BMS 4 String 14.8V/8A

18650 Cell Lithium Battery Protection Board Current Peak 8A Over-Current Protection

125.00 EGP 125.0 EGP 125.00 EGP

125.00 EGP

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Internal Reference: BMS.4S.8A

4S 8A 14.8V 16.8V 18650 Lithium Battery Protection Board 4 Cells Li-ion Lipo Polymer Charger Protection BMS/PCM/PCB Module 


  • Size: 72 * 17 * 3.0mm
  • Overcharge voltage range: 4.25-4.35v ± 0
  • Over-discharge voltage range: 2.3-3.0v ± 0.05v
  • Upper limit working current: 6~8A
  • Upper limit instantaneous current: 12A
  • Quiescent current: less than 30uA
  • Internal resistance: less than 100mΩ
  • Charging voltage: 16.8V-17V
  • Operating temperature: -40 to +50 °
  • Storage conditions: -40 to +80 °
  • Effective life: more than 50,000 hours
  • Short circuit protection: can be protected, need to restore the charge
  • Protection board components: Components for the S-8254AA protection chip and AO4407 * 4.

Main function:

Overcharge protection, over-discharge protection function, short circuit protection function, over current protection function, balance. 

Important Cautions:

  1. Strictly according to the diagram wiring - do not make short circuit.
  2. After the wire is connected, it needs to charge the batteries first, then have output.
  3. When the battery is connected in series with 5 groups, please ensure that the voltage of each battery is the same. If not the same, please fill in each set of batteries and then use them.
  4. Do not mix the good battery and the bad battery.
  5. It will be better if the capacity of the battery's internal resistance is closer.