Welcome to the store! High-precision voltage detection circuit, exquisite workmanship for maximum durability and convenient size. MOS tube can control battery charging and discharging, and standby power consumption is low. Over-discharge protection, over-current protection, overcharge protection, high charging and discharging current. Suitable for electric drills with starting current below 20A and power below 170W. With balance charging function. Suitable for lithium batteries with a nominal voltage of 3.7V and a full voltage of 4.2V (including 18650, 26650, Li‑Polymer, no size limitation). Item Type: Lithium Battery Protection Board Material: PCB Balance Function: Yes Wiring: Same port Cell: LiNiCoMnO2 25.2V Main Circuit Wiring Internal Resistance: ≤20MΩ Application: Suitable for lithium batteries with a nominal voltage of 3.7V and a full voltage of 4.2V (including 18650, 26650, Li‑Polymer, no size limitation). 1 x Protection Board Your 100% satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will give you the best solution!