Philips V526 Replacement Battery AB5000AWML 3.8V 4900mAh

Philips V526 / V787 Series — 3.8V Li-Polymer Replacement Battery (AB5000AWML)

This is a 3.8V, 4900mAh lithium-polymer replacement battery for the Philips V526, V787, CTV526, and Xenium V526 smartphones. It matches the OEM voltage and physical footprint of the original AB5000AWML / AB5000AWMT cell. Swap it in when the original cell no longer holds a usable charge across a full day.

• V526 / V787 platform fit: These models share the same battery bay dimensions, connector pinout, and BMS handshake protocol — all confirmed against the AB5000AWML specification. One replacement cell covers the full listed range.
• Bench tested on actual hardware: We ran this cell through a full charge-discharge cycle on V526 hardware. The BMS accepted the cell without error flags, and the charge IC stepped through trickle, CC, and CV phases cleanly.
• Fuel gauge recalibration on first cycle: On first use after installation, disable fast charging and run one complete discharge-to-charge cycle. The fuel gauge IC in these phones calibrates its coulomb counter against the cell's actual discharge curve — skipping this step on a new cell leads to inaccurate percentage readings for the first several cycles.

Sudden shutdown at 20–30% on the replacement cell

The V526's fuel gauge IC retains the old cell's discharge curve after a swap. The new cell's actual voltage under load drops faster than the calibrated curve predicts, so the phone hits the hardware low-voltage cutoff before the reported percentage reaches zero. This is not a faulty cell — it is a calibration mismatch. Run two full discharge-charge cycles with fast charging disabled, and the coulomb counter will remap to the new cell. After recalibration, the shutdown point should align with 5% or below.

USB fast charge not activating after battery replacement

On the first charge cycle after fitting a new cell, some V526 units will not negotiate the fast-charge protocol — the phone charges at standard 5V/1A instead. The charge IC runs a safety check on a newly detected cell and defaults to slow charge until it confirms cell impedance is within range. Plug in, let the first charge complete fully without interrupting it, then disconnect and reconnect the charger. Fast charging typically resumes from the second cycle onward.