OPPO Reno 11F Compatible Battery BLPA41 3.91V 5000mAh

Oppo Reno 11F / Reno 11F 5G — 3.91V Li-Polymer Replacement Battery (BLPA41)

This is a 5000mAh Li-Polymer replacement battery for the Oppo Reno 11F and Reno 11F 5G smartphones. It matches the BLPA41 OEM specification at 3.91V nominal voltage and 19.55Wh. It replaces a worn or failed original cell when the phone can no longer hold a full day's charge.

• Reno 11F and 11F 5G compatibility: Both variants use the same BLPA41 cell format, connector, and BMS handshake. The 5G variant draws harder on the battery during mmWave or Sub-6GHz data sessions, but the cell spec is identical across both boards.
• Bench tested on actual hardware: We cycled this cell through a full discharge and charge on the Reno 11F mainboard. The BMS accepted the charge handshake without error flags, and the fuel gauge IC registered capacity within expected tolerance of the rated 5000mAh.
• First cycle after installation: Disable fast charging for your first 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 charge pushes current into an uncalibrated state.

Sudden shutdown at 20–30% on the replacement cell

A new BLPA41 cell has a slightly different discharge curve than the worn cell the fuel gauge IC was calibrated to. When the phone hits a steep voltage drop under modem or display load, the fuel gauge misreads remaining capacity and the protection circuit triggers a hard shutdown. This is not a faulty battery. One full discharge to automatic cutoff, followed by a full charge with fast charging disabled, forces the coulomb counter to remap against the new cell. After that cycle, shutdowns at 20–30% typically stop.

USB-PD or SUPERVOOC fast charge not working after cell swap

On the first charge cycle after installation, the charge IC may not complete the SUPERVOOC handshake with the new cell's BMS. The phone defaults to standard 5W charging as a safety fallback. This is expected behaviour — the charge IC is reading impedance on an unconditioned cell and holds back high current until it builds a baseline. Charge fully at standard rate first, then reconnect; fast charging resumes on the second or third cycle once the charge IC has logged acceptable impedance readings.