Skyrc e6680, e6650 Instruction Manual

Version 1.0C SkyRC Technology Co., Ltd. 2010

INSTRUCTION MANUAL

- 01 -

TABLE OF CONTENTS

Introduction

Special Features

Lithium Polymer Balance Charge Program Connection Diagram

Warning and Safety Notes

Program Flow Chart

Initial Parameter Setup (Users Set Up)

Lithium (LiPo/Lilon/LiFe) program

Charging Lithium Battery in Charge Mode

Charging Lithium Battery in Balance Mode

Fast Charging of Lithium Battery

Charging Lithium Battery in the Fast Charge Mode

Storage Control of Lithium Battery

Charging Lithium Battery in the Storage Mode

Discharging of Lithium Battery

Voltage Balancing and Monitoring in the Discharge Process

Charging of NiCd/NiMH Battery

Charging NiCd/NiMH Battery in the Charge Mode

Discharge of NiCd/NiMH Battery

Charge/Discharge and Discharge/Charge Cycle of NiCd/NiMH Battery

Charging of the Pb Battery

Charging Pb (lead-acid) Battery in the Charge Mode

Discharging of the Pb Battery

Data Storage Program

Load Data Program

Various Information in the Program

Warning and Error Message

Specifications

Warranty and Service

TABLE OF CONTENTS

02

03

05

06

11

12

15

16

16

17

17

18

18

19

19

20

20

20

21

21

22

22

23

24

25

26

27

27

- 02 -

INTRODUCTION

Thank you for purchasing the e6680 LiPo Balance Charger by
SKYRC.This product is a rapid charger with a high performance
microprocessor and specialized operating software. 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!

INTRODUCTION

DC Input Power Port
11-18V DC

LCD Display
(16 chr.* 2 lines)

Balance
Socket

Output
Charging

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

Resume or Start Charge Processes
Confirm an Action

Temperature
Sensor Port

Temperature
Controlled Fan

AC Input Power Port
(AC 100-240V, 50/60HZ)

Scroll Through
the Main Menu
Stop any Charge
Processes

- 03 -

SPECIAL FEATURES

Optimized operating software

e6680 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

Internal independent lithium battery balancer

e6680 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, e6680 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

e6680 is adaptable to various types of Lithium batteries, such as
Li-ion, LiPo and the new LiFe series of batteries.

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.

Maximum safety

Delta-peak sensitivity: 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.

- 04 -

SPECIAL FEATURES

Automatic charging current limit

You can set up the upper limit of the charging current when
charging your NiCd or NiMH 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 this package.

Processing time limit:

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

Input power monitoring

To protect the car battery used as DC input power from being
damaged, its voltage keeps being monitored. If it drops below
the lower limit, the process will be ended automatically.

Data store/load

The maximum five batteries’ data can be stored for users’
convenience. 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.

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.

- 05 -

LITHIUM POLYMER BALANCE CHARGE PROGRAM
CONNECTION DIAGRAM

This diagram shows the correct way to connect your battery to
the e6680 charger while charging in the balance charge program
mode only.

LITHIUM POLYMER BALANCE CHARGE PROGRAM
CONNECTION DIAGRAM

WARNING:

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

The main battery leads must be connected along with the balance
lead connector as shown before charging your battery .

- 06 -

WARNING AND SAFETY NOTES

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.

WARNING AND SAFETY NOTES

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 input voltage is 11-18V DC/110-240V AC.

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

- 07 -

WARNING AND SAFETY NOTES

NiCd/NiMH

- Voltage level: 1.2V/cell

- Allowable fast charge current: 1C-2C (depends on the
performance of cell)

- Discharge voltage cut off level: 0.85V/cell (NiCd),

1.0V/cell(NiMH)

Li-ion

- Voltage level: 3.6V/cell

- Max. charge voltage: 4.1V/cell

- Allowable fast charge current: 1C or less

- Min. discharge voltage cut off level: 2.5V/cell or higher

LiPo

- Voltage level: 3.7V/cell

- Max. charge voltage: 4.2V/cell

- Allowable fast charge current: 1C or less

- Discharge voltage cut off level: 3.0V/cell or higher

LiFe

- Voltage level: 3.3V/cell

- Max. charge voltage: 3.6V/cell

- Allowable fast charge current: 4C or less

- Discharge voltage cut off level: 2.0V/cell or higher

Pb

- Voltage level: 2.0V/cell

- (Lead-acid) Max. charge voltage: 2.46V/cell

- Allowable fast charge current: 0.4C or less

- Discharge voltage cut off level: 1.75V/cell or higher

- 08 -

WARNING AND SAFETY NOTES

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.

