About this replacement
Asus K93 / A93 Series — 10.8V Li-ion Replacement Battery (A32-K93)
This is a 10.8V, 4400mAh (47.52Wh) Li-ion replacement battery for Asus K93, K93S, K93SV, A93, and related notebook models. It slots into the original battery bay and connects via the same multi-pin connector used across this Asus chassis family. OEM part numbers A32-K93, A42-K93, and A41-K93 all apply to this cell group.
- K93 / A93 platform fitment: Asus shared the same battery bay dimensions, voltage rail, and BMS handshake protocol across the K93 and A93 chassis lines. One cell covers all three OEM part numbers because the connector pinout and communication protocol did not change between revisions.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a K93SV board. The BMS negotiated correctly at first contact, the fuel gauge IC began tracking state-of-charge within the first cycle, and charge termination fired cleanly at full capacity.
- Post-install calibration for the K93: After fitting, run the laptop on battery until it reaches hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears on the first boot after a cell swap.
Why the K93 BIOS reports poor battery health after a cell swap
The K93 BIOS reads health data from EEPROM embedded in the original battery pack. When a new cell arrives, that EEPROM contains factory defaults — not real cycle data — so the BIOS flags the battery as degraded or unknown. This is not a fault with the replacement cell. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% gives the fuel gauge IC enough data to overwrite those defaults. After two to three cycles the BIOS health indicator corrects itself.
Laptop shuts down at 20–30% charge shown on the K93
This happens when the fuel gauge IC is still calibrating against the new cell's voltage curve. The old cell's discharge profile is stored in firmware, so the gauge misreads the new cell's actual voltage cliff. Under full CPU and display load, the system hits the real low-voltage cutoff before the displayed percentage reaches zero. Discharge fully to hibernate-cutoff once, then recharge to 100% — the gauge recalibrates and the shutdowns stop. Verify the pack is holding above 10.2V under load before assuming a fault.