Xiaomi BN43 Original-Capacity Replacement Battery (4100mAh)

The BN43 is a high-density internal Lithium-ion Polymer replacement battery manufactured specifically for one of Xiaomi’s most legendary legacy devices, the Redmi Note 4 series. Swapping out your old battery for a fresh, true-capacity BN43 cell addresses common aging issues such as rapid power drop-offs below 20%, boot-looping on the “Mi” logo, or physical swelling that places hazardous pressure on the LCD screen and back cover.

• Battery Model: BN43

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

• True Capacity: 4100 mAh (Typical) / 4000 mAh (Rated)

• Standard Voltage: 3.85V

• Charging Voltage Limit: 4.4V

• Safety Integration: Built with an optimized Protection Circuit Module (PCM) incorporating a dual-IC design. This shields the legacy motherboard architecture from high-voltage surges, controls operating temperatures, and prevents dangerous overcharging.

• Device Compatibility: This specific dimensions block and flex connector profile fit:

  • Xiaomi Redmi Note 4 (Snapdragon / Global Edition)

  • Xiaomi Redmi Note 4X (Standard Edition)