Do not connect more than one battery pack to this charger at
any one time.

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

A battery pack which consists of different types of cells
(including different manufacturers)

Batteries that are not expressly stated by the manufacturer to
be suitable for the currents the charger carries during the
charge process.

Batteries installed in a device or which are electrically linked to
other components.

A battery fitted with an integral charge circuit or a protection
circuit.

A faulty or damaged battery.

Batteries that require a different charge technique from NiCd,
NiMh, LiPo or Gel cell (Pb, Lead acid).

Non-rechargeable batteries (Explosion hazard).

A battery that is already fully charged or just slightly discharged.

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?

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).

Did you set up adequate current for charging or discharging?

- 09 -

WARNING AND SAFETY NOTES

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 gold-plated should be fitted to both ends.

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

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

Do not attempt to disassemble the battery pack arbitrarily.

- 10 -

WARNING AND SAFETY NOTES

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’s capacity by
the number of cells with total voltage stay the same. The voltage’s
imbalance may cause fire or explosion .Lithium battery is
recommended to charge in series.

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.

Lithium batteries are recommended to be discharged partially
rather than fully discharged. Frequent full discharging should be
avoided if possible. Instead, charge the battery more often or use
a battery of larger capacity.Full capacity cannot be used until it
has been subjected to 10 or more charge cycles. The cyclic
process of charge and discharge will optimize the capacity of
battery pack.

- 11 -

PROGRAM FLOW CHART

PROGRAM FLOW CHART

- 12 -

INITIAL PARAMETER SETUP (USERS SET UP)

INITIAL PARAMETER SETUP (USERS SET UP)

As default this charger will be set to typical user settings when it is
connected to AC 110-240V or DC 11-18V for the first time. The
screen displays the following information in sequence and the user
can change the parameter on each screen.

e6680 recognize the cell count of Lithium battery
automatically at the beginning of charge or
discharge process to avoid from erroneous
setting by user. But deeply discharged battery
can be perceived incorrectly. To prevent the
error, you can set the time term to verify the cell
count by the processor. Normally, 10 minutes
are enough to perceive the cell count correctly.
For the battery of larger capacity, you may
extend the time term. But if you set the time
term to long for the battery of smaller capacity,
the charge or discharge process can be finished
within the time term with the erroneous cell count.
This may cause the fatal result. If the processor

USER SET
PROGRAM->

LiFe
V.Type 3.3V

LiPo/LiIo/LiFe
CHK Time 10min

INC

INCDEC

INCDEC

User setup starting screen.

The screen displays the nominal voltage of
Lithium battery. There are three kinds of Lithium
battery: LiFe(3.3V), Lilon(3.6V) or LiPo(3.7V).
This is very important so you have to check the
battery carefully and set it up correctly. If it is
different from correct value the battery may be
exploded during charge process.

If you need to alter the parameter value in the program, press
“Start/Enter” key to make it blink then change the value with “INC”
or “DEC” key. The value will be stored by pressing “Start/Enter” key
once.

-

+

- 13 -

INITIAL PARAMETER SETUP (USERS SET UP)

NIMH Sensitivity
D.Peak Default

NICD Sensitivity
D.Peak Default

Temp. Cut-off
ON 80C

INCDEC

INCDEC

-+

INCDEC

-+

INCDEC

INCDEC

-+

INCDEC

INCDEC

-+

INCDEC

INCDEC

INCDEC

-+

INCDEC

-+

recognizes the cell count incorrectly at the
beginning of charge or discharge process, you
may extend the time. Otherwise, you had better
use with the default value.

