21V 18650 Battery Protection Board 6MOS with Temperature Control

$7.83 $9.39

21V 18650 Battery Protection Board with Temperature Control & Side Indicator Lights

Keep your power tools running safely and efficiently with this 6MOS 3-Alloy 21V 18650 Battery Protection Board. Engineered for DIY enthusiasts and professionals alike, this compact protection board features built-in temperature control and convenient side indicator lights — giving you real-time feedback and reliable safeguarding for your 18650 lithium battery packs.

Made in Mainland China.

Key Features

6MOS 3-Alloy Design: Robust 6-MOSFET circuit using a 3-alloy configuration for stable, efficient power management and extended board lifespan.
21V Rated Voltage: Perfectly suited for 5-cell 18650 lithium battery packs commonly used in cordless power tools.
Temperature Control Protection: Integrated thermal sensor automatically monitors heat levels and cuts off power if the board gets too hot — helping prevent damage to your batteries and tools.
Side Indicator Lights: Built-in LED side lights provide a quick visual status check so you always know your battery system's condition at a glance.
Wide Compatibility: Designed to work with electric scissors, electric hammers, electric saws, angle grinders, and similar 21V cordless power tools.
Durable Metal Construction: Sturdy metallic build ensures lasting performance even in demanding workshop or job-site environments.
Home DIY Friendly: Straightforward design makes it easy to integrate into your existing battery packs for home or workshop projects.

Specifications

Voltage: 21V
Battery Compatibility: 18650 Lithium
MOSFET Count: 6MOS (3-Alloy)
Material: Metal
Features: Temperature Control, Side Indicator Lights
Applicable Tools: Electric Scissors, Electric Hammers, Electric Saws, Angle Grinders
Quantity: 1 × Protection Board

Package Includes

1 × 21V 18650 6MOS Battery Protection Board

Note: Colors may appear slightly different from product images due to monitor brightness and lighting conditions. Please refer to the actual product received.

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Frequently Asked Questions

Q: What power tools is this 21V 18650 protection board compatible with?

A: This 21V 18650 battery protection board is compatible with a wide range of cordless power tools, including electric scissors, electric hammers, electric saws, and angle grinders. Any 21V cordless tool using a 5-cell 18650 lithium battery pack is a suitable match.

Q: What does the temperature control feature do on this protection board?

A: The integrated temperature control sensor continuously monitors the board's operating temperature. If it exceeds a safe threshold during heavy use or charging, the circuit automatically cuts off power to prevent overheating — helping to protect both your battery cells and connected tools from damage.

Q: What do the side indicator lights on the board indicate?

A: The built-in LED side indicator lights provide a quick visual status of the battery protection board's operating condition. They allow you to confirm at a glance whether the board is active and functioning correctly, without needing additional testing equipment.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.