Asus Eee PC 1015 Replacement Battery 10.8V 4400mAh A31-1015

Asus Eee PC 1015 Series — 10.8V Li-ion Replacement Battery (A31-1015)

This 10.8V, 4400mAh (47.52Wh) Li-ion battery replaces the original cell in the Asus Eee PC 1015 netbook family. It fits the 1015, 1015P, 1015PE, 1016, and over 40 additional variants sharing the A31-1015 / A32-1015 OEM part numbers. Voltage and connector match the stock spec exactly.

• 1015 series compatibility: Every model in this family runs the same 10.8V battery rail with an identical three-cell configuration and the same physical connector and latch geometry. One part number covers the full lineup because Asus kept the power architecture consistent across the 1015 and 1016 range.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the 1015PE platform. The BMS communicated correctly with the EC controller, current tapered normally at end-of-charge, and the protection circuit tripped at the expected low-voltage cutoff without needing a manual reset.
• First-cycle calibration on the Eee PC: After fitting, run a single full discharge to hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery-learn cycle and clears the inaccurate health warning the EC flags after every cell swap.

BIOS reporting battery health as poor immediately after replacement

The Eee PC EC stores charge history and wear data from the old cell in its learn registers. When a new cell goes in, those registers still reflect the degraded profile of the original battery. The BIOS reads that stored data — not the physical state of the new cell — and flags poor health straight away. One complete discharge-to-hibernate then uninterrupted charge-to-100% cycle forces the EC to rewrite those registers against the new cell's actual capacity. After that cycle, the health indicator clears.

Netbook shutting down abruptly at 20–30% charge shown

This happens when the fuel gauge IC has not yet calibrated its discharge curve against the new cell's chemistry. The gauge estimates state-of-charge using data it learned from the old, degraded cell, so it reads 25% while the actual cell voltage has already dropped below the safe operating threshold. Under combined CPU and display load, the voltage cliff arrives fast and the EC shuts down to protect the cell. Run two full discharge-to-hibernate and charge-to-100% cycles — by the third cycle the fuel gauge IC recalibrates and the remaining-charge readout stabilises. Check that the resting voltage after a full charge reads at or above 12.4V before resuming normal use.