This shows the trigger voltage for automatic
charge termination of NiMH and NiCd battery.
The effective value ranges from 5 to 20mV per
cell. If the trigger voltage is set higher, there is
a danger of overcharging the battery; if it is set
lower, there is a possibility of premature
termination. Please refer the technical
specification of the battery. (NiCd default: 12mV,
NiMH default: 7mV)

An optional feature using temperature probe
contacting the surface of battery, the temperature
cut-off can be on or off. If it is on, set the
maximum temperature at which the charger
should allow battery to reach during charge.
Once a battery reaches this temperature during
charge, the process will be terminated to protect
the battery.

Waste time
CHG/DCHG 5min

The battery becomes warm after cycles of
charge/discharge process. The program will
insert a time delay after each charge/discharge
process to allow the battery enough time to cool
down before beginning next cycle of charge/
discharge process. The valid value ranges from
0 to 60 minutes.

- 14 -

INITIAL PARAMETER SETUP (USERS SET UP)

Safety time
ON 120min

Key Beep ON
Buzzer ON

Input Power Low
Cut-Off 10.0V

When the charge process starts, the integrated
safety timer starts to run simultaneously. If error
detected or the termination circuit can not detect
whether the battery is fully charged or not, this
unit is programmed to prevent overcharging.
Please refer to the below statement to calculate
the timer you set.

Safe Timer Calculation

When charging NiCd or NiMH batteries, divide the capacity by current,
then divide the result by 11.9, set this number of minutes as the value
for safety timer setting. If the charger stopped at this time threshold,
about 140% of the capacity will have been fed into the battery.

For example:
Capacity Current Safety Time
2000mAh 2.0A (2000/2.0=1000)/11.9=84 minutes
3300mAh 3.0A (3300/3.0=1100)/11.9=92 minutes
1000mAh 1.2A (1000/1.2=833)/11.9=70 minutes

INCDEC

INCDEC

-

+

INCDEC

-

+

Capacity Cut-Off
ON 5000mAh

INCDEC

INCDEC

INCDEC

INCDEC

-+

INCDEC

-+

INCDEC

-+

The program provides maximum capacity
protection function. If the Delta-peak voltage
can not be detected or the safety timer times
out, the charge process will stop automatically,
when the battery reaches the user-set maximum
charge capacity,

The beep to confirm users' operation sounds
every time a button is pressed. The beep or
melody sounds at various times during operation
to confirm different mode change. These
functions can be switched on or off.

This function monitors the voltage of the input
battery used to power this charger. If the voltage
is lower than user-set value, the program will
end forcibly to protect the input battery.

- 15 -

LITHIUM (LIPO/LIION/LIFE) PROGRAM

LITHIUM (LIPO/LIION/LIFE) PROGRAM

The program is only suitable for charging/discharging Lithium(LiPo/
LiIon/LiFe) batteries with a nominal voltage of 3.3/3.6/3.7V/cell.
Different batteries have different charge technique. There are two
methods termed as constant voltage and constant current. The
charge current varies according to battery capacity and specification.
The final voltage is very important; it should precisely match the
voltage of the battery: LiPo is 4.2V, LiIon is 4.1V and LiFe is 3.6V.
The current and voltage of the battery should be correctly set.
When you want to change the values of parameters, please press
START/ENTER key to make it blink and then use DEC or INC to
change the value. Then press START/ENTER key again to store the
value.

The left side of the first line shows the type
of battery you choose. The value on the left
of the second line of the charger is current
user set, After setting the current and
voltage, press START/ENTER key for more
than 3 seconds to start the process.(charge
current: 0.1-5.0A, voltage: 3.7-22.2V).

CHARGING OF LITHIUM BATTERY

LiPo CHARGE

2.0A 11.1V(3S)

INCDEC

-

+

INCDEC

-

+

Batt type
Stop

Start
Enter

Start
Enter

‘>3 seconds’

This displays the number of cells you set up
and the processor detects.”R” shows the
number of cells detected by the charger
and “S” is the number of cells set by you at
the previous screen. If both numbers are
identical you can start charging by press
START/ENTER button. If not, press BATT
TYPE/STOP button to go back to previous
screen to carefully check the number of cells
of the battery pack before going ahead.

R:3SER S:3SER
CONFIRM(ENTER)

This screen shows the real-time status
during charge process. Press BATT TYPE/
STOP key once to stop the charge process.

