This 3.87V 3950mAh Li-Polymer battery is a compatible replacement for Xiaomi BM4K. Compare the number printed on your current battery, its voltage, chemistry, dimensions and connector before ordering.
Included: One replacement battery pack.
Current Estimated Delivery Date: 1-2 Weeks
Battery specifications
| Voltage | 3.87V |
| Capacity | 3950mAh |
| Chemistry | Li-Polymer |
| Energy | 15.29Wh |
| Dimensions | 115.00 x 39.70 x 5.20mm |
| Battery weight | 56g /1.98 oz |
Replacing your Xiaomi BM4K battery
Compare the connector shape, wire arrangement and polarity with your original battery. Check all listed specifications; a similar model name or matching voltage alone does not confirm a fit.
Compatible equipment models
Xiaomi Mix Alpha
Replacement battery numbers
Xiaomi BM4K