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Battery Charger BT-C2000 - OPERATING INSTRUCTIONS
1. Intended Use
The charger is intended to charge and discharge NiCd or NiMH chemistry rechargeable batteries
only. It provides four independent charging slots for AA or AAA rechargeable batteries. The
included adapters provide the additional ability for C & D size rechargeable batteries. The charger
can also test and optimize the maximum capacity of the rechargeable batteries. Each charging slot
has its own display to show various information such as, charging current, battery voltage, charged
capacity, discharged capacity, battery internal resistance and time. Second generation hardware
including Delta-Sigma 16 bit ADC provides improved charging circuit performance and thermal
management.
The charger can charge or test batteries of different type, different size, and different capacity at
the same time. Each charging slot may be programmed with a different working mode and current
parameters if desired. When charging is complete FULL will show in that channel display then the
maintenance charge is started automatically.
This product fulfills European and national requirements related to electromagnetic compatibility
(EMC). CE conformity has been verified and the relevant statements are available upon request.
Unauthorized conversion or modification of the charger is prohibited and voids the manufacturer's
warranty. Any usage other than described above is not permitted and can damage the product and
lead to associated risks such as short-circuit, fire, electric shock, etc. Please read the operating
instructions thoroughly and keep them for future reference.
2. Safety Instructions
The manufacturer assumes no liability for damages to property or personal injury if the product
has been abused, modified or damaged by improper use or failure to observe these operating
instructions.
2.1 Product Safety
§ The product must not be exposed to substantial mechanical strain or strong vibrations.
§ Do not operate the charger if it appears damaged in any way.
§ The product must be protected against strong electromagnetic fields, static electrical fields,
extreme temperatures, direct sunlight and moisture.
§ The manufacturer’s instructions for the respective batteries must be observed. Ensure the
batteries can accept the programmed charge and discharge rates before attempting
charging.
§ The product should not be connected immediately after it has been brought from an area
of cold temperature to an area of warm temperature. Condensed water might cause
damage. Wait until the product adapts to the new ambient temperature before use.
§ The product is to be used only in an indoor dry environment.
§ Sufficient ventilation must be provided when operating the charger. Never cover the
ventilating slots of the charger. Ensure adequate ventilation for the batteries under charge.
Do not place the unit on the carpet as this can block ventilation slots on the charger
body. Operate only in a well-ventilated area.
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2.2 Battery Safety
§ Correct polarity must be observed while inserting the batteries. Always insert the battery
cells with the positive tip facing the top of the charger.
§ Non-rechargeable batteries, rechargeable alkaline batteries (RAM), lead acid batteries
and lithium batteries must not be charged with this product. There is danger of fire or
explosion!
§ Batteries should be removed from the device if it is not used for a long period of time to
avoid damage through leaking. Leaking or damaged batteries might cause chemical burns
when in contact with skin; therefore use suitable protective gloves to handle corrupted
batteries.
§ Batteries must be kept out of reach of children and pets.
§ Batteries must not be dismantled, short circuited or thrown into fire. Never allow battery
contacts to become shorted.
§ Use only NiMH or NiCd rechargeable batteries. Never recharge non-rechargeable batteries
due to risk of fire or explosion of the batteries.
3. Delivery Contents
Battery Charger BT-C2000 1 pc
Wall Power Adapter 1 pc
Operation Instructions 1 pc
C & D cell adapters 2 pc's
4. Operating Elements
5. Power Supply
The wall power adapter included is the main power supply for this charger. Only approved power
supplies may be used to power the BT-C2000 charger. The included power supply provides +12Vdc
at 1.0A It has a coaxial DC power plug, which inserts into the power jack on the rear of the charger
main unit, of 5mm OD, 2.1mm ID with center positive. The charger may be operated from
approved portable power adapters that supply the correct voltage and minimum current
requirements.
6. Operation
Upon initial power application the firmware revision level is displayed in the left most digits of the
display. After approximately one second all display segments are displayed for approximately two
seconds The “null” icon will then be shown for all channels until batteries are inserted. This
indicates that all internal self-tests passed and the charger is ready for use.
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Once a rechargeable battery is inserted, its instantaneous voltage will be displayed for 3 seconds.
Mode CHARGE and current value 400 mA will be displayed for another 3 seconds. If no button is
pressed during these 6 seconds, the charging process will start at the default value of 400 mA. Any
button press during this 6 second time will cause the charger to wait for another 10 seconds
before entering the working mode.
If no particular slot is selected by pressing the SLOT button, the MODE, DISPLAY and CURRENT
buttons refers to all 4 slots simultaneously. Flashing channel display indicates selection of that
channel. All four channel displays flashing indicates that MODE, DISPLAY and CURRENT buttons
refer to all four channels simultaneously. The charger display backlight turns on after each key
press and remains on for 30 seconds after the last key press.
