The BN46 is a rechargeable lithium‑ion / lithium‑polymer battery used as the internal power cell in certain Xiaomi Redmi series smartphones, including Redmi 7, Redmi Note 8, Redmi Note 8T, and similar models
Specifications
Specification
Details
Battery Model
BN46
Battery Type
Rechargeable Lithium‑Ion / Li‑Polymer (Li‑Po)
Capacity
≈3900 mAh – 4000 mAh (varies slightly depending on seller and exact version)
Energy
≈15.0 Wh – 15.4 Wh (typical energy based on capacity × voltage)
Nominal Voltage
3.85 V standard for smartphone Li‑ion/Li‑Po cells
Max Charge Voltage
~4.40 V (common safe charging limit)
Cell Configuration
Single‑cell stack (flat pouch type)
Color
Black (typical casing color)
Origin / Quality
OEM or high‑quality replacement; certifications such as CE, RoHS, FCC often included on quality units
Installation
Internal battery — requires opening the phone; professional installation recommended
