Oppo BLP959 Reno 8 Pro Compatible Battery 3.87V 4850mAh

Oppo Reno8 T 4G / CPH2481 — 3.87V Li-Polymer Replacement Battery (BLP959)

This is a 3.87V, 4850mAh (18.77Wh) Li-Polymer battery carrying OEM part number BLP959. It fits the Oppo CPH2481, Reno8 T, and Reno8 T 4G. If your original cell is swelling, failing to hold charge, or cutting out before the percentage hits zero, this is a direct cell replacement.

• CPH2481 / Reno8 T platform fit: The CPH2481 and Reno8 T 4G share the same battery bay geometry, connector pinout, and BMS handshake logic — all three models use BLP959 as the factory cell. No adapter or rewiring needed.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on the CPH2481 platform. The BMS accepted the cell without fault codes, and the charge IC handed off correctly at 4.40V cutoff.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging for one complete discharge-charge cycle. This gives the fuel gauge IC time to map the new cell's discharge curve before high-current SUPERVOOC pushes current into an uncalibrated cell.

Sudden shutdown at 20–30% on the Reno8 T after a cell swap

This happens when the fuel gauge IC is still using the discharge curve from the old, degraded cell. The new cell has a steeper voltage cliff at low state-of-charge — the phone sees voltage drop under modem or display load and triggers an emergency shutdown before the percentage reaches zero. One full discharge-charge cycle without fast charging lets the coulomb counter reset against the new curve. After that cycle, the reported percentage and actual cell voltage track correctly again.

SUPERVOOC fast charge not activating after battery replacement

Oppo's SUPERVOOC protocol requires a handshake between the charge IC and the battery's BMS before elevated current is allowed. On the first cycle with a new cell, the BMS may default to standard 5V/2A charging until it completes an initialisation cycle. Plug into the original SUPERVOOC charger, let the phone charge to 100% without interruption, then restart the device. After reboot, the fast charge negotiation re-runs and SUPERVOOC should activate normally on the next charge.