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K-3980 Battery Load Bank

Kongter offers a series of customized DC load banks with many different models for constant current battery discharge test and battery capacity test. They cover a wide voltage range from 12V to 480V nominal voltages with current up to 600A. They are widely applied in various industries. With its optional battery Data Acquisition Case (DAC), discharge values of EACH cell could be monitored in battery load bank and PC software simultaneously by using Kongter’s data view software.

For quick test of battery condition, please refer to BT-301 Battery Condition Analyzer which tests battery interal resistance/conductance in seconds.

K-3980 battery load bank-general info-Catalog
K-3980 battery load bank-datesheet for all models



Optional Data Acquisition Case (DAC)
Each DAC is recording voltage of up to 12 cells. It has wireless communication with K-3980 battery load bank main unit and PC. And it is capable to measure all type of batteries (1.2V, 2V, 6V & 12V). Kongter also offers customized DAC for other battery types.

DAC numbers are easily expandable to cover more battery volumes.


Its Connection>>:
One DAC could be connected with 12 cells of 1.2V, 2V or 4 cells of 12V (or 6V). Therefore, in different battery systems, they require different amount of DACs during battery discharge test. With DAC, K3980 and Kongter PC software will be able to monitor and record voltage of each cell together with other parameter like String Voltage, Current, Discharge Capacity and so on.

Connection with 1.2V or 2V cells:

Connection with 6V or 12V cells:


Kongter PC Software
All standard battery load bank units of K3980 come with PC software. With the software, you have a real-time data monitoring, analyze the testing data and easily print out the complete report.

Kongter battery load banks/DC load banks are best solutions for battery capacity testing to view real capacity of battery.

  • Optional wireless DAC enables real-time PC monitor during measurement
  • It sets 4 conditions for discharge auto shut-down:
    Discharge time, discharge capacity, string voltage and cell voltage
  • Continued discharge available when previous discharge is stop abnormally
  • Parallel connection of two units for higher discharge current
  • Assistant discharge to add load to even non-Kongter load banks
  • Can monitor measurement of other load banks or battery charger
  • Accurate data measurement and vivid waveforms of PC software
  • Auto sorting for lag-out batteries during discharge
  • Safe circuits avoids damage to battery during measurement
  • Powerful management software for data analysis and report generation
  • Automatic protection upon over-heating and overload
Power supply1). AC 220V/110V, 50/60Hz;
2). DC (from batteries, optional for some models)
Cell type1). Standard: 1.2V­1, 2V, 6V and 12V
2). Customized: 12V ONLY or other uncommon battery types.
Discharge voltage range10V-552V
Customized as nominal voltages of 12V, 24V, 48V, 72V, 80V, 110V, 120V, 220V, 240V, 380V and 480V. 
Discharge current rangeSingle load bank: 10A-600A
Parallel load: 10A-1200A
Current is customized per different string voltage
AccuracyCurrent: 1%
Voltage: 0.5% – 0.8%
ResolutionCurrent: 0.1 A or 0.5%
Voltage: 0.001 V
Sampling Interval5s –1min
Discharge patternConstant current
Display128*64 pixel LCD
Data transferUSB, Radio Frequency (for DAC to load bank)
Operation Temperature0℃~40℃ (32 – 104 °F)
Humidity5%~90% Relative humidity
StandardCE marking, EMC standard
Main Unit Dimension2S: 400 x 177 x 288 mm (15.7 x 7 x 11.3 in)
M: 520 x 202 x 355 mm (20.5 x 8 x 14 in)
L: 555 x 225 x 435 mm (22.5 x 8.9 x 17.2 in)
XL: 603 x 400 x 740 mm (23.7 x 15.7 x 29 in)
XXL:762 x 406 x 737 mm (30 x 16 x 29 in)
Main unit WeightS: 11 kg (24 lbs)
M: 16 kg (36 lbs)
L: 21 kg (47 lbs)
XL: 42 kg (93 lbs)
XXL: 55 kg (122 lbs)


  1. Quantity of DAC and cable in standard DAC package are based on 2V, 6V and 12V. For measurement of 1.2V Ni-cd batteries, you will require some more DACs and relevant cables.
  2. Measurement range, dimension and weight vary depending on different models. Please confirm with our sales representative upon orders.
  3. This is just general specification of K-3980 series battery load bank. For detailed specification of each load unit, please click HERE.
    Kongter battery load banks/DC load banks enjoy unique features for battery capacity testing.

