Philips Xenium V726 Replacement Battery AB2100AWMC 3.7V 2200mAh

Philips Xenium V726 / X622 / W725 — 3.7V Li-ion Replacement Battery (AB2100AWMC)

This is a 3.7V, 2200mAh (8.14Wh) Li-ion cell for the Philips Xenium V726, X622, W725, W820, and related Xenium-series rugged phones. It replaces OEM part AB2100AWMC. Fit the battery when the original cell no longer holds a usable charge or the phone shuts down unexpectedly under load.

• Xenium multi-model fit: These Xenium models share the same battery bay dimensions, connector pinout, and 3.7V charging rail. One cell covers the full set — no wiring adapters or BMS modifications needed.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on compatible Xenium hardware. The BMS accepted the charge IC handshake on the first cycle and held the cutoff voltage correctly at both ends of the curve.
• Fuel gauge recalibration on first install: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the phone's fuel gauge IC map the new cell's actual discharge curve before high-current charging pushes current into an uncalibrated cell.

Sudden shutdown at 20–30% on the replacement cell

When the Xenium V726 shuts down at 20–30% remaining, it is almost always a voltage cliff — the cell voltage drops below what the modem or display load needs before the coulomb counter hits zero. The fuel gauge IC is still calibrated to the old cell's curve, so reported percentage and actual cell voltage diverge under load. One full discharge-to-cutoff followed by an uninterrupted charge cycle forces the IC to relearn the new curve. After that cycle, the phone should track state of charge accurately down to the real low-voltage cutoff near 3.0V.

Phone reports incorrect battery percentage after cell swap

The Xenium series uses a fuel gauge IC that stores a learned discharge model from the previous cell. Swapping the physical cell does not reset that model automatically. The result is percentage readings that jump, stall at a fixed number, or drop suddenly — none of which reflect actual charge state. Run one complete discharge cycle from 100% to automatic cutoff without interruption, then charge fully without removing the phone from the charger, and the IC will overwrite its stored curve with data from the new cell.