRIPTION

System Setting

N i MHS en s i t iv it y
D . Pe ak D e f a ul t

N i CdS en s i t iv it y
D . Pe ak D e f a ul t

Default: 4mV/Cell
5-15mV/Cell

K e y Be ep O N
B u zz er O N

OFF/ON

The beep sounds at every time touching
the buttons to confirm your action. The
beep or melody sounded at various times
during operation to alert different mode
changes.

D C I np ut . L ow
C u t- Of f 1 1. 0V

10.0-11.0V

This program monitors the voltage of input
battery. If the voltage drops below the value
you set the operation forcibly terminated to
protect the input battery.

This program is for NiMH/NiCd battery only.
When the charger detects the delta peak
value reaches the value you set, the
charger will say the battery is fully charged.

L o ad F ac t o r y Se t
E n te r

V e rs io n
H W :1 .0 0 F W : 1 .1 0

Press ENTER to load factory default setting.

It indicates the hardware and firmware
version.

S y nc hr o n i za ti o n
O F F

OFF/ON

if you set it , channel 2 will synchronize the
same operation as Channel 1.

· 30

D250

Battery Voltage Meter

The user can check battery's total voltage, the highest voltage, the lowest voltage and
each cell's voltage.
Please connect the battery to the charger main battery lead to battery socket and balance
wires to balance socket.

B A TT /P R O G RA M
B A TT M ET E R

4 . 20 4 .1 9 4 .1 9 V
4 . 18 4 .1 8 4 .1 9 V

M A IN 2 5. 1 3 V
H 4 .2 00 V L 4 . 18 2V

Press the START/ENTER to enter the Lithium
Battery Meter program.

The screen indicate each cell's voltage.

The screen indicate the total voltage, the highest voltage and the
lowest voltage.

START
ENTER

DE C

This diagram shows the
correct way to connect
your battery to check
the voltage.

IN C

ENTER

STATUS

BATT/
PROG

ENTERSTATUS

BATT/
PROG

4. 19 4 .15 4 .18 V

4. 15 4 .19 4 .18 V

4. 19 4 .15 4 .18 V

4. 15 4 .19 4 .18 V

The user can check battery's total resistance, the highest resistance, the lowest
resistance and each cell's resistance.
Please connect the battery to the charger main battery lead to battery socket and balance
wires to balance socket.

Battery Resistance Meter

Press the START/ENTER to enter the Lithium
Battery Resistance program.

The screen indicate each cell's resistance.

The screen indicate the total resistance, the highest
resistance and the lowest resistance.

Start
Enter

B A TT /P R O G RA M
B A TT R ES I S T AN CE

0 1 2 00 5 00 5 mΩ

0 0 6 mΩ

T A TA L :2 8 mΩ

H :1 2mΩ L :5 mΩ

DE CIN C

ENTER

STATUS

BATT/
PROG

ENTERSTATUS

BATT/
PROG

31 ·

D250

0 0 5 0 0 3 00 3 mΩ
0 0 0 0 0 0 00 0 mΩ

0 0 5 0 0 3 00 3 mΩ
0 0 0 0 0 0 00 0 mΩ

This diagram shows the
correct way to connect
your battery to check
the resistance.

· 32

D250

Warning and Error Message

In case of an error the screen will display the cause of error and emit an audible sound.

Incorrect polarity connected.

The battery is interrupted.

C O NN EC T E R R OR
C H EC K MA I N PO RT

Thebattery connection is wrong.

The cell number is wrong.

C E LL N UM B E R
I N CO RR E C T

Voltage of one cell in the battery pack is too high.

C E LL E RR O R
H I GH V OL T A G E

Voltage of one cell in the battery pack is too low.

C E LL E RR O R
L O W VO LT A G E

The internal temperature of the unit goes too high.

I N T. TE M P . TO O HI

D C I N TO O LO W

Input voltage less than 11V.

Input voltage higher than 18V.

D C I N TO O HI G H

B A TT ER Y W A S F UL L

The battery voltage is higher than the maximum voltage
which the user sets when charging in balance mode.

C E LL E RR O R
V O LT AG E - I NV AL I D

Voltage of one cell in the battery pack is invalid.

The external temperature of the battery goes too high.

E X T. TE M P . TO O HI

O V ER C HA R G E
C A PA CI T Y L I MI T

The battery capacity is more than the maximum capacity
which the user sets.

O V ER T IM E L IM IT

The charging time is longer than the maximum charging
time which the user sets.

B A LA NC E C O N NE CT
E R RO R

Thebalanceconnectiswrong.

