About this replacement
Philips Xenium X1560 / X5500 — 3.7V Li-ion Replacement Battery (AB2900AWMC)
This is a 3.7V, 2700mAh Li-ion replacement battery for the Philips Xenium X1560 and X5500 mobile phones. It carries OEM part number AB2900AWMC and slots into the original battery bay with the same connector and contact layout. Capacity figures are taken from the product data — 9.99Wh total energy.
- X1560 and X5500 compatibility: Both models share the AB2900AWMC form factor, contact pitch, and 3.7V nominal voltage rail. The BMS handshake logic is identical across this Xenium sub-family, so one cell fits both without adapter or modification.
- Bench tested on actual hardware: We cycled this cell through full charge and controlled discharge on a Xenium X1560 unit. The BMS accepted the charge IC handshake on the first cycle, temperature stayed within normal range, and no protection cutoffs triggered under sustained load.
- Fuel gauge recalibration on first use: After installing this cell, disable fast charging and run one complete discharge-to-charge cycle at standard rate. The fuel gauge IC calibrates its coulomb counter against the new cell's discharge curve — skip this step and the OS percentage readout will lag real capacity by 15–20%.
Sudden shutdown at 20–30% on the Xenium X1560
This happens when the cell voltage drops below the minimum threshold the modem or display backlight needs under peak load, even though the fuel gauge still reads 20–30%. A degraded or uncalibrated cell cannot hold voltage under that instantaneous current draw, so the BMS cuts output to protect the cell. On a fresh replacement, this usually means the fuel gauge IC is still mapped to the old cell's discharge curve. Run one full discharge-charge cycle at standard charge rate and let the coulomb counter remap. After that cycle, shutdowns below 15% are normal — below 10% means recalibration is still incomplete; run a second full cycle.
Phone won't power on after sitting in storage with low charge
If the replacement cell self-discharged below roughly 2.5V during storage, the BMS enters lockout mode and blocks current flow entirely — the phone appears completely dead. Plug into a wall charger, not a USB port, and leave it for 20–30 minutes without pressing the power button. Most Xenium charge ICs apply a trickle pre-charge below 3.0V to bring the cell back above the BMS re-enable threshold. If the charge indicator LED does not appear within 40 minutes on wall power, check that the charger output is at least 5V 1A — underpowered USB sources sometimes cannot trip the pre-charge circuit.