OPPO A60 4G BLPA49 Compatible Battery 3.91V 4850mAh

Oppo A60 4G / CPH2631 — 3.91V Li-Polymer Replacement Battery (BLPA49)

This is a 4850mAh Li-Polymer cell at 3.91V, built to the BLPA49 spec. It fits the Oppo A60 4G (model code CPH2631). If your A60 4G is shutting down unexpectedly, failing to charge, or not powering on at all, this cell replaces the original unit directly.

• A60 4G / CPH2631 fitment: Both model references share the same physical cell footprint, BLPA49 OEM part number, and BMS connector pinout. One cell covers both variants — no hardware differences between them that affect battery compatibility.
• Bench tested on actual hardware: We ran charge and discharge cycles through the A60 4G charge IC and confirmed the BMS handshake completed correctly. The fuel gauge IC accepted the new cell and began coulomb counting without throwing a fault state.
• Fuel gauge recalibration on first cycle: On first use after installation, disable fast charging and run one full discharge down to automatic shutdown, then charge to 100% on standard current. This gives the fuel gauge IC a clean reference curve against the new cell before high-current charging is applied to an uncalibrated cell.

Sudden shutdown at 20–30% on the A60 4G after a cell swap

A new Li-Polymer cell has a slightly different discharge curve than the aged cell the fuel gauge IC was calibrated against. When load spikes — modem transmitting, screen at full brightness — the cell voltage drops sharply in that uncalibrated zone. The fuel gauge reads that voltage drop as empty and triggers an emergency shutdown even though capacity remains. One complete discharge-charge cycle on standard current recalibrates the coulomb counter and resolves this. After that cycle, shutdowns at 20–30% should stop.

Oppo A60 4G not powering on after the battery sat discharged in storage

Li-Polymer cells that drop below approximately 2.5V enter a BMS lockout state — the protection circuit opens to prevent cell damage, and the phone shows nothing when you press the power button. Plug in a known-good charger and leave it connected for 15–20 minutes without attempting to power on. The charge IC applies a low trickle current that brings the cell above the BMS re-enable threshold, typically around 2.8–3.0V. Once the BMS re-initialises, normal charging resumes and the device will power on.