Xiaomi Mi (BN32) Lithium-ion Polymer Replacement Battery The BN32 rechargeable lithium-ion polymer battery is a dependable replacement made for compatible Xiaomi smartphones. It restores solid all-day power with built-in safety protections to ensure stable charging and long-term reliability. Specifications Model: BN32 Battery Type: Lithium-ion Polymer Capacity: 3200mAh (min) / 3300mAh (typ) Energy: 12.3Wh (min) / 12.7Wh (typ) Nominal Voltage: 3.85V Max Charge Voltage: 4.40V Safety Features: Protection against disassembly, overheating, and punctures