Li3s 1.2A 12.59V
CHG 022:43 00682

Number
of cells

Charging
time

Charging
current

Battery
voltage

Charged
capacity

- 16 -

CHARGING LITHIUM BATTERY IN THE CHARGE MODE

CHARGING LITHIUM BATTERY IN THE CHARGE MODE

This charging mode is for charging Li-Po/Ion/Fe battery without
balance lead.

The left side of the first line shows the type
of battery you choose. The value on the left
of the second line of the charger is current
user set, After setting the current and
voltage, press START/ENTER key for more
than 3 seconds to start the process.(charge
current: 0.1-5.0A, voltage: 3.7-22.2V).

BALANCE CHARGING OF LITHIUM BATTERY

LiPo BALANCE

2.0A 11.1V(3S)

INCDEC

-

+

INCDEC

-

+

Batt type
Stop

Start
Enter

Start
Enter

‘>3 seconds’

This displays the number of cells you set up
and the processor detects.”R” shows the
number of cells detected by the charger
and “S” is the number of cells set by you at
the previous screen. If both numbers are
identical you can start charging by press
START/ENTER button. If not, press BATT
TYPE/STOP button to go back to previous
screen to carefully check the number of cells
of the battery pack before going ahead.

R:3SER S:3SER
CONFIRM(ENTER)

This screen shows the real-time status
during charge process. Press BATT TYPE/
STOP key once to stop the charge process.

Li3s 1.2A 12.59V
BAL 022:43 00682

Number
of cells

Charging
time

Charging
current

Battery
voltage

Charged
capacity

This function is for balancing the voltage of Lithium-polymer battery
cells while charging. In the balance mode, the battery needs to have
a balance lead to connect to the individual balance port at the right
side of the charger. And you need to connect the battery's power lead
to the output of charger.
Charging in this mode is different from the normal modes, because
the built-in processor monitors voltage of individual cell and control
input current fed into each cell to equalized voltage of individual cell.

CHARGING LITHIUM BATTERY IN THE BALANCE MODE

- 17 -

FAST CHARGING OF LITHIUM BATTERY

LiPo FAST CHG

2.0A 11.1V(3S)

INCDEC

-

+

INCDEC

-

+

Batt type
Stop

Start
Enter

Start
Enter

‘>3 seconds’

R:3SER S:3SER
CONFIRM(ENTER)

Li3s 2.0A 12.59V
FAS 022:43 00682

Number
of cells

Charging
time

Charging
current

Current
voltage
battery

Supplied
capacity

Charging current will become lower when it progress to the end of
charging. A specific CV process will be reduced to end the charging
process earlier. In fact, the charging current will goes to 1/5 when the
charging process comes to 1/10. Charging capacity will be little
smaller than normal charging, but charging time will be shortened
accordingly.

CHARGING LITHIUM BATTERY IN THE FAST CHARGE MODE

FAST CHARGING OF LITHIUM BATTERY

The value on the left side of the second lines
sets the charge current. The value on the
right side of the second lines sets the battery
pack's voltage. After setting current and
voltage, press STAR/ENTER for more than
3 seconds to start the process.

This displays the number of cells you set up
and the processor detects. “R” shows the
number of cells detected by the charger and
“S” is the number of cells set by you at the
previous screen. If both numbers are
identical you can start charging by press
START/ENTER button. If not, press BATT
TYPE/STOP button to go back to previous
screen to carefully check the number of cells
of the battery pack before going ahead.

This screen shows the real-time status during
charge process. Press BATT TYPE/STOP
key once to stop the charge process.

- 18 -

STORAGE CONTROL OF LITHIUM BATTERY

STORAGE CONTROL OF LITHIUM BATTERY

At this screen, you can set up the current
and voltage of the battery pack. Charging
and discharging will make the batteries
come to the voltage level of “Storage” state.

LiPo STORAGE

1.0A 11.1V(3S)

INCDEC

-

+

INCDEC

-

+

Batt type
Stop

Start
Enter

‘>3 seconds’

This screen shows the real-time status
charging. Press BATT TYPE/STOP key
once to stop the charge process.

