Fujitsu LifeBook A6110 Replacement Battery FPCBP160 10.8V 4400mAh

Fujitsu LifeBook A6110 — 10.8V Li-ion Replacement Battery (FPCBP160)

This is a 10.8V, 4400mAh (47.52Wh) Li-ion replacement battery for the Fujitsu LifeBook A6110 and related A-series notebooks. It replaces OEM parts FPCBP160 and FPCBP160AP. Compatible models include the LifeBook A3130, A6120, and A6030, among others — all sharing the same voltage rail and connector format.

• A-series shared battery platform: The A6110, A6120, A3130, and A6030 all draw from the same 10.8V Li-ion spec and use the same physical connector with matching BMS handshake — that's why one part number covers the full range. No adaptation needed across these models.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a LifeBook A-series unit. The BMS communicated correctly with the BIOS, accepted charge without tripping protection, and reported capacity within expected tolerance across multiple cycles.
• Post-swap calibration for the A6110: After fitting this battery, run the laptop down to hibernate cutoff under normal load — screen on, CPU active — then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the false "poor health" or low-capacity warning that appears immediately after a cell swap.

BIOS reporting poor battery health right after installing a new cell

The LifeBook BIOS stores charge history and health data from the previous cell in its battery learn cycle registers. When a new cell goes in, those old values don't auto-clear — the BIOS compares actual charge acceptance against stale baseline data and flags the new cell as degraded. This is a firmware state issue, not a fault with the replacement battery. One full discharge-to-hibernate followed by an uninterrupted charge to 100% forces the BIOS to rewrite those registers against the new cell's actual performance.

Laptop shuts down at 20–30% charge shown on the fuel gauge

The fuel gauge IC on the A6110 estimates remaining capacity using voltage curves calibrated to the original cell's chemistry profile. After a cell swap, those curves are misaligned — the gauge reads 25% while actual cell voltage has already dropped past the cutoff threshold under CPU and display load. The laptop shuts down because the cell can't sustain voltage at that draw level, even though the gauge says otherwise. Run two to three full discharge-and-charge cycles; the fuel gauge IC recalibrates its curve against the new cell and the shutdowns stop.