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Keep your power tool batteries operating safely and efficiently with this reliable Lithium battery protection board designed for 5S 21V battery packs. Built to support stable charging and discharge performance, this compact protection module helps improve battery safety by reducing the risk of overcharging, over-discharging, short circuits, and excessive current flow. Designed for compatibility with Makita-style power tool battery systems, it provides dependable performance for DIY battery projects, repairs, and maintenance. The durable circuit board construction offers stable operation while remaining compact and easy to install. Whether for battery replacement projects or custom battery pack builds, this 5S 21V BMS board delivers practical battery management support.


Key Features

  • Supports 5S 21V lithium battery pack protection
  • Helps prevent overcharge, over-discharge, and short circuits
  • Stable 25A current handling for reliable performance
  • Compact module design for convenient installation

Why Choose Our 5S 21V Battery Protection Board
Unlike basic battery circuits, this Makita battery protection module provides enhanced safety and battery management for improved performance and longer battery reliability. Its compact and durable design makes it suitable for DIY repairs, battery rebuilding, and power tool maintenance.

Perfect For

  • Makita-compatible power tool battery packs
  • DIY battery repair and replacement projects
  • Lithium battery maintenance and upgrades
  • Electronics and battery management applications

Product Specs

  • Battery Type: 5S 21V lithium battery pack
  • Current Support: 25A
  • Function: Charging and protection management
  • Compact circuit board module design

Improve Battery Safety and Performance

Upgrade your battery pack setup with reliable charging and protection support designed for power tool applications. Keep your lithium batteries safer and operating more efficiently with this practical protection board module.

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