Fujitsu LifeBook E8110 Compatible Battery 14.4V 4400mAh

Fujitsu LifeBook E8110 / E8210 — 14.4V Li-ion Replacement Battery (FPCBP144AP)

This is a 14.4V Li-ion battery rated at 4400mAh (63.36Wh), built to fit the Fujitsu LifeBook E8110 and E8210 notebook series. It replaces OEM parts FPCBP144AP, FPCBP144, and S26391-F2592-L500. The physical footprint matches the original tray at 204.98 x 60.80 x 20.30mm.

• E8110 and E8210 compatibility: Both models share the same 14.4V power rail, identical battery connector pinout, and the same BMS handshake protocol — one cell fits both without modification.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the E8110 platform. The BMS communicated cleanly with the system board, and charge acceptance held stable across the full 14.4V range without cutoff anomalies.
• First-cycle calibration on the E8110: After fitting the new cell, run one full discharge until the system hibernates at low voltage, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning the E8110 BIOS generates after every cell swap.

Why the LifeBook E8110 BIOS reports poor battery health on a new cell

The E8110 BIOS reads health data from the battery's EEPROM — a small memory chip that stores cycle count, rated capacity, and charge history. When a new cell arrives, that EEPROM data does not match what the BIOS expects from a battery logged to the system. The BIOS interprets the mismatch as a degraded unit and flags poor health immediately. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% triggers the battery learn cycle and rewrites the BIOS reference point against the new cell's actual data.

LifeBook E8110 shutting down at 20–30% charge shown

This happens when the cell voltage collapses faster than the fuel gauge IC can track under combined CPU and display load. The gauge reads 20–30% but the actual cell voltage has already dropped below the BMS cutoff threshold, triggering an immediate shutdown. It is not a faulty battery — it is the fuel gauge IC losing calibration against a new cell's discharge curve. Run two to three full discharge-and-charge cycles, and the gauge IC will re-anchor its curve; the shutdown point will shift back toward 5% or lower, which is the correct cutoff for this platform.