Li3s 1.0A 12.59V
STO 022:43 00682

Number
of cells

Elapsed
time

Charge or
discharge
current

Current
voltage
battery

Supplied
capacity

This function is for charging/discharging batteries which are not used
at once. This program is designed for charging or discharging of
batteries of specific original state. They are classified by types: 3.75V
Lilon, 3.85V LiPo and 3.3V LiFe. The program will begin to discharge
if the original state of the battery exceeds the voltage level of storage.

CHARGING LITHIUM BATTERY IN THE STORAGE MODE

- 19 -

DISCHARGING OF LITHIUM BATTERY

DISCHARGING OF LITHIUM BATTERY

The value of discharge current on the left
can not exceed 1C, and the value on the
right can not be under the voltage
recommended by the manufacturer to avoid
deep discharging. Press START/ENTER for
more than 3 seconds to start discharging.

LiPo DISCHARGE

1.0A 11.1V(3S)

INC

INC

DEC

-

+

INCDEC

-

+

Batt type
Stop

Start
Enter

‘>3 seconds’

This shows the real-time status of
discharging, you can press BATT
TYPE/STOP key to stop discharging.

Li3s 0.4A 12.59V
DSC 022:43 00682

BATTERY VOL ERR
CELL LOW VOL

4.14 4.16 4.09

2.18 0.00 0.00

Number
of cells

Elapsed
time

Discharge
current

Battery
voltage

Discharged
capacity

The processor monitors voltage of each cell when the battery packs
are during its “storage” and “discharging” process. If voltage of any
cell is abnormal, e6680 will show error message and terminate the
program forcibly. So if there is battery damage or disconnection, you
can see the error message and press INC to know which cell is
damaged.

VOLTAGE BALANCING AND MONITORING IN THE
DISCHARGE PROCESS

The processor detects voltage of one cell is
too low.

The 4th cell was damaged. The value of
voltage may be zero if disconnection occurs.

- 20 -

CHARGING OF NICD/NIMH BATTERY

CHARGING OF NICD/NIMH BATTERY

This program is for charging of NiCd/NiMH
batteries associated with R/C models
applications. You can press START/ENTER
key to make it blink and then INC or DEC to
change the parameter value. Press
START/ENTER key to store the value.

NIMH CHARGE Aut
CUR LIMIT 5.0A

INCDEC

-

+

INCDEC

-

+

Batt type
Stop

Start
Enter

‘>3 seconds’

The screen shows the real-time status.
Press BATT TYPE/STOP key to end the
program. The sound will emitted to indicates
the end of program.

NIMH 2.0A 7.42V
CHG 022:45 00890

Battery
type

Elapsed
time

Charge current

Battery
voltage

Charged capacity

This program charge the battery using the current you set up. In the
“auto” state, you should set up the upper limit of the charge current to
avoid damage by excessive feeding current. Some batteries of low
resistance and capacity can lead to higher current in the “auto”
charging mode. But in the manual mode, it will charge with the
current you set. You can make it blink in the current field and press
INC and DEC simultaneously to swap between Auto and Manual
Mode. NOTE: Allowable fast charge current: 1C-2C

CHARGING NICD/NIMH BATTERY IN THE CHARGE MODE

DISCHARGE OF NICD/NIMH BATTERY

Set charge current on the left and the final
voltage on the right. Range of the charge
current is 0.1-1.0A; range of final voltage is

0.1-25.0V. Press START/ENTER key for
more than 3 seconds to start the program.

NIMH DISCHARGE

1.0A 11.5A

INCDEC

-

+

INCDEC

-

+

Batt type
Stop

Start
Enter

‘>3 seconds’

The screen indicates the discharging state.
You can press START/ENTER key to alter
discharge current. Press START/ENTER
again to store the value. Press BATT
TYPE/STOP key to stop discharging. The
emitted sound alerts the end of discharging.

NIMH 1.0A 7.42V
DSC 022:45 00890

Battery
type

Elapsed
time

Discharge
current

Battery
voltage

Discharged
capacity

- 21 -

NIMH CYCLE
DCHG>CHG 3

INCDEC

-

+

INCDEC

-

+

Batt type
Stop

Start
Enter

‘>3 seconds’

NIMH 1.0A 7.42V
D>C 022:45 00890

DCHG 1 1314mAh
CHG 1 1430mAh

Battery
type

Elapsed
time

Discharge
or charge
current

Battery
voltage

Discharged
or charged
capacity

CHARGE/DISCHARGE AND DISCHARGE/CHARGE CYCLE
OF NICD/NIMH BATTERY

CHARGE/DISCHARGE AND DISCHARGE/CHARGE CYCLE
OF NICD/NIMH BATTERY

You can set up sequence on the left and the
number of cycles on the right. Range of the
cycle number is 1-5.

