5S 21V 25A Battery Protection Board for Makita Lithium Battery Pack

Keep your battery safe and working longer. This 5S battery protection board helps control charging and discharging to prevent damage. It is designed for Makita-style batteries and works with 21V lithium packs. With built-in lithium battery protection circuit, it protects against overcharge, over-discharge, and short circuits. A simple and reliable solution for DIY battery repair or upgrades.

Key Features
• Protects against overcharge, over-discharge, and short circuit
• Supports 5S (5-cell) lithium battery packs for 18V–21V systems
• 25A continuous current for power tools and high-load devices
• Stable performance with real-time voltage monitoring

Why Choose This Board
It’s a simple upgrade for better battery safety. Compared to basic boards, it offers more protection and stable performance, especially for power tools.

Perfect For
DIY battery packs, Makita battery repair, power tools, and custom lithium projects.

Product Specs
Type: 5S BMS
Voltage: 21V
Current: 25A
Use: Lithium-ion battery protection

Protect Your Battery the Smart Way
Avoid damage and extend battery life with a simple protection board that keeps everything running safely.