Fujitsu Stylistic Q704 Replacement Battery 10.8V 4150mAh

Fujitsu Stylistic Q704 — 10.8V Li-Polymer Replacement Battery (CP642113-01)

This 10.8V, 4150mAh (44.82Wh) Li-Polymer battery fits the Fujitsu Stylistic Q704 hybrid tablet-laptop. It replaces OEM part numbers CP642113-01, FPCBP414, and FPB0308S. It powers the detachable tablet portion of the Q704 and slots into the same connector as the original cell.

• Stylistic Q704 tablet unit fit: The Q704 uses a slim 6.10mm Li-Polymer cell tied to the tablet chassis, not the keyboard dock. The BMS in the tablet communicates directly with the Fujitsu firmware stack, so voltage and connector alignment matter — this cell matches both.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the Q704 platform. The BMS accepted the cell without fault codes, charge termination triggered correctly at full capacity, and the protection circuit responded to overcurrent as expected.
• Post-swap calibration on the Q704: After fitting this battery, run the tablet down fully until it reaches hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health or low-capacity warning that often appears after a cell swap.

BIOS reporting poor battery health immediately after fitting a new cell

The Q704 firmware reads battery health from EEPROM data stored by the old cell. When a new cell is installed, that data no longer matches actual capacity, so the BIOS flags the battery as degraded or unknown. This is a firmware calibration issue, not a fault with the replacement cell. Run one full discharge to hibernate cutoff followed by a full uninterrupted charge to 100% — after one or two cycles the BIOS fuel gauge IC re-learns the new cell's actual capacity and the warning clears.

Stylistic Q704 shutting down with 20–30% charge still shown on screen

This happens when the fuel gauge IC is still calibrated to the old, degraded cell. The percentage shown is based on stale capacity data, so the tablet hits the real voltage floor before the gauge reaches 0%. Under combined display and CPU load, the cell voltage drops faster than the gauge predicts. Force a full discharge to hibernate cutoff, then charge to 100% without interruption — after this cycle the gauge recalibrates to the new cell and the reported percentage will track actual charge accurately down to the 3.0V per-cell cutoff.