A32-K53 Asus A53B Replacement Battery 11.1V 4400mAh
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A32-K53 Asus A53B 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.
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Disclaimer
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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
A32-K53 Asus A53B Replacement Battery 11.1V 4400mAh - is backordered and will ship as soon as it is back in stock.
Voltage
11.1V
Amp
4400mAh
Asus A53B / K53 Series — 11.1V Li-ion Replacement Battery (A32-K53)
This is an 11.1V 4400mAh (48.84Wh) Li-ion battery for the Asus A53 and K53 series laptops. It fits the A53B, A53BY, A53E, A53F, and hundreds of related A53/K53 variants using the A32-K53, A42-K53, or A41-K53 OEM part numbers. Install it when the factory cell no longer holds a usable charge through a normal work session.
- A53 and K53 platform fit: These models share the same battery bay dimensions, 11.1V three-cell rail, and six-pin connector pinout. The BMS handshake across A53 and K53 variants uses the same EEPROM protocol, so one cell covers the full range without firmware conflicts.
- Bench tested on actual hardware: We ran this cell on an A53E and K53SV. The BMS accepted the handshake on first insertion, charge initiation triggered within 30 seconds, and the protection circuit tripped correctly at both over-voltage and thermal limits during load cycling.
- Post-swap discharge cycle on Asus BIOS: After fitting this cell, run one full discharge to hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning the firmware flags after every cell replacement.
Why the A53 BIOS flags a new battery as poor health immediately after swap
The Asus BIOS reads EEPROM data written by the original factory cell to track charge history and rated capacity. A new cell arrives with blank or factory-default EEPROM values that do not match the laptop's stored baseline, so the firmware interprets this as a degraded or unknown unit. This is a data mismatch, not a fault with the replacement cell. Running one full discharge-to-hibernate followed by a complete uninterrupted charge gives the BIOS enough data to rewrite its baseline and clear the warning.
A53 shutting down abruptly while OS shows 20–30% remaining
This happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The IC is still using discharge curve data from the old, degraded cell, so it misjudges remaining capacity and the laptop hits the real voltage floor before the OS expects it. Under full CPU and display load, voltage sag accelerates this cliff. Run two to three full discharge-to-hibernate cycles and the fuel gauge IC will recalibrate to the new cell — the shutdowns stop once calibration converges around the correct 9.0V cutoff point.
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 my Asus A53 show the battery as "unknown" or 0% in Windows right after fitting the new cell?
The Windows fuel gauge IC is still reading EEPROM data from your old battery and cannot match it to the new cell's chemistry signature. This shows up as 0%, "unknown device," or a missing battery icon even though the cell is seated and charging. Run one full discharge to the point the laptop hibernates, then charge uninterrupted to 100%. After that cycle the OS fuel gauge will re-initialise against the new cell's actual data.
The Asus BIOS is reporting the wrong Wh rating — it says 47Wh or some other figure instead of 48.84Wh. Is the battery faulty?
No — the Wh figure the BIOS displays is pulled from the EEPROM stored on the cell, and that value is sometimes written at the rated chemistry baseline rather than the measured capacity of the specific batch. The actual deliverable energy from this 4400mAh cell at 11.1V is 48.84Wh. The discrepancy is a data display issue, not a capacity fault. If the figure bothers you, check it again after two full calibration cycles — some Asus BIOS versions update the displayed value once the learn cycle completes.
New battery charges fine but the A53 still cuts out under load — CPU-intensive tasks or video playback triggers a sudden shutdown with charge showing above 15%.
This is a voltage sag issue. Under simultaneous CPU, GPU, and display load, the cell's internal resistance causes a momentary voltage drop that crosses the BMS low-voltage cutoff threshold before the fuel gauge catches up. It is most common in the first few cycles before the fuel gauge IC has calibrated to the new cell. Run two full discharge-to-hibernate cycles to let the IC map the new cell's voltage curve — after calibration the BIOS adjusts its shutdown trigger to the correct floor, which for this 11.1V cell is approximately 9.0V under load.
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