Press BATT TYPE/STOP key to stop
program, you can press START/ENTER key
to alter charge current. The sound indicates
the end of program.

When it approaches to the end, you can see
the capacity of the battery being charged or
discharged. You can press INC or DEC key
to display result of each cycle.

CHARGING OF THE PB BATTERY

Set up the charge current on the left and
nominal voltage on the right. Range of
current is 0.1-5.0A, the voltage should
match the battery being charged. Press
START/ENTER key for more than 3 seconds
to start charging.

Pb CHARGE

4.0A 12.0V(6P)

INCDEC

-

+

INCDEC

-

+

Batt type
Stop

Start
Enter

‘>3 seconds’

The screen displays the real-time
discharging status. Press START/ENTER
key to alter discharge current. Press
START/ENTER key again to store the
parameter value you set. Press BATT
TYPE/STOP key to end the program.

Pb-6 4.0A 12.59V
CHG 022:43 00682

Battery
type

Elapsed
time

Charge
current

Battery
voltage

Charged
capacity

- 22 -

This program is only suitable for charging Pb (lead-acid) battery with
nominal voltage from 2 to 20V. Pb˄lead-acid˅battery is completely
different from NiCd/NiMH battery. These batteries can only deliver
current lower in comparison to their capacity. The same restriction
applies to the charging process. Consequently, the optimum charge
current can only be 1/10 of the capacity. Pb battery can not be used
for fast-charging, please follow the instructions provided by the
battery manufacturer.

Due to the chemistry characteristic of Pb battery, the cut off point
may be difficult to detect sometimes. We recommend user to use
CAPACITY CUT OFF feature to protect the battery.

You can press START/ENTER key to make it blink and alter the
value of parameters using INC or DEC key, press START/ENTER
key to store the value.

CHARGING PB (LEAD-ACID) BATTERY IN THE CHARGE MODE

CHARGING PB (LEAD-ACID) BATTERY IN THE CHARGE MODE

Set up the charge current on the left and
nominal voltage on the right. Range of
discharge current is 0.1-1.0A, the voltage
should match the battery being charged.
Press START/ENTER key for more than 3
seconds to start charging.

DISCHARGING OF THE PB BATTERY

The screen displays the real-time
discharging status. Press START/ENTER
key to alter discharge current. Press
START/ENTER key again to store the
parameter value you set. Press BATT
TYPE/STOP key to end the program.

Pb DISCHARGE

1.0A 12.0V(6P)

INCDEC

-

+

INCDEC

-

+

Batt type
Stop

Start
Enter

‘>3 seconds’

Pb-6 4.0A 12.59V
DCS 022:43 00682

Battery
type

Elapsed
time

Discharge
current

Battery
voltage

Discharged
capacity

- 23 -

DISCHARGING OF THE PB BATTERY

PROGRAM SELECT
SAVE DATA

SAVE [01] NiMH

14.4V 3000mHh

NiMH CHARGE At*
CUR LIMIT 5.0A

NiMH DISCHARGE*

1.0A 11.0V

NiMH CYCLE *
DCHG>CHG 3

Save ...

DATA STORAGE PROGRAM

INCDEC

INCDEC

INCDEC

-

+

INCDEC

-

+

INCDEC

-

+

INCDEC

-

+

INCDEC

-

+

Batt type
Stop

Start
Enter

Start
Enter

Start
Enter

‘>3 seconds’

‘>3 seconds’

Voltage Data

number

Capacity

Type of
battery

For your convenience, e6680 has a data storage and load program.
It can store five battery data representing the respective specifications
of batteries. You can call back the data when charging or discharging
without setting up the program again. Press START/ENTER key to
make it blink, and use INC or DEC to set up the parameter.

Setting of the parameter in the screen will
not affect the charge and discharge process.
They just present the specification of the
battery. The example is NiMH battery pack,
including 12 cells, the capacity is 3000m Ah.

