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  1. PCB (Circuit Board)
  2. PCM (21)
Protection
  1. short-circuit (5)
  2. over-temperature (1)
  3. over-current (5)
  4. over-discharge (21)
  5. over-charge (21)
Max. continuous discharge current
  1. 1 A
    5 A
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Constant charge current, max.
  1. 1 A
    5 A
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Length, max.
  1. 37mm
    69mm
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  1. 21mm
    28mm
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  1. 4mm
    8mm
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Lithium-ion Battery Forum

PCM

A PCM (protection circuit module) is a type of PCB (circuit board) intended for use in a simple lithium ion battery pack. A larger, more complicated battery pack PCB is called a BMS (battery management system).

The PCM can offer the li-ion battery pack protection against over-temperature, over-current, over-discharge, over-charge, and short-circuit. A PCM comes in a variety of shapes and sizes to fit powerbanks, flashlights, and other electronic devices.

A protection circuit module is commonly used when building an 18650 battery pack to keep the cells in safe operating conditions.

   
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