Asus Eee PC 901 Replacement Battery AL23-901 7.4V 6600mAh
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Asus Eee PC 901 Replacement Battery AL23-901 7.4V 6600mAh - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
Battery Care Tips
🔹 Getting Started
Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.
🔹 Keep It Healthy
Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.
Delivery and Shipping
Delivery and Shipping
🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.
Disclaimer
Disclaimer
⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.
🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
Asus Eee PC 901 Replacement Battery AL23-901 7.4V 6600mAh - is backordered and will ship as soon as it is back in stock.
Voltage
7.4V
Amp
6600mAh
Asus Eee PC 901 / 1000 Series — 7.4V Li-ion Replacement Battery (AL23-901)
This is a 7.4V, 6600mAh (48.84Wh) Li-ion battery for the Asus Eee PC 901, 904, 904HD, and 1000 series netbooks. It replaces OEM part numbers AL23-901, AL24-1000, AP23-901, and 870AAQ159571. If your original cell holds no charge or the system won't run off battery at all, this is the direct cell swap.
- Eee PC 901 / 904 / 1000 platform fit: These models share the same 7.4V two-cell Li-ion architecture, identical connector pinout, and compatible BMS handshake protocol — which is why one cell covers all of them. Swapping between any of these models uses the same physical latch and charge circuit.
- Bench tested on actual hardware: We cycled this cell on an Eee PC 901 unit and confirmed the BMS communicates correctly with the BIOS — charge current ramps normally, the cell reports capacity data, and no error flags tripped at any point during the charge-discharge cycle.
- First-cycle calibration on the Eee PC: After installing, run one full discharge down to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that typically appears after every cell swap on these netbooks.
BIOS reporting battery health as poor after swapping cells on the Eee PC 901
The Eee PC BIOS reads health data from EEPROM registers built into the battery's BMS, not from live voltage alone. When a new cell arrives with factory-default EEPROM values, the BIOS compares them against calibration data from the old cell and flags a mismatch as poor health. This is not a defective cell — it's a calibration state. Run one full discharge-to-hibernate then a full uninterrupted charge, and the BIOS learn cycle overwrites the stale reference data with accurate figures from the new cell.
Eee PC shutting down at 20–30% battery shown on screen
The fuel gauge IC inside the battery calculates remaining charge based on a voltage-to-capacity curve calibrated to the previous cell's chemistry. After a cell swap, that curve is misaligned — the gauge reads 25% while the actual cell voltage has already hit the low-voltage cutoff. Under combined CPU and display load, voltage drops faster than the gauge tracks, and the BMS cuts power before the OS can write a hibernate file. Run two full discharge-to-charge cycles to force the fuel gauge IC to recalibrate against the new cell. After two cycles, the shutoff should align with the display — typically below 5% at around 6.8V under load.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Asus
- Manufacturer: CS
- Series: Standard
- Color: Black
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My Eee PC 901 shows the new battery as 0% or "unknown" in Windows immediately after fitting — is the cell dead?
It's not dead. The Windows fuel gauge reads EEPROM data from the battery's BMS, and a factory-fresh cell ships with default register values that don't match the OS's expected charge state. Plug in the AC adapter and let the cell charge uninterrupted to 100% without interruption. After one full charge-discharge cycle, the EEPROM registers update and Windows reports an accurate percentage.
The Eee PC 1000 BIOS shows a lower Wh rating than the 48.84Wh listed — why does the number not match?
The Wh figure the BIOS displays is pulled from a static EEPROM register written at the factory, while the actual chemistry in the cell determines real-world capacity. These two values frequently differ on third-party cells because the EEPROM is programmed to match the OEM nominal spec, not the exact measured output of each individual cell batch. The discrepancy does not affect charging or discharge behaviour. Verify the actual voltage under load with a multimeter — a healthy cell under light load should read above 7.2V.
New battery charges to 100% once, but every charge after that stops at around 80% — what changed?
The Asus Eee PC BIOS includes a charge-limit firmware setting that activates after the first full cycle on some units — it caps charging at 80% to reduce long-term cell stress. This is a BIOS-controlled function, not a fault with the cell itself. Enter the BIOS setup utility (F2 at boot), navigate to the Power section, and check whether a battery charge limit or "Battery Life" mode is enabled — disable it to restore full 100% charging.
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