The BN4A is a Li-Po battery for Xiaomi Redmi Note 7, Note 7 Pro, and Note 7S, with a 3900mAh - 4000mAh capacity and 3.85V voltage. It features overcharge, overheating, and short-circuit protection and supports fast charging. Designed for 500+ charge cycles, it ensures stable performance with MIUI. Use original chargers for longevity. 🚀
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