Protection Circuit Module [PCB] for 11.1v (3S) Li-ion Battery Pack (Working 3A, Cutoff 15A)

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Sale Price: $9.99
Item Number: 32107

Quantity Discounts

5 to 10$9.59
11 to 20$9.49
21 to 59$9.39
60 to 99$9.29
100 or more$9.19

Features and Benefits:

  • Protection Circuit Board for 11.1V Li-ion and Li-polymer battery pack.
  • Designed for 11.1V Li-ion or Li-Polymer battery.
  • Prevents 11.1V Li-ion or Li-polymer battery from over-charging / over-discharging.
  • Continuous Discharge Current: 3A.
  • Fully Compatible with both Li-Ion and Li-Polymer cells.
  • RoHS Compatible.

Connection Instruction:

  • B+: Connected to the third battery's positive terminal.
  • B1-: Connected to the second battery's positive terminal.
  • B2-: Connected to first the battery's positive terminal.
  • B-: Connected to the first battery's negative terminal.

  • P+: Connected to the battery's output or the charger's positive terminal.
  • P-: Connected to the battery's output or the charger's negative terminal.

Technical Specifications:

Item Content Criteria
Over Charge Protection Over Charge Detection Voltage 4.35±0.025V
Over Charge Release Voltage 4.15±0.05V
Over Discharge Protection Over Discharge Detection Voltage 2.4±0.08V
Over Discharge Release Voltage 3.0±0.15V
Rated Operational Current 3A
Over Current Protection Over Current Detection Current 15±1A
Release Condition Cut Load
Detection Delay Time 5~15ms
Short Circuit Protection Short Protection Implemented
Release Condition Cut Short Circuit
Interior Resistance Main Loop Conduction Resistance 50-100mΩ
Current Consumption Current Consumed in normal Operation 35μA Max
Dimension 50 x 16 x 1.1 mm

Application Notes

  • Do not subject the PCB to input voltage over 20V. Input voltage over 20V will damage the PCB.
  • Please use the compatible charger for your battery pack; pay special attention to your input and output voltage current to avoid PCB damage.
  • When mixing over-charged batteries and over-discharged batteries together, PCB will be in dual state of over-charging and over-discharging. In this situation, charging and dis-charging are both disabled.
  • Internal static charge protection circuit built into the PCB. However, do not subject the PCB to high static charge to avoid damage.
  • Without the written agreement from us, please do not use this PCB for application in medical instruments, emergence devices, auto, airspace vehicles, or other devices that might have impact on human body.


Because of the very high energy density, Li-ion battery pack must be connected to a protection circuit module to prevent accidental battery explosion caused by over-charging or over-discharging.

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