21V BMS 5S 15A 18650 Lithium Battery Protection board

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BMS (Battery Management System) a battery management system that is designed to monitor the status of batteries, control the process of charging/discharging the battery etc.
Five batteries (18650) can be connected simultaneously to this charge-discharge controller module. The module has protection against short circuit, overcharge and over-discharge. One of the functions of the charge controller is to turn off the power supply for the batteries when the maximum capacity of at least one battery is reached. This BMS controller is designed for more than 30,000 hours of operation. The maximum allowable current is 15 A.


  1. Small size designed for a Five-cell battery pack.
  2. Simple and convenient circuit for easy connections
  3. Over-charge/Over-discharge Protection
Model 21V BMS 5S 15A
Type Lithium Battery Protection board
Charge Voltage 21 V
Charging current 15A
Continuous discharge current  15A
Instantaneous discharge current 25A
Over charge detect 4.28V +- 0.05v
Working current ≤30uA
Country of Origin China



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