About this replacement
Philips Xenium T910 / X603 / X620 / X630 — 3.7V Li-ion Replacement Battery (AB1530AWM)
This is a 3.7V, 1400mAh Li-ion cell replacing part numbers AB1530AWM and AB1530BWM. It fits the Philips Xenium T910, X603, X620, and X630, plus three additional Xenium variants sharing the same form factor. Dimensions are 64.80 × 42.00 × 5.22mm — verify against your original before installing.
- Xenium T910 / X603 / X620 / X630 compatibility: These four models share the same battery bay geometry, connector pinout, and BMS handshake. A single cell covers the full group without modification.
- Bench tested on actual hardware: We cycled this cell through charge and load on compatible Xenium hardware. The BMS accepted charge from 0% and held voltage flat through mid-draw screen and call simulation without tripping protection cutoff.
- Fuel gauge recalibration on first cycle: On first use after installation, disable fast charging for one complete discharge-charge cycle. This allows the fuel gauge IC to map its coulomb counter against the new cell's actual discharge curve before high-current charging runs into an uncalibrated state.
Why the Xenium T910 reports wrong battery percentage after a cell swap
The fuel gauge IC stores a discharge curve from the original cell in its coulomb counter. When a new cell goes in, the IC applies the old curve to a different impedance profile, so displayed percentage drifts from actual charge state. The fix is one full discharge to auto-shutoff followed by an uninterrupted charge to 100%. After that cycle, the IC recalibrates and percentage tracking stabilises.
Sudden shutdown at 20–30% on the replacement cell
This happens when the cell voltage drops sharply under modem or screen load — a voltage cliff the fuel gauge IC doesn't predict because it hasn't finished mapping the new cell. The phone's protection circuit reads a safe percentage but the cell can't sustain voltage under peak draw, so the device shuts off. Run one full discharge-charge cycle without interruption. After calibration, the IC tracks the cliff correctly and percentage at shutdown drops to the expected 3–5% range.