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Powerizer Protection Circuit Module (PCB) for 3.6V / 3.7V Lithium Ion (Li-ion) 18650/18500 cell Batteries

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Battery Protection Circuit Module

This battery protection circuit module prevents the overcharging and over-discharging of a Li-ion battery pack. The PCB is compatible with both 18650 and 18500 sizes when building your own battery pack with raw cells. Li-ion batteries are extremely dense with power, which explains why they are becoming more and more popular for powering small, portable electronics. Though more popular, Li-ion cells require some additional care, which is especially true when building custom packs. This round battery protection circuit module is designed to limit a pack's maximum discharge to 2A. It is important that you match the PCB with the raw cell's discharge rate. Please note that positive and negative leads, as well as an insulator, are not included with your purchase.


  • Model: PCB-S1A2B
  • Over-charge Protection Voltage: 4.300V±0.050V
  • Over-discharge Protection Voltage: 2.40V±0.100V
  • Over-current Protection: 2.2~3.4A
  • Maximal Continuous Discharging Current: 2A
  • Maximal Current Consumption: 10uA
  • Short Circuit Protection: Automatic Recovery
  • Protection Circuitry Resistance: ≤65mΩ
  • Dimension:
    • Diameter - 0.551" (14 mm)
    • Depth - 0.0787" (2 mm)
  • Weight: 0.3 gram

Application Notes: We do NOT provide engineering support for this item. It is up to the purchaser to determine the suitability and manage the use of this product. If this product is modified (soldered onto) it cannot be returned.
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Powerizer Protection Circuit Module (PCB) for 3.6V / 3.7V Lithium Ion (Li-ion) 18650/18500 cell Batteries

  • $1.95
  • & Free Shipping On Orders Over $50
  • In Stock