Discover the ultimate solution for lithium battery safety with our 3S 40A/60A Balance Li-ion Lithium Battery Charger Protection Board. Designed for the 18650 BMS, this compact board (41*61mm, 4.3g) ensures your batteries are charged within the safe voltage range of 12.6V-13.0V. It's an indispensable tool for the electrical trade, providing essential protection against overcharging, over-discharging, and short circuits. Whether you're engaged in DIY electrical projects or professional battery management, this protection board guarantees efficiency and longevity for your lithium batteries.