Asus Eee PC 1008 Compatible Battery AP31-1008P 10.95V 2900mAh

Asus Eee PC 1008 / 1008P / 1008KR — 10.95V Li-Polymer Replacement Battery (AP31-1008P)

This is a 10.95V, 2900mAh (31.76Wh) Li-Polymer battery for the Asus Eee PC 1008, 1008P, and 1008KR netbooks. It replaces OEM part numbers AP31-1008P, AP32-1008P, and 90-OA1P2B1000Q. If your original cell has swollen, refuses to hold a charge, or drops to zero unpredictably, this is the direct swap.

• Eee PC 1008 series fit: The 1008, 1008P, and 1008KR share the same battery bay dimensions, connector pinout, and BMS handshake protocol. All three accept this cell without modification. The 241.00 x 61.93 x 11.90mm form factor seats flush in the battery bay.
• Bench tested on actual hardware: We cycled this cell through full charge and controlled discharge on the Eee PC platform. The BMS communicated correctly with the BIOS, reported accurate state-of-charge, and did not trigger false low-battery shutdowns during testing.
• First-cycle calibration on the Eee PC 1008: After installing, run one full discharge until the netbook hibernates, then charge uninterrupted to 100% without interruption. This resets the BIOS battery learn cycle. Skipping this step causes the health indicator to show "poor" or report inaccurate capacity for the first several sessions.

Eee PC 1008 shutting down at 20–30% battery shown

This is a voltage cliff issue, not a fuel gauge error. Under combined CPU and display load, the cell voltage drops faster than the BIOS fuel gauge can track — the system hits the hardware low-voltage cutoff before the percentage reaches zero. It happens most often when the original cell has aged past its usable cycle count. A fresh cell at full charge voltage (around 12.6V fully charged across the three cells) sustains the load curve through the lower charge states. If shutdowns persist after the calibration cycle, confirm the BIOS is not set to an aggressive low-battery shutdown threshold in the Power Management settings.

BIOS reporting new battery health as "poor" immediately after swap

The BIOS carries EEPROM data from the old cell and compares the new cell's reported capacity against that stored baseline. A mismatch flags the health status as poor or unknown — this is not a fault in the replacement cell. Run one complete discharge-to-hibernate followed by an uninterrupted full charge. This forces the BIOS to re-learn the cell's actual capacity curve and overwrite the stale EEPROM values. After one to two full cycles, the health indicator should update to a normal status.