Oppo BLPA05 Reno 10 5G Replacement Battery 3.89V 5000mAh

Oppo CPH2531 / Reno 10 5G — 3.89V Li-Polymer Replacement Battery (BLPA05)

This is a 3.89V 5000mAh lithium-polymer replacement cell for the Oppo CPH2531 and Reno 10 5G smartphones. It replaces OEM part number BLPA05 and fits the original battery bay without modification. Use the capacity figure from the product listing — 5000mAh / 19.45Wh — as the reference spec.

• CPH2531 and Reno 10 5G platform fit: Both models run the same battery bay dimensions, connector pinout, and BMS handshake protocol. The BLPA05 part number covers both variants, so one cell replaces either device without adapter or wiring changes.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the CPH2531 platform. The BMS accepted the charge IC handshake on first contact and held voltage within spec across the full discharge curve — no false cutoffs, no thermal flags during charge.
• Fuel gauge recalibration on first cycle: On first use after installation, disable SUPERVOOC fast charging for one full discharge-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging begins — skipping this step can leave the coulomb counter reading against the old cell's profile.

Sudden shutdown at 20–30% on the Reno 10 5G after a cell swap

This happens when the fuel gauge IC is still calibrated to the degraded discharge curve of the original cell. The new cell's voltage drops at a different rate under modem and display load — the gauge reads 25% but the actual cell voltage has already crossed the low-voltage cutoff threshold. The BMS triggers a hard shutdown to protect the cell before the OS can respond. One full discharge-charge cycle without fast charging resets the coulomb counter and eliminates this behaviour.

SUPERVOOC fast charging not activating on the first charge after replacement

Oppo's proprietary fast charge protocol requires a handshake between the charge IC, the cable, and the battery BMS. On a freshly installed cell, the BMS may default to standard 5V charging on the first cycle as a protective fallback — this is normal behaviour, not a fault. Disconnect the charger after the first full charge completes, then reconnect. The SUPERVOOC handshake should establish correctly on the second charge session once the BMS has completed its initial calibration pass.