This protection board is suitable for battery charging protection, mainly used for Dartek A3 power tools. It is equipped with a balancing circuit to detect the real-time voltage, charge and discharge current, and ambient temperature of each battery. Provides a variety of stable charge and discharge protection functions, such as overcharge protection, over-discharge protection, and short-circuit protection. Enhanced safety features: Equipped with advanced charging protection functions to prevent overcharging, overheating, and short circuits, extending battery life. and reliable: The main board is and reliable, and can be used for a long time to maintain the best performance of power tools. Easy to install: This protection board is user-friendly and has a simple installation process, making it an ideal choice for professionals and DIY enthusiasts. Color:As Shown Material:PCB Package Contents: 1 * 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.