The 3S 11.1V 10A 18650 Lithium Battery Overcharge and Over-current Protection Board is designed for safe and efficient battery management. It safeguards your battery pack against overcharging, over-discharging, overcurrent, and short circuits, ensuring longer battery life and stable performance. Ideal for DIY battery packs, e-bikes, power tools, and other lithium-ion applications, this high-quality board ensures reliability and consistent output.