BLP705 Oppo Reno 10x Zoom Compatible Battery 3.85V 3500mAh

Oppo Reno 10x Zoom — 3.85V Li-Polymer Replacement Battery (BLP705)

This is a 3.85V, 3500mAh Li-Polymer cell replacing part number BLP705 in the Oppo Reno 10x Zoom. It fits CPH1919, PCCM00, and PCCT00 variants. The cell matches the original's physical dimensions at 66.50 x 64.56 x 4.75mm and drops into the same connector position.

• CPH1919 / PCCM00 / PCCT00 compatibility: All three board revisions share the same battery bay geometry, connector pinout, and BMS handshake voltage thresholds — one cell fits all without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the Reno 10x Zoom mainboard. The BMS accepted the cell without triggering a fault flag, and the charge IC stepped through trickle, CC, and CV phases as expected.
• First-cycle calibration tip: On first use after installation, disable VOOC fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate against the new cell's discharge curve before high-current charging pushes current into an uncalibrated coulomb counter.

Sudden shutdown at 20–30% on the Reno 10x Zoom after a cell swap

The Reno 10x Zoom's fuel gauge IC uses a stored discharge curve from the previous cell to estimate remaining capacity. A new cell with a slightly different internal resistance profile will hit a voltage cliff earlier than the old curve predicts. When the modem transmits or the 48MP camera fires, instantaneous current draw causes a sharp voltage dip that the BMS reads as a dead cell — triggering shutdown even though charge remains. Run two full discharge-charge cycles without fast charging and the coulomb counter will remap to the new cell's actual curve.

VOOC fast charge not activating on the first cycle after replacement

Oppo's VOOC protocol requires a handshake between the charger, charge IC, and the battery's BMS before elevated current is permitted. On the first cycle with a new cell, the charge IC defaults to standard 5V/1A input until it confirms the BMS is responding correctly. This is normal behaviour — not a fault. Connect the original VOOC charger, complete one full charge at standard rate, then reconnect. VOOC negotiation should complete and the fast-charge indicator will appear at the lock screen.