Xiaomi BN31 Original-Capacity Replacement Battery (3080mAh)

The Xiaomi BN31 battery is a widely used internal Lithium-ion Polymer replacement cell. Unlike Apple’s software-locked components, Xiaomi batteries can be seamlessly replaced by a technician without triggering operating system warning messages or hiding the device’s battery health stats.

If your device is experiencing rapid percentage dropping, lagging under a heavy load, or shutting down randomly around 15% to 20%, it means the chemical layers inside the cell have degraded. Installing a fresh BN31 replacement cell instantly restores standard system fluidities and your phone’s native standby life.

• Battery Model: BN31

• Battery Type: Lithium-ion Polymer (Li-Polymer)

• True Capacity: 3080 mAh (Typical) / 3000 mAh (Rated)

• Standard Voltage: 3.85V

• Charging Voltage Limit: 4.40V

• Safety Integration: Equipped with a built-in protection circuit board (overload and short-circuit prevention).

• Device Compatibility: This exact structural footprint and connector ribbon cable are natively compatible across a broad group of classic Xiaomi smartphones:

  • Xiaomi Mi A1 (Mi 5X)

  • Xiaomi Redmi Note 5A / Note 5A Prime

  • Xiaomi Redmi S2 (Redmi Y2)

  • Xiaomi Redmi Y1 / Y1 Lite