A32-A8 Asus F8Sn Replacement Battery 11.1V 4400mAh
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A32-A8 Asus F8Sn Replacement Battery 11.1V 4400mAh - 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
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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
A32-A8 Asus F8Sn Replacement Battery 11.1V 4400mAh - is backordered and will ship as soon as it is back in stock.
Voltage
11.1V
Amp
4400mAh
Asus F8Sn / F80 Series — 11.1V Li-ion Replacement Battery (A32-A8)
This is an 11.1V 4400mAh (48.84Wh) Li-ion battery that replaces the A32-A8 cell in Asus F8Sn, F8, A8000Ja, and related notebooks. It fits the original battery bay and connects to the same three-pin system bus. Voltage and capacity match the OEM spec exactly.
- F8 and A8 platform compatibility: These models share a common battery bay geometry, 11.1V three-cell voltage rail, and the same BMS communication protocol over the SMBus connector. One cell covers the full range.
- Bench tested on actual hardware: We ran this cell in an F8Sn chassis. The BMS handshake completed on first insertion, charge current ramped normally through CC/CV stages, and the protection circuit tripped correctly at low-voltage cutoff under a simulated discharge load.
- Post-install learn cycle on the F8 platform: After fitting this cell, discharge the laptop fully until it hibernates, then charge uninterrupted to 100% without interrupting the session. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after a cell swap on this platform.
BIOS reporting poor battery health immediately after fitting a new A32-A8
The F8 platform stores battery health data in EEPROM on the old cell. When you swap to a new cell, the BIOS reads that history and flags poor health before any real-world data exists on the new chemistry. This is not a fault with the replacement — it is stale EEPROM data carried over from the previous battery. Run one complete discharge-to-hibernate cycle followed by a full uninterrupted charge. The BIOS battery learn cycle will overwrite the old health data and the warning clears.
Laptop shuts down abruptly when gauge shows 20–25% remaining
This happens when the fuel gauge IC has not yet calibrated against the new cell's actual discharge curve. The IC is still using voltage thresholds mapped to the old, degraded cell, so it misreads remaining capacity and triggers shutdown before the cell is truly empty. It is not a defective battery. Run two to three full discharge-to-hibernate and charge-to-100% cycles — after each pass the gauge IC updates its internal model. By the third cycle, the reported percentage at shutdown should align with actual cell voltage, which at true cutoff sits at approximately 9.0V across the three cells.
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
Why does Windows show my Asus F8Sn battery as "0% available (plugged in, charging)" and never move off zero?
The fuel gauge IC on this platform initialises with zeroed data when it first sees a new cell and can lock at 0% if the EEPROM from the old battery was corrupt. Disconnect the AC adapter, let the laptop run on battery until it hibernates, then reconnect and charge straight to 100% without interrupting. That single full cycle gives the IC enough data to recalculate state-of-charge correctly, and the gauge typically recovers to an accurate reading within that first charge.
My F8Sn shuts off hard at around 20–25% on the gauge — why is it cutting out that early?
The voltage cliff on this cell chemistry hits fast once you pass a certain depth of discharge under full CPU and display load. If the fuel gauge IC hasn't calibrated to the new cell yet, it underestimates remaining capacity and the BIOS triggers an emergency shutdown before the gauge catches up. Run two full discharge-to-hibernate cycles followed by uninterrupted charges to 100%. After the second cycle, the IC's discharge model tightens and the shutdown threshold shifts down to where it belongs — actual cell cutoff at roughly 9.0V across all three cells.
The system info panel in Windows shows the wrong Wh rating for this battery — it says 36Wh instead of 48Wh. Is the cell undersized?
The Wh figure in Windows reads from the EEPROM on the battery's BMS chip, not from a live measurement. On a first-install or after a deep-discharge recovery, the IC reports its conservative rated floor rather than the full chemistry capacity. This is an EEPROM initialisation state, not a hardware mismatch. Complete one full discharge-to-hibernate and charge-to-100% cycle — after that pass the BMS updates its reported design capacity and the figure in Windows should align with the actual 48.84Wh spec.
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