PowerGuard 5S 21V 25A Lithium Battery Protection Board – Makita-Compatible BMS Module

Keep your power tools running safely and efficiently with a smart layer of protection you can trust. This 5S 21V battery protection board is designed for DIY builders, repair technicians, and anyone working with lithium battery packs. It helps prevent damage caused by overcharging, overheating, and short circuits while maintaining stable performance. Compact yet powerful, it ensures your battery system stays reliable under heavy use. A must-have component for safer, longer-lasting power.

Key Features

• Intelligent BMS protection board 21V monitors voltage, current, and temperature in real time
• Supports 5S lithium battery packs with stable 21V output
• Built-in safety protections: overcharge, over-discharge, overcurrent, and short circuit
• High 25A discharge capacity suitable for power tools and high-load devices

Why Choose Our PowerGuard 5S 21V 25A Lithium Battery Protection Board
Unlike generic modules, this Makita battery protection board is designed for higher performance and safer operation in demanding applications. It delivers consistent protection across all cells, helping extend battery life and reduce failure risks. Compared to low-quality boards, it offers more stable output and better durability under continuous use.

Perfect For (Occasions & Uses)

• Rebuilding or repairing Makita-style battery packs
• DIY lithium battery projects (18650/21700 cells)
• Power tools and high-drain devices
• Technicians, hobbyists, and electronics enthusiasts

How to Use
Connect the board to your 5S lithium battery pack, ensuring correct wiring for each cell. The module will automatically manage and protect the battery during charging and discharging.

Product Specs

• Configuration: 5S (5 cells in series)
• Voltage: 21V
• Current: 25A
• Battery Type: Lithium-ion (18650/21700)
• Protection: Overcharge, over-discharge, overcurrent, short circuit

Build Smarter, Power Safer
Upgrade your setup with a lithium battery protection circuit board that keeps your system stable and secure. Add it to your project today and enjoy safer, more reliable performance.