About this replacement
Acer Aspire E5-422 / E5-472 Series — 14.8V Li-ion Replacement Battery (AL15A32)
This is a 14.8V, 2200mAh (32.56Wh) Li-ion battery for the Acer Aspire E5-422, E5-422G, E5-472, E5-472G, and over 230 compatible Aspire models. It replaces OEM part numbers AL15A32, KT.00403.025, KT.004B3.025, and KT.00403.034. If your original cell no longer holds a usable charge, this restores cordless operation to the machine.
- E5-422 and E5-472 platform fit: Both the E5-422 and E5-472 lines share the same 14.8V four-cell battery architecture and identical connector pinout. The BMS handshake protocol is consistent across these chassis, so one cell works across both variants without modification.
- Bench tested on actual hardware: We ran this cell through charge-discharge cycles on E5-422 hardware. The BMS communicated correctly with the BIOS, accepted a full charge without cutoff errors, and held voltage under sustained CPU and display load without triggering an unexpected shutdown.
- First-install calibration on the Aspire E5 series: After fitting this battery, run one full discharge until the laptop hibernates on low power, then charge it uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on these Aspire models.
BIOS reporting battery health as poor immediately after fitting a new cell
The Aspire E5 BIOS reads health data from the battery's EEPROM, which stores charge cycle history and rated capacity from the previous cell. When you swap in a new battery, the BIOS compares the new cell's EEPROM data against its stored baseline and flags a mismatch as poor health. This is not a fault with the replacement cell — it is stale data. Running one complete discharge-to-hibernate followed by a full uninterrupted charge allows the BIOS to rewrite its baseline and clear the warning. After two to three cycles, the health indicator should read normal.
Laptop shutting down at 20–30% charge shown on screen
This happens when the cell voltage drops below the BMS cutoff threshold before the fuel gauge reaches zero. Under full CPU and display load, the Aspire E5 draws enough current to expose a voltage sag that the gauge IC did not predict from its stored discharge curve — so the machine cuts out while the OS still shows charge remaining. The fuel gauge IC needs calibration cycles against the new cell's actual chemistry to recalculate that curve. Run three full discharge-to-hibernate and charge-to-100% cycles and the shutdown point will shift back toward 5% or lower. After calibration, resting cell voltage at the reported 20% mark should read above 14.4V.