The BM47 battery is used to replace the original internal battery when the old one has degraded, swollen, or can no longer hold a proper charge.
Specifications
Specification
Details
Battery Model
BM47
Battery Type
Rechargeable Lithium‑ion Polymer (Li‑Po)
Capacity
4000 mAh (typical) / 15.4 Wh (energy capacity)
Nominal Voltage
3.85 V
Compatibility
Designed for Xiaomi Redmi 4X, also compatible with Redmi 3, Redmi 3S, Redmi 3X
Cell Chemistry
Lithium‑Ion Polymer (Li‑Po)
Condition
Brand‑new replacement battery (aftermarket / OEM quality)
Certifications
CE, RoHS, FCC, UL (on many replacement units)
Physical Color
Typically black/neutral casing (varies by supplier)
Installation
Internal battery — requires opening phone casing (professional service recommended)
Warranty (varies)
Commonly ~12 months + 30‑day money‑back guarantee (seller dependent)