Philips EAA-89 Laptop Replacement Battery 11.1V 4400mAh

Philips EAA-89 — 11.1V Li-ion Replacement Battery

This is an 11.1V, 4400mAh (48.84Wh) Li-ion battery built to replace the OEM EAA-89 cell in compatible Philips notebook and laptop computers. It slots into the same bay as the original and connects to the same BMS handshake points. Use the OEM part number EAA-89 to confirm fit before ordering.

• EAA-89 platform compatibility: Philips notebooks in this line share a common voltage rail at 11.1V nominal and use the same three-cell Li-ion configuration. The BMS connector pinout and charge termination logic are consistent across this battery family, so the replacement cell communicates with the charge controller without modification.
• Bench tested on actual hardware: We cycled this cell through charge, full-load discharge, and BMS trip conditions on compatible Philips notebook hardware. The protection circuit responded correctly to over-discharge cutoff and resumed normal charging after reconnection to AC power.
• Post-install calibration: After fitting this cell, run one full discharge down to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on Philips notebooks.

Why the Philips notebook shuts down at 20–30% after a battery swap

This happens because the new cell's voltage curve does not match the EEPROM profile the fuel gauge IC learned from the old, degraded cell. Under combined CPU and display load, voltage drops faster than the gauge predicts, and the BMS cuts power before the displayed percentage reaches zero. The fix is a calibration cycle — full discharge to hibernate, then a single uninterrupted charge to 100%. After two to three cycles the fuel gauge IC re-maps its discharge curve against the new cell chemistry and the shutdowns stop.

BIOS reporting the replacement cell's Wh rating incorrectly in system info

The Wh value shown in BIOS or OS battery info pulls from EEPROM data stored on the battery's controller board, not from a live measurement. If the replacement cell's EEPROM was programmed with a different rated capacity than the original, the system will display a mismatched figure. This does not affect charge or discharge behaviour — it is a data mismatch between the cell's embedded profile and the system's expected value. To verify actual capacity, run a full charge-discharge cycle and compare the reported discharge Wh against the rated 48.84Wh on the label.