Redmi Note 1/Note 3G/Note 4G (BM42) Li-ion Replacement Battery
The BM42 is a rechargeable Lithium-ion / Lithium-ion Polymer (Li-Po) battery designed for selected Xiaomi Redmi Note series smartphones, including Redmi Note 1, Note 3G, and Note 4G models. With a rated capacity of 3100mAh and a typical capacity of 3200mAh, this battery provides stable power delivery, reliable backup time, and efficient charging performance for everyday smartphone use. Operating at a nominal voltage of around 3.8V and supporting a limited charge voltage up to 4.4V, the BM42 is an ideal replacement option to restore original battery performance.
Specifications
- Battery Model: BM42
- Battery Type: Lithium-ion (Li-ion) / Lithium-ion Polymer (Li-Po)
- Rated Capacity: 3100mAh
- Typical Capacity: 3200mAh
- Energy: ~11.78Wh - 12.16Wh
- Nominal Voltage: 3.8V / 3.84V
- Limited Charge Voltage: 4.35V / 4.4V
- Compatibility: Xiaomi Redmi Note 1 / Note 3G / Note 4G