D250

Specification

DC Input Voltage : 11-18V AC Input Voltage: 100-240V
Display Type: 2x16 LCD Display Backlight: Black
Case Material: Metal Controls: Eight Buttons
Case Size: 184x146x70mm Weight: 1293g
DC Power Supply Output: 13.8V / Max. 150W
PC Communications: USB Port for Firmware Upgrade
External Port: 2-6S Balance Socket-XH, Temperature Probe Socket,
Battery Socket, DC Input, Micro USB Port for PC.
Delta Peak Detection for NiMH/NiCd: 5-15mV/cell / Default: 4mV/cell
Charge Cutoff Temperature: 20ºC/68ºF-80ºC/176ºF(adjustable)
Charge Voltage: NiMH/NiCd: Delta peak detection
 LiPo: 4.18-4.25V/cell LiIon: 4.08-4.2V/cell
LiFe: 3.58-3.7V/cell LiHV: 4.25-4.35V/cell
Balance Current: 300mA/cell
Reading Voltage Range: 0.1-26.1V
Battery Types/Cells: LiPo/LiIon/LiFe/LiHV: 1-6cells
NiMH/NiCd: 1-15cells
 Pb: 2-20V
Battery Capacity Range: NiMH/NiCd: 100-50000mAh
LiPo/LiIon/LiFe/LiHV: 100-50000mAh
Pb: 100-50000mAh
Charge Current: (0.1A-10.0A) x2
Safety Timer: 1-720minutes off
Charge Wattage: Channel 1: 50-120W Channel 2: 50-120W
Power Supply: 10-150W CH1+CH2+PS=250W
Discharge Current: (0.1A-2.0A) x2
Discharge Cut-off Voltage: NiMH/NiCd: 0.1-1.1V/cell
LiPo: 3.0-3.3V/cell LiIon: 2.9—3.2V/cell
LiFe: 2.6-2.9V/cell LiHV: 3.1-3.4V/cell
Pb: 1.8V
Discharge Wattage: 10Wx2
Balance Cells: 2-6 cells
Language of Voice: English
Memory: 10x2 Different Charge/Discharge Profiles
Charge Method: CC/CV for Lithium Types and Lead (Pb) Batteries
Delta-peak Sensitivity for NiMH/NiCd.

· 34

D250

Conformity Declaration

Never leave the charger unattended when it is connected to its power socket. If any malfunction is
found, TERMINATE THE PROCESS AT ONCE.

Keep the charger well away from dust, damp, rain, heat, direct sunshine and vibration. Never drop it.

Never charge batteries on wood, cloth, carpet or on any other flammable material.

During charging, the charger must be placed in a well ventilated area.

The allowable AC input voltage is 100~240V AC.

This appliance can be used by children aged from 14 years and above and persons with reduced physical,
sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or
instruction concerning use of the appliance in a safe way and understand the hazards involved. Children shall
not play with the appliance. Cleaning and user maintenance shall not be made by children without
supervision.
If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified
persons in order to avoid a hazard.

This marking indicates that this product should not be disposed with other household wastes
throughout the EU. To prevent possible harm to the environment or human health from uncontrolled
waste disposal, recycle it responsibly to promote the sustain able reuse of material resources. To
return your used device, please use the return and collection systems or contact the retailer where the
product was purchased. They can take this product for environmental safe recycling.

This symbol means that you must dispose of electrical from the general household waste when it
reaches the end of its useful life. Take your charger to your local waste collection point or recycling
centre. This applies to all countries of the European Union, and to other European countries with a
separate waste collection system.

The D250 Charger satisfy all relevant and mandatory CE directives and FCC Part 15 Subpart B: 2016.

EN55014-1:2006+
A1:2009+A2:2011

Electromagnetic compatibility - Requirements for household
appliances, electric tools and similar apparatus - Part 1: Emission

EN55014-2: 2015

Electromagnetic compatibility - Requirements for household
appliances, electric tools and similar apparatus - Part 2:
Immunity - Product family standard

EN 61000-3-2:2014

Electromagnetic compatibility (EMC) - Part 3-2: Limits - Limits for
harmonic current emissions (equipment input current <= 16 A per
phase)

EN 61000-3-3:2013

Electromagnetic compatibility (EMC) - Part 3-3: Limits - Limitation
of voltage changes, voltage fluctuations and flicker in public low­voltage supply systems, for equipment with rated current <= 16 A
per phase and not subject to conditional connection

For CE directives:
The product has been tested to meet the following technical standards:

EN 60335-1: 2012
+A11: 2014

EN 60335-2-29:
2004+A2: 2010

EN 62233: 2008

Household and similar electrical appliances - Safety - Part 1:
General requirements

Household and similar electrical appliances - Safety - Part 2:
Particular requirements for battery chargers

Measurement methods for electromagnetic fields of household
appliances and similar apparatus with regard to human exposure

35 ·

D250

Commonly used terms

Final charge voltage: the voltage at which the battery's charge limit (capacity limit) is
reached. The charge process switches from a high current to a low maintenance rate
(trickle charge) at this point. From this point on further high current charging would cause
overheating and eventual terminal damage to the pack.

