About this replacement
Asus Eee PC 701 Series — 7.4V Li-ion Replacement Battery (A22-700)
This is a 7.4V, 5200mAh Li-ion replacement battery for the Asus Eee PC 701 netbook and its close variants. It replaces OEM part A22-700 and fits the Eee PC 701, 701C, 800, 801, and over a dozen related models. Capacity is rated at 38.48Wh — drawn from the cell spec, not rounded.
- Eee PC 700 and 800 platform fit: These models share the same battery bay dimensions, 7.4V two-cell Li-ion architecture, and connector pinout. The BMS handshake protocol is identical across the 701, 701C, 800, and 801, so one cell works across all of them without adapter or modification.
- Bench tested on actual hardware: We ran this cell on an Eee PC 701 and confirmed the BMS completed charge initialisation, the BIOS detected the battery at full capacity, and the protection circuit tripped correctly at low-voltage cutoff. No mid-cycle BMS lockout occurred.
- Post-install calibration on the Eee PC 701: After fitting, run one full discharge until the netbook hibernates, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.
Why the Eee PC 701 BIOS reports poor battery health after a cell swap
The Eee PC 701 stores battery health data in EEPROM on the old cell. When a new battery is fitted, the BIOS reads no learned data and flags the cell as degraded or unknown — even if the new cell is at full capacity. This is a data mismatch, not a hardware fault. Running one complete charge and discharge cycle writes new baseline data to the BIOS and clears the warning. After two or three cycles, the reported health figure stabilises to reflect the actual cell condition.
Eee PC 701 shutting down at 20–30% charge shown on screen
This happens when the fuel gauge IC has not yet calibrated against the new cell's discharge curve. The old cell's curve is stored in firmware — the new cell hits a voltage cliff earlier than the IC expects, triggering an abrupt shutdown before the displayed percentage reaches zero. It is not a faulty battery. Force a full discharge to hibernate cutoff, then charge to 100% without interruption. Repeat this once more and the gauge IC recalibrates — shutdowns at false percentages stop after two full cycles.