Battery Management System

     3s~4s Protection Board
     5s~9s Protection Board
     10s~16s Protection Board
     17s~32s Protection Board

    Charger and Adapter

     Li-ion/Polymer/LiFePO4 Charger
     Lead-Acid Battery Charger
    Nihm Battery Charger
     DC-DC Battery Charger
    AC/DC Adapter

    Lithium Battery Pack

     2s~3s Lithium Battery Pack
     4s~6s Lithium Battery Pack
     7s~10s Lithium Battery Pack
     11s~20s Lithium Battery Pack


   Contact Information:


Mobile: +86-13632959016

   Tel: +86-755-23120816(10 lines)
   Fax: +86-755-23120816

20S5P 18650 72V Li-ion Battery Pack

Model Number: WMP-L20S5P

Item Specification Remark
Nominal capacity 14500mAh Samsung cell  18650-29E
Nominal voltage 72v 3.6v / cell
Charging voltage 84v0.5v 4.2v / cell
Charging method CC / CV Constant current and voltage with limited current
Standard charging time 5000mA/3.5hrs, 8000mA/2.5hrs Battery capacity / charging current x 1.5
Charging current 7250mA(0.5C) 0 ~ +40
Max charging current 14500mA(1C) 0 ~ +40
Continuous discharging current 25000mA(2C) -20 ~ +60
Discharge cutoff voltage 50v 2.5v / cell
Short circuit protection Exterior short circuit Auto recovery
Internal resistance 200mΩ AC impedance 1kHz
Cycle life 500
Operating temperature Standard charge 0 ~ +40
Standard discharge -20 ~ +60
Dimension size L420 x W100 x T70 Length x Wide x Thickness
Pre - wired Red = Positive, Black = Negative
Protection Circuit Module : WMB-L24S60-622
Max continuous charging current 10A
Max continuous discharging current 30A
Over-charge detection voltage 4.25v 0.025v Single cell
Over-charge release voltage 4.15v 0.05v Single cell
Over-charger detection delay time 0.5s ~2s Single cell
Over-discharge detection voltage 2.5v 0.062v Single cell
Over-discharge release voltage 3.0v 0.01v Single cell
Over-discharge release delay time 50 ~150mS Single cell
Over-current detection 50A 10A Adjustable
Over-current delay time 5 ~ 20mS
Company Address: Second Floor, D Building, An Le Industrial Park, Hang Cheng Road,  Xi Xiang Township, BaoAn District, Shenzhen, 518126, China.
Tel: +86-755-23120816, Fax: +86-755-23120816, E-mail:
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