Final discharge voltage: the voltage at which the battery's discharge limit is reached. The
chemical composition of the batteries determines the level of this voltage. Below this
voltage the battery enters the deep discharge zone. Individual cells within the pack may
become reverse polarized in this condition, and this can cause permanent damage.

A, mA: unit of measurement relating to charge or discharge current.1000 mA = 1 A
(A=Ampere,mA=Milliampere)

Ah, mAh: unit of measurement for the capacity of a battery (Amperes x time unit; h = hour).
If a pack is charged for one hour at a current of 2 A, it has been fed 2 Ah of energy. It
receives the same quantity of charge (2 Ah) if it is charged for 4 hours at 0.5 A, or 15
minutes (=1/4 h) at 8 A.

'C'-rating: Capacity is also referred to as the 'C' rating. Some battery suppliers recommend
charge and discharge currents based on the battery 'C' rating. A battery's '1C' current is the
same number as the battery's rated capacity number, but noted in mA or amps. A 600mAh
battery has a 1C current value of 600mA, and a 3C current value of (3 x 600mA) 1800mA or

1.8A. The 1C current value for a 3200mAh battery would be 3200mA (3.2A).

Nominal voltage(V): The nominal voltage of the battery pack can be determined as follows;

-.NiCd or NiMH: multiply the total number of cells in the pack by 1.2. A 8-cell pack will have a
nominal voltage of 9.6 volts (8x1.2).

-.LiPo: multiply the total number of cells in the pack by 3.7. A 3-cell LiPo wired in series will
have a nominal voltage of 11.1 volts (3x3.7).

-.LiIo: multiply the total number of cells in the pack by 3.6. A 2-cell LiIo wired in series will have
a nominal voltage of 7.2 volts (2x3.6).

-.LiFe: multiply the total number of cells in the pack by 3.3. A 4-cell LiIo wired in series will have
a nominal voltage of 13.2 volts (4x3.3).

-.LiHV: multiply the total number of cells in the pack by 3.7V. A 4-cell LiHV wired in series will
have a nominal voltage of 14.8 volts (4x3.7).
If the nominal voltage of the battery is not printed on the battery's label, consult your battery
manufacturer or supplier. Do not guess the rated voltage of battery.

Commonly Used Terms

· 36

D250

Warranty and Service

This charger is designed and approved exclusively for use with the types of battery stated
in this Instruction Manual. SkyRC accepts no liability of any kind if the charger is used for
any purpose other than that stated.
We are unable to ensure that you follow the instructions supplied with the charger, and
we have no control over the methods you employ for using, operating and maintaining the
device. For this reason we are obliged to deny all liability for loss, damage or costs which
are incurred due to the incompetent or incorrect use and operation of our products, or
which are connected with such operation in any way.Unless otherwise prescribed by law,
our obligation to pay compensation, regardless of the legal argument employed, is limited
to the invoice value of those SkyRC products which were immediately and directly
involved in the event in which the damage occurred.

Liability exclusion

Warranty and service

We guarantee this product to be free of manufacturing and assembly defects for a period of
one year from the time of purchase. The warranty only applies to material or operational
defects, which are present at the time of purchase. During that period, we will repair or
replace free of service charge for products deemed defective due to those causes.

This warranty is not valid for any damage or subsequent damage arising as a result of misuse,
modification or as a result of failure to observe the procedures outlined in this manual.

The warranty service is valid in China only.

If you need warranty service overseas, please contact your dealer in the first
instance, who is responsible for processing guarantee claims overseas. Due
to high shipping cost, complicated custom clearance procedures to send
back to China. Please understand SkyRC can't provide warranty service to
overseas end user directly.

If you have any questions which are not mentioned in the manual, please
feel free to send email to [e-mail]

Note:

1.

2.

3.

Printed in China 2017.02

All specifications and figures are subject to change without notice.

This content is subject to change.

Latest version can be downloaded
from www.skyrc.com

If you have any question about this document, please contact
SkyRC by sending a message to [e-mail]
All Rights Reserved.

RoHS

7504-0878-01