Features High‑precision voltage detection circuit, exquisite workmanship for maximum durability. The MOS tube can control the charging and discharging of the battery, and the standby current consumption is low. Fit for electric drills with starting current below 80A. With balance charging function. With anti‑overcharge, anti‑over‑discharge, anti‑over‑current, anti‑short circuit protection functions. 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 limit). Specification: Item Type: Lithium Battery Protection Board Material: PCB Balance Function: Yes Wiring Mode: Same Port Cell: LiNiCoMnO2 25.2V Main Circuit Conduction Internal Resistance: ≤20MΩ Application: Suitable for electric drills with starting current below 80A 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 limit) Package List:1 x Lithium Battery Protection Board Package List 1 x Lithium Battery Protection Board