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Protection Circuit Module (PCB) for 11.1V Li-Ion (4A Limit) - For 18650/18500 3S1P battery pack (#3781)

Your Price: $6.50
Lead Time: 6-7 weeks

Product ID # 3781
Part Number:

10 pcs minimum order

Quantity Discounts

5 to 20$6.30
21 to 50$6.17
51 to 100$6.04
101 or more$5.85
 Protection Circuit Board Specifications  For 11.1V Li-ion/Li-po Battery Pack 
Model: PCM-LI3S4A - Separated charge/discharge points
No. Test   item Criterion
1 Voltage Charging voltage DC: 12.6V CC/CV (4.2V/1cell)
Balance voltage for single cell N/A
2 Current Balance current for single cell N/A
Current consumption for single cell ≤50μA
Maximal continuous Charging current 4A
Maximal continuous discharging current 4A
3 Over charge Protection
(single cell)
Over charge detection voltage 4.325±0.025V
Over charge detection delay time 0.3S-2S
Over charge release voltage 4.15±0.05V
4 Over discharge protection
(single cell)
Over discharge detection voltage 2.40±0.08V
Over discharge detection delay time 300-2000mS
Over discharge release voltage 3.0±0.10V
5 Over current protection Over current detection voltage 150±25mV
Over current detection current 7.5±1.5A
Detection delay time   30ms-200ms
Release condition Cut load
6 Short protection Detection condition Exterior short circuit
Detection delay time 200-600us
Release condition Cut load
7 Resistance Protection  circuitry(B- TO P-) ≤50mΩ
8 Temperature Operating Temperature Range -40~+85℃
Storage Temperature Range -40~+125℃
9 Dimenstion LxWxT 50x16x3 mm
10 Specification in pdf file Download the specification  

 For other PCM/PCB, please check our PCM/PCB/BMS/CMB/UPS category


  • If you want to use this protection circuit board for a battery that is less than the rated drain, you must add additional protection device to protect the battery itself. Such as: proper rated polyswitch. 
  • You must be professional in Lithium battery pack to buy the protection circuit board. Misusing may cause battery damage or explode. We are not responsible for any damage caused by user.

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