Set up the charge current in the manual
mode, or current limit in the auto mode.
Press INC and DEC key simultaneously to
make the current field blink to switch the
charge mode.

Set up the discharge current and final voltage.

Set up the charge/ discharge sequence and
cycle number.

Saving the data.

- 24 -

LOAD DATA PROGRAM

PROGRAM SELECT
LOAD DATA

LOAD [01] NiMH

14.4V 3000mHh

Load ...

LOAD DATA PROGRAM

Start
Enter

Start
Enter

‘>3 seconds’

This program is to load the data stored at the “save data” program.
Press START/ENTER key to make the data field blink and press INC
or DEC for more than 3 seconds to load the data.

Choose the data number you want to call
back. The data you want to call back will be
displayed.

Loading the data.

- 25 -

End Voltage

12.6V(3S)

Capacity Cut-Off
ON 5000mAh

Safety Timer
ON 200min

Temp. Cut-Off
ON 80C 176F

Ext.Temp 26C

4.14 4.16 4.09

0.00 0.00 0.00

VARIOUS INFORMATION IN THE PROGRAM

VARIOUS INFORMATION IN THE PROGRAM

You can inquire various information on the LCD screen during the
charging and discharging process. Press DEC key, the charger will
display users' setting. You can press INC key to monitor voltage of
each cell while the battery is connected with each port of the charger.

It comes to the final voltage when the
program ended.

Displayed capacity cut-off function is turn on
and the setting value of capacity.

Displayed safety timer is turn on and duration
of time in minutes.

Displayed temperature cut-off function is turn
on.

The external temperature is displayed when
the temperature probe is used.

The battery is connected with each port
through cable; you can check voltage of
each cell in the battery pack. When the cable
is connected with the ports on the charger,
the program will display voltage of up to 6
batteries.

DEC

DEC

DEC

DEC

DEC

- 26 -

REVERSE POLARITY

WARNING AND ERROR MESSAGE

WARNING AND ERROR MESSAGE

e6680 incorporates a variety of functions for the systems to verify
processes and the state of the electronics. In case of an error the
screen will display the cause of error and emit an audible sound.

Incorrect polarity connected.

Battery connection is interrupted.

Short-circuit of the output termination.

Input voltage incorrect.

The voltage of the battery pack has been
selected incorrectly!

The charger has malfunctioned for some
reason. Seek professional advice.

The voltage is lower than which is set.
Please check the number of cells in the
battery pack.

BATTERY CHECK
LOW VOLTAGE

BREAK DOWN

VOL SELECT ERR

INPUT VOL ERR

SHORT ERR

CONNECTION BREAK

The voltage is higher than which is set.
Please check the number of cells in the
battery pack.

Voltage of one cell in the battery pack is too
low, please check the voltage of each cell.

Voltage of one cell in the battery pack is too
high; please check the voltage of each cell.

Wrong connection of the connector detected;
please check the connector and cable.

The internal temperature is too high, please
cool down.

The processor cannot control the feeding
current, please repair it.

BATTERY CHECK
HIGH VOLTAGE

BATTERY VOLTAGE
CELL LOW VOL

BATTERY VOLTAGE
CELL HIGH VOL

BATTERY VOL ERR
CELL CONNECT

TEMP OVER ERR

CONTROL FAILURE

- 27 -

SPECIFICATIONS

SPECIFICATIONS

AC Input: 100-240V (100W-90W)
DC Input: 11-18V
Circuit Power: Max. Charge Power 80W
Max. Discharge Power 10W
Charge Current Range: 0.1-6.0A
Discharge Current Range: 0.1-2.0A
Current Drain For Balancing LiPo: 300mA/cell
NiCd/NiMH Battery Cell Count: 1-15Cells
LiPo/LiFe/Lilon Cell Count: 1-6Cells
Pb battery voltage: 2-20V
Net Weight: 490g
Dimension: 135x112x60.9mm

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 t he time of purchase. During that period, we will repair or
replace free of service charge for products deemed defective due to
those causes.

You will be required to produce proof of purchase (invoice or receipt).
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.

SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.

Manufactured by
SKYRC TECHNOLOGY CO., LTD.
www.skyrc.com