About this replacement
Oppo Realme GT5 150W — 7.82V Li-Polymer Replacement Battery (BLPA23)
This is a 7.82V 2620mAh Li-Polymer cell for the Realme GT5 150W smartphone. It replaces OEM part number BLPA23 and fits the GT5 150W directly. Capacity is rated at 20.49Wh — matching the original cell specification.
- GT5 150W platform fit: The Realme GT5 150W uses a dual-cell Li-Polymer pack at a nominal 7.82V, split across two series cells to handle the 150W SUPERVOOC charge protocol. This replacement matches that dual-cell voltage rail and connector pinout so the BMS handshake with the charge IC proceeds normally.
- Bench tested on actual hardware: We ran this cell through the GT5 150W charge controller on the bench. The BMS accepted the cell, initiated the standard SUPERVOOC negotiation sequence, and stepped through current tiers without dropping the session. No voltage spikes or cutoff events were recorded during the test cycle.
- First cycle after installation: Disable 150W fast charging for the first full discharge-charge cycle. The fuel gauge IC is calibrated to the old cell's discharge curve. Letting it complete one slow cycle first lets the coulomb counter re-anchor to the new cell before high-current charging pushes 150W into an uncalibrated state.
Why the GT5 150W shows wrong battery percentage after a cell swap
The GT5 150W uses a coulomb counter IC that builds its fuel gauge model against the old cell's impedance and discharge curve over many cycles. Swapping the cell doesn't reset that learned model automatically. The gauge then maps the new cell's voltage curve onto stale data, producing percentage readings that don't reflect actual charge state. One full slow discharge down to auto-shutoff and a complete slow charge resolves this — after that cycle the IC rebuilds its reference against the new cell.
Sudden shutdown at 20–30% remaining on the replacement cell
This happens when the fuel gauge IC hasn't yet recalibrated and the phone hits a voltage cliff under modem or display load before the reported percentage reaches zero. The cell voltage drops sharply under current draw even though the gauge still shows charge remaining. It is not a defective cell — it is the calibration gap between the old discharge model and the new cell's actual curve. Run one full discharge-charge cycle at standard speed and confirm the cell holds above 3.5V per cell under load before enabling 150W charging.