About this replacement
Philips E380 / Xenium E380 — 3.7V Li-ion Replacement Battery (AB1750AWMT)
This is a 3.7V, 1650mAh (6.11Wh) Li-ion cell built to the AB1750AWMT specification. It fits the Philips E380 and Xenium E380 mobile phones. Swap it in when the original cell no longer holds a charge or causes unexpected shutdowns.
- E380 and Xenium E380 fitment: Both model variants share the same battery bay dimensions, connector pinout, and BMS handshake protocol. One cell covers both. No adapters or modifications needed.
- Bench tested on actual hardware: We ran the AB1750AWMT through full charge and discharge cycles on the E380 platform. The BMS accepted the cell without fault flags, and the charge IC completed a full cycle to 4.2V without thermal events.
- Fuel gauge recalibration on first install: After fitting this cell, disable fast charging and run one complete discharge-to-charge cycle before normal use. This lets the fuel gauge IC map the new cell's discharge curve. Without it, the percentage readout can drift or trigger a premature low-battery cutoff.
Sudden shutdown at 20–30% on the Philips E380 after a cell replacement
The E380's fuel gauge IC holds a calibration map tied to the original cell's internal resistance profile. A new cell has a different impedance curve, so the IC misreads the remaining voltage headroom. Under load — an active call, screen at full brightness, or a background data sync — the cell voltage drops below the IC's cutoff threshold while the display still reads 20–30%. The fix is one full uncapped discharge-charge cycle with fast charging off, which forces the IC to rebuild its map against the new cell.
Phone not powering on after the replacement cell sat in storage
Li-ion cells self-discharge in storage. If the AB1750AWMT cell voltage dropped below approximately 2.5V per cell before installation, the BMS will enter a lockout state and refuse to deliver current to the phone. The E380 will show no response — no boot screen, no charging indicator. Connect the phone to a low-current charger (the standard 5V wall adapter, not a fast charger) and leave it for 20–30 minutes without pressing the power button. Once the BMS detects sufficient voltage recovery, the charging indicator will appear and the phone will boot normally.