Features High precision voltage detection circuit, fine workmanship for maximum durability. Suitable for lithium batteries with a rated voltage of 3.7V and a maximum voltage of 4.2V (including 18650, 26650, Li‑Polymers, no size limit). Suitable for electric drills with starting current below 80A. With balance load function. With anti-overcharging, anti-overdischarge, over-current, anti-short circuit protection functions. 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 electric drills with starting current less than 80A Suitable for lithium batteries with a rated voltage of 3.7V and a full voltage of 4.2V (including 18650, 26650, Li‑Polymers, without size limit) Package list: 1 x Lithium Battery Protection Panel Package List 1 x Lithium Battery Protection Board