Q: What industries is the battery load bank applied for?
A: Kongter covers various industries with its wide range customer-tailored battery/DC load bank models. It includes telecom, power utility, data center, forklift battery maintenance, industries manufacturing and many others. For details, please download the catalog. 

Q: Can I test the battery systems in short time?
A: Depending on different regulations, you could alternatively discharge batteries based on C5, C10 or C20. Shorter discharge time will require higher discharge current for the same unit. Kongter also offer some customized load units with high discharge current. For details, please contact us with your requirement. 
For quick test of batteries to pick up weak batteries from whole string, we will also recommend BT-301 Battery Condition Analyzer for measurement of both battery internal resistance and conductance. Test  can be done in seconds. 

Q: How do I record voltage of each cell in the string effectively?
A: Kongter offers optional Data Acquisition Case (DAC) for each load bank model for recording voltage of each cell in real time during battery load test. With DAC, you could also use the PC software to monitor all measurement data during battery discharge.

Q: What voltage rating does the DAC support?
A: Standard DAC is designed for measurement of 2V, 6V and 12V cells with connection of up to 12 cells each DAC. Kongter also offers customized model for recording of 1.2V, 12V only and other non-standard cell types including lithium batteries.

Q: Can I use PC software for data monitoring if there is no DAC with my load bank?
A: Yes, you can. However, you will not see voltage of each cell. And all measurement data is saved in the load bank automatically even if there is no connection with PC. You could also view the data in load bank during discharge.

Q: If I do not have DAC, what battery type can I discharge?
A: You could discharge any type of battery if there is no DAC. Just set the battery number as ZERO in the menu.

Q: Can the DAC work independently without load bank?
A: Yes, it can. And also it can work along with String DAC to make another product, the BDL-3926C Battery Data Logger.

Q: Can Kongter’s load bank work with non-Kongter load banks?
A: Yes, if you have requirement to discharge higher current than max current of non-Kongter load bank, you could use “Assistant discharge” function of Kongter load bank to increase discharge current.

Q: How do I use Kongter’s load bank to discharge at higher current?
A: Besides using another customized load model with higher current, you could also use parallel discharge of two units to increase the discharge current.

Q: I am a contracting company, can I have one single load model with wide voltage range for different industries?
A: Yes, Kongter offers load models of LB-2348 and LB-2415 with wide voltage range. If you have different requirement, you could also contact us with your requirement. Click HERE for helpful guideline on how to select the right load bank model.

Q: In the datasheet, I see that most load bank models can discharge down to10V. Does that mean that all load banks can discharge in wide voltage ranges?
A: All load banks can discharge as low as 10V. However, the discharge current at 10V will be pretty small for most models. If you have requirement to discharge at higher current in low voltage, you are suggested to send Kongter your detailed requirement including string nominal voltage and discharge current for each string. If you have different strings to discharge, list all of them.

Click HERE for helpful suggestions on how to select your right battery load bank models.
Kongter provide best support for its battery load bank/battery capacity tester, you are welcome to contact us for questions regarding battery load bank.

Standard parts:

  • Main unit of load bank
  • Data View software
  • Carrying case (for small & medium size models)
  • Set of 3m/10ft load cables
  • 3m/10ft voltage test leads
  • PC communication terminal
  • Ground cable
  • AC Power cord
  • USB with backup info
  • Antenna


  • DAC package
  • Current clamp for external loads
  • Parallel load cable

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