BLP893 Oppo Reno 7 Replacement Battery 3.87V 4350mAh

Oppo Reno 7 / Reno 7 5G — 3.87V Li-Polymer Replacement Battery (BLP893)

The BLP893 is a 3.87V, 4350mAh Li-Polymer cell that fits the Oppo Reno 7, Reno 7 5G, and PFJM10. It replaces the original battery when capacity has dropped, the phone shuts off unexpectedly, or the cell no longer holds a useful charge. Dimensions are 89.50 x 62.50 x 4.30mm — a direct physical match to the factory cell slot.

• Reno 7 and Reno 7 5G compatibility: Both models run the same power rail voltage and use identical connector pinouts and BMS handshake logic, so one cell covers the full model range including the PFJM10 regional variant.
• Bench tested on actual hardware: We cycled this cell through charge and load on Reno 7 hardware. The BMS accepted the charge handshake without fault flags, and the protection circuit triggered correctly at low-voltage cutoff — no thermal events observed.
• First-cycle fast charge handling: On first use after installation, disable VOOC or fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate its coulomb counter against the new cell's discharge curve before high-current fast charging pushes current into an uncalibrated cell.

Sudden shutdown at 20–30% on a replacement Reno 7 cell

This is a voltage cliff problem, not a capacity problem. Under heavy modem or screen load, the new cell's internal resistance causes terminal voltage to sag below the cutoff threshold before the reported percentage reaches zero. The fuel gauge IC is still calibrated to the old cell's discharge curve, so it misjudges remaining capacity. Run two full discharge-charge cycles without fast charging — by the end of the second cycle, the coulomb counter has enough data to map the new cell accurately and the shutdowns stop.

Reno 7 won't power on after the replacement cell sat in storage

Li-Polymer cells self-discharge in storage. If the cell voltage dropped below approximately 2.5V per cell, the BMS enters lockout mode to prevent damage — and the phone shows nothing when you press power. Connect to a wall charger rated at least 5V/1A and leave it for 20–30 minutes without interruption. The charge IC trickle-charges the cell back above the BMS recovery threshold, at which point the phone should display the charging animation. If it does not appear after 30 minutes, check the charge cable and port before assuming cell failure.