The protection board is for 5 series Li-ion batteries, mainly used for electric power tools.It uses special IC for 5S lithium batteries as processor to detect real-time voltage, charge and discharge current and ambient temperature of each battery. Stable various protective functions for charging and discharging, such as overcharge protection, over-discharge protection and short circuit protection. Enhanced Safety Features: Equipped with advanced charging protection to safeguard against overcharging, overheating, and short-circuiting, extending the life of your batteries. and Reliable: Crafted from high-quality materials, the motherboard offers durability and reliability for prolonged use, maintaining optimal performance of your power tools. Easy Installation: This circuit board is user-friendly with a straightforward installation process, making it ideal for both professionals and DIY enthusiasts. Color: As Shown Material: PCB Package Contents: 1 x Battery Protection Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.