BlackView A52 Li-Polymer Replacement Battery 3.85V 4700mAh

BlackView A52 — 3.85V Li-Polymer Replacement Battery (LIFHPV466595PFH)

This is a 3.85V, 4700mAh Li-Polymer cell for the BlackView A52 smartphone. It replaces the original LIFHPV466595PFH battery when the existing cell has degraded, lost capacity, or fails to hold a charge. Voltage and connector match the A52 board directly.

• A52 platform fit: The A52 uses a single Li-Polymer cell at 3.85V nominal — the same voltage rail the charge IC and power management unit expect. Swapping to a different voltage or chemistry would trip the PMIC protection circuit. This cell matches the voltage and physical connector the A52 mainboard is wired for.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the A52 platform. The BMS accepted the charge handshake without fault codes, and the charge IC stepped through constant-current and constant-voltage phases cleanly without thermal cutoff.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging for one complete discharge-charge cycle. The fuel gauge IC on the A52 was calibrated to the old cell's discharge curve. Running one full cycle at standard current lets it re-anchor its coulomb counter to the new cell before fast charging pushes higher current into an uncalibrated state.

Why the A52 reports wrong battery percentage after a cell swap

The A52 uses a fuel gauge IC that builds its percentage model from the discharge curve of the original cell. When a new cell is installed, the IC still references the old curve, so the displayed percentage drifts from the actual state of charge. This shows up as the phone reporting 40% but shutting off, or sitting at 1% for an unusually long time. One full discharge down to auto-shutdown followed by a complete charge cycle forces the IC to rebuild its reference points against the new cell. After that cycle, percentage accuracy normalises.

Sudden shutdown at 20–30% on the replacement cell

This happens when the A52's modem or display draws a load spike the cell cannot sustain without its terminal voltage dropping below the PMIC cutoff threshold — even though the fuel gauge still reads 20–30%. A new cell with an uncalibrated fuel gauge is especially prone to this because the IC doesn't yet know where the real voltage cliff is for this specific cell. The fix is the same recalibration cycle: fully discharge to shutdown, then charge to 100% without interruption. Once the coulomb counter has a clean full-range cycle, it maps the cliff accurately and shuts down at the correct threshold near 3.4–3.5V per cell.