Philips Xenium I908 Replacement Battery AB3000CWMC 3.8V 2800mAh

Philips Xenium I908 — 3.8V Li-Polymer Replacement Battery (AB3000CWMC)

This is a 3.8V, 2800mAh lithium-polymer cell replacing part number AB3000CWMC in the Philips Xenium I908 smartphone. It fits the I908 only — verify your part number on the original cell before ordering. Capacity is 10.64Wh, matching the OEM specification for this slot.

• Xenium I908 fitment: The I908 uses a fixed connector pinout and a BMS handshake tied to the AB3000CWMC spec. This cell matches that pinout and communicates correctly with the phone's charge IC — no adapters or modifications needed.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the I908 platform. The BMS accepted the cell without fault flags, and the charge IC stepped through trickle, CC, and CV phases without interruption.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one full discharge-to-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes current into an uncalibrated state.

Sudden shutdown at 20–30% on the Xenium I908 after a cell swap

The I908's fuel gauge IC holds a discharge model built from the original cell's impedance profile. A new cell has a different internal resistance, so the coulomb counter miscalculates remaining capacity. Under modem or screen load, the actual cell voltage hits the low-voltage cutoff before the displayed percentage reaches zero. The phone shuts down hard at 20–30% because the voltage sags below 3.4V under load — not because the cell is faulty. One full discharge-charge cycle lets the fuel gauge IC relearn the cutoff point against the new cell's curve.

Phone feels warm near the battery compartment on the first charge after replacement

A new lithium-polymer cell starts with higher internal impedance than a cell that has been through several cycles. The charge IC pushes constant current into a cell that dissipates more energy as heat until impedance drops. This is normal on cycles one and two — it is not a sign of a defective cell or a faulty charger. If warmth persists past the third full charge cycle, check that the charge IC has switched to CV phase at 4.2V and is not stuck in CC mode.