6.1 MODE Selection
At least one rechargeable battery must be inserted in a channel in order to program the charger.
Press and hold the “MODE” button for 2 seconds to start mode selection for selected slots.
Press the MODE button subsequently at least one time to toggle among the working modes. Press
the MODE button until the desired working mode is shown in the selected channels.
The working mode may be changed any time while a battery is in the charger by pressing and
holding the MODE button for 2 seconds.
Working Modes:
CHARGE
DISCHARGE
DISCHARGE - REFRESH
CHARGE - TEST
QUICK TEST
CHARGE Mode
In the CHARGE mode the rechargeable battery is charged up to its maximum capacity at the
selected current. Charge termination or full charge is determined with a modified -dV (minus delta
voltage) algorithm. The proprietary modified algorithm ensures that full charge termination is
detected by the charger, even at low charge currents. Once full charge is detected the charger
enters a maintenance charge process supplying minimum charge to the cell so that it remains at
full capacity until ready to use.
Note: When attempting to charge cells with high impedance, the charger will not reject the cells
as with some other chargers. Instead the cell will be charged at a reduced current from the
programmed setting. This will allow charging of high resistance cells so that they may be cycled to
improve their capacity and internal resistance.
Example: Insert battery into a slot. CHARGE will flash in that channel display. Press CURRENT
button to select 200, 400, 600, 800, 1000, (1200 or 1400) mA for the charge rate.
If CURRENT button is not pressed the current will automatically default to 400 mA.
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DISCHARGE Mode
In the DISCHARGE mode the rechargeable battery is discharged to a preset battery voltage (0.9V)
then discharged is terminated. At discharge termination 0 mA current is displayed in that channel
display. Press the DISPLAY button to view discharged capacity.
Example: Insert battery into a slot. Press MODE button until DISCHARGE is displayed.
Press CURRENT button to select 100, 200, 300, 400, or 500, (600 or 700) mA discharge rate.
If CURRENT button is not pressed the discharge current will automatically default to 200 mA.
DISCHARGE - REFRESH Mode
In the DISCHARGE-REFRESH mode the rechargeable battery is discharged then charged repeatedly
to optimize to its maximum capacity. Old rechargeable batteries or rechargeable batteries that
have not been used for a long period of time can be restored with this mode. Depending on the
selected discharge and charge current, it can take tens of hours for completion. Refresh mode will
make 3 complete discharge-charge working cycles. When the discharge-charge cycles are
complete FULL will be displayed in the channel display.
Example: Insert battery into a slot. Press the MODE button until DISCHARGE-REFRESH is
displayed. Press the current button for 100, 200, 300, 400, 500, (600 or 700) mA discharge rate.
If the CURRENT button is not pressed the discharge current will automatically default to 200 mA.
CHARGE - TEST Mode
The CHARGE-TEST mode tests the present capacity of a rechargeable battery. The maximum
capacity is determined by first fully charging the battery, then discharging the battery while
measuring discharge current and time. The battery is then charged to full. After completion of the
CHARGE-TEST mode, tested battery capacity is displayed in mAh or AH alternating with the FULL
indication.
Example: Insert battery into a slot. Press the MODE button until CHARGE-TEST is displayed in
that channel. Press the CURRENT button to select 200, 400, 600, 800, 1000, (1200 or 1400)
charge rate. If CURRENT button is not pressed the current will automatically default to 400 mA.
QUICK TEST Mode
The charger will analyze the dynamic internal battery resistance by applying a load current and this
current reading is referred to the voltage drop detected on the battery. Within 10 seconds the
tested battery resistance will be displayed in the unit of milliohms (thousandths of an ohm). Only
fully charged batteries should be tested for internal resistance. Please note that the internal
battery resistance can be very small, and contact resistance can be a major factor; thus with the
same battery tested in a different slot or even in the same slot with different contact conditions,
measurements can vary by up to 20%.
Example: Insert battery into a slot. Press the MODE button until QUICK TEST is displayed in that
channel. This symbol will appear in that channel -- --. Wait for a number or numbers to appear in
place of the symbol -- --; this may take 30 seconds or longer. This will be the battery internal
resistance in milliohms. A reading of 55 represents 55 milliohms or 0.055 ohms.
NOTE: Due to greater contact resistance, measuring internal resistance of high capacity C and D
cells with the included C&D to AA adapters is unreliable. Typically internal resistance of high
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capacity C and D cells is very low. In this case contact resistance is much greater than the internal
resistance of the cell. The added contact resistance of the adapter contacts renders the
measurement invalid.
