About this replacement
Fujitsu Arrows Tab Q506/Q507 — 3.75V Li-Polymer Replacement Battery (FPB0327)
This is a 3.75V, 9000mAh (33.75Wh) Li-Polymer replacement battery for the Fujitsu Arrows Tab Q506 and Q507 tablet computers. It fits the original battery slot using part references FPB0327 and FPCBP500. Swap it in when the original cell no longer holds charge or fails to power the tablet through a normal workday.
- Q506 and Q507 compatibility: Both models share the same battery bay dimensions, voltage rail, and BMS connector pinout. The cell at 188.50 x 91.80 x 5.20mm fits both without modification, and the BMS handshake communicates correctly with the fuel gauge IC on either board revision.
- Bench tested on actual hardware: We ran charge and discharge cycles through the BMS on a Q506 unit. The protection circuit triggered correctly at high and low voltage thresholds, and the cell accepted a full charge without thermal runaway or abnormal voltage deviation.
- Post-install calibration on the Q506/Q507: After fitting this cell, run the tablet down to automatic hibernate-cutoff, then charge it uninterrupted to 100%. This forces the fuel gauge IC to re-learn the new cell's actual capacity curve and clears the inaccurate health warning that appears in system diagnostics after every cell swap.
BIOS reporting battery health as poor immediately after fitting a new cell
The Q506 BIOS reads health data stored in the old cell's EEPROM during every boot cycle. When a new cell arrives, the EEPROM values don't match the fresh chemistry, so the system flags it as degraded before a single charge has completed. This is not a fault with the replacement cell. Running two full discharge-to-hibernate and charge-to-100% cycles gives the fuel gauge IC enough data to overwrite the stale EEPROM reference. After that, the health status in BIOS and the OS battery panel should return to normal.
Arrows Tab Q506 shutting down at 20–30% charge remaining
This happens when the cell voltage drops below what the BMS allows under combined display and CPU load, even though the OS fuel gauge still shows capacity remaining. The fuel gauge is reading stored charge, but the cell can't sustain the voltage at that draw rate — the BMS trips as a protection response. It usually appears in the first few cycles before the fuel gauge IC calibrates to the new cell. Complete two full discharge-to-cutoff cycles and the OS reading will align with actual cell voltage. If it persists past three cycles, check that the connector is fully seated and re-read cell voltage at the pins — it should sit above 3.5V at 20% reported charge.