Redmi 4 (BN42) Li-polymer Replacement Battery
The BN42 Li-polymer replacement battery is made to restore reliable, long-lasting power to your Xiaomi Redmi 4, delivering solid daily performance with built-in safety protection for stable charging and dependable use.
Specifications
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Model: BN42
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Type: Lithium-Polymer Battery
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Capacity: 4000mAh (min) / 4100mAh (typ)
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Nominal Voltage: 3.85V
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Charging Limit: 4.40V
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Safety Warning: Do not disassemble, puncture, or expose to high temperatures