Compatibility: Specifically designed for MAKITA 40V tools, this PCBA charging protection circuit board is perfect for 18650 BL4030 Li-ion batteries and compatible with BL4025 battery housings Enhanced Safety: Features built-in overcharge, over-discharge, and short-circuit protection to ensure the longevity and safety of your battery setup Durable Construction: Crafted with high-quality materials, this circuit board is built to withstand rigorous use, ensuring reliability and efficiency Easy Installation: Designed for easy setup, this circuit board allows for quick and hassle-free installation, making it ideal for both professionals and DIY enthusiasts Optimal Performance: Ensures your batteries operate at their peak performance, providing consistent power and extended life to your tools Due to different batches, there may be differences in product appearance and printed text, which will not affect use Color: Green Material: PCB Package Contents: 10 x PCBA Charging Protection Circuit 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.