Features Suitable for electric drills with starting current less than 20A and power less than 170W. With balance load function. Discharge protection, over-current protection, overload protection, high charging and discharge current. Suitable for lithium batteries with a rated voltage of 3.7 V and a full voltage of 4.2 V (including 18650, 26650, Li-Polymers, no size limit). High precision voltage detection circuit, fine workmanship for maximum durability and convenient size. The MOS tube can control the charging and discharge of the battery, and the standby current consumption is low. Specification: Item Type: Lithium Battery Protection Card Material: PCB Balance Function: Yes Cabling mode: same port Cell: LiNiCoMnO2 25.2V Main circuit internal conduction resistance: ≤20MΩ Application: Suitable for lithium batteries with a nominal voltage of 3.7V and a total voltage of 4.2V (including 18650, 26650, Li‑Polymers, without size limit). Package list: 1 x protective panel Package List 1 x Protection Board