6.2 CURRENT Selection
After the Mode is selected press the CURRENT button to toggle between available charge/
discharge current selections. Default charge current is 400 mA. Available selections are 200 mA,
400 mA, 600 mA, 1000 mA. If batteries are inserted in only slots 1 and 4 the charging current can
be further selected to 1200 mA or 1400 mA for channels 1 or 4. If charge current is selected to
1200 mA or 1400 mA for channels 1 or 4 and batteries are then inserted into slots 2 and 3, the
charge current in slots 1 or 4 will be reduced to 1000 mA maximum.
Discharge current is automatically selected at one half of the charge current. Maximum discharge
current is 500 mA. If battery slots 2 or 3 are not occupied then 600 or 700 mA discharge current
may be programmed for discharge current. However actual discharge current may be lower
depending on battery internal resistance.
6.3 DISPLAY Selection
Press the DISPLAY button to toggle among the display of Voltage, Current, Capacity and Time.
§ Charge/Discharge Current: the instantaneous current is displayed.
§ Time Elapsed: The charging/discharging time of the last cycle is displayed.
§ Accumulated Capacity: The accumulated charge or discharge capacity is displayed in mAh or Ah.
§ Voltage: The instantaneous battery voltage is displayed.
§ Quick Test: displays the measured internal battery resistance in milliohms.
§ Full: Battery full charge detected. After the rechargeable battery is fully charged maintenance
charging will be started automatically. Maintenance charging prevents the rechargeable
batteries from being overcharged when left in the charger and compensates for self-discharging
of the batteries. FULL will flash in the display when full charge is detected.
6.4 SLOT Selection
Pressing the SLOT button will start the slot selection process in the sequence: Slot 1, Slot 2, Slot 3,
Slot 4, All 4 Slots, and Exit. Flashing display segment indicates slot selection. If all four display slot
segments are flashing, this indicates all four slots selected. Mode and Current selection will then
be for the selected slots.
7. Temperature Monitoring
Battery temperature and charger internal temperature are monitored during operation. Battery
temperature of 60 degrees Celsius (140 degrees F) or controller board temperature of 77 degrees
Celsius (171 degrees F) will cause operation to be suspended. Four batteries are temperature
monitored individually. Two controller board sensors monitor charger internal temperature. If
controller board over temperature is detected, current will be suspended for the corresponding
two battery slots. If battery over temperature is detected only the affected channel current will be
suspended accordingly. The charging/discharging process will only resume once the temperature
of the batteries drops below 40 degrees Celsius (104 degrees F) or charger controller board
temperature drops below 50 degrees Celsius (122 degrees F) as appropriate.
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Monitored battery temperature may also modify the charge program selected. Delta T (the
temperature change) algorithm is not the primary algorithm for determining a battery full-charge
condition; however, temperature is measured and used to modify the charge profile in a
proprietary method. This ensures that battery temperature never approaches critical limits and
protects batteries from temperature extremes. As a fail-safe method battery temperature may
cause charge termination as a full charge event if other parameters are met as well.
8. Maintenance
The device is maintenance free but should be cleaned occasionally. When cleaning, the device
must be removed from any power source. Only use dry and soft cloth to clean the housing of the
charger Do not use abrasive or solvents.
Repairs may only be performed by authorized repair stations. Any repair or modification not
performed by an authorized repair station voids the manufacturer's warranty.
9. Disposal
9.1 Disposal of waste electrical and electronic equipment.
In order to preserve, protect and improve the quality of environment, protect human health and
utilize natural resources prudently and rationally, the user should return unserviceable product to
relevant facilities in accordance with statutory regulations. The crossed-out wheeled bin
indicates the product needs to be disposed separately and not as municipal waste.
Never dispose of batteries in a fire. Explosion and personal injury may result.
9.2 Used batteries/rechargeable batteries disposal.
Regulations require proper disposal of rechargeable batteries. Disposing used batteries in the
household waste is prohibited. Batteries containing hazardous substances are marked with the
crossed-out wheeled bin. The symbol indicates that the product is forbidden to be disposed via the
domestic refuse. Return used batteries to authorized recycling stations or used battery collection
center.
10. Technical Data
Operating Voltage
12V DC (10V min
16V max)
Power Adapter
Input: 100-240 V~, 50/60HZ
Output: 12V DC, 1.0A
Charging
Current range
200-
1400
mA
Discharge Current range 100 - 500 mA
Max. Charging Capacity 20,000 mAh (20 Ah)
Operating Temperature
0 to 40
°
C
[Poor quality picture omitted (of C&D adapters installed)]
One Year Limited Warranty
Support in North America - Email: support@datalucis.com
Manufactured by: Opus Instruments Co. Ltd, Shenzhen Guangdong, China
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