About this replacement
Acer Aspire One Cloudbook 14 — 11.4V Li-Polymer Replacement Battery (AP15H8I)
This is an 11.4V, 4700mAh (53.58Wh) lithium-polymer replacement battery for the Acer Aspire One Cloudbook 14 series, including the AO1-431, AO1-431M, and AO1-431-C139. It replaces OEM part numbers AP15H8I and KT.0030G.008. The battery slides into the original bay with the same connector and BMS handshake as the factory cell.
- Cloudbook 14 series compatibility: The AO1-431 and AO1-431M share the same 11.4V three-cell Li-Polymer architecture, connector pinout, and BMS communication protocol. One replacement battery covers the full Cloudbook 14 range without adapter modification.
- Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on the AO1-431 platform. The BMS handshake completed correctly, charge termination triggered at 100%, and the protection circuit responded normally to low-voltage cutoff conditions.
- Post-swap calibration on the Cloudbook 14: After fitting this battery, run one complete discharge until the laptop hibernates on low-battery cutoff, then charge uninterrupted to 100%. This forces the Cloudbook's BIOS battery learn cycle to reset against the new cell's actual capacity and clears the false "poor health" warning that commonly appears after every cell swap.
BIOS reporting poor battery health immediately after fitting a new cell
The Acer Cloudbook 14 BIOS reads health data stored in the battery's EEPROM. When you swap cells, the EEPROM on the new battery has no charge history, so the BIOS interprets this as a degraded or unknown cell. This is a data gap, not a battery fault. Running one complete discharge-to-hibernate followed by a full uninterrupted charge gives the fuel gauge IC enough data to update the EEPROM and report accurate health figures — typically within two to three full cycles.
Laptop shuts down abruptly at 20–30% charge shown on screen
This is a voltage cliff issue. When the fuel gauge IC has not yet calibrated against the new cell's discharge curve, it overestimates remaining capacity at mid-range and then hits the actual low-voltage cutoff threshold suddenly. The BMS cuts power to protect the cells before the OS can gracefully hibernate. To fix this, complete two full discharge-to-cutoff and charge-to-100% cycles so the fuel gauge IC maps the real voltage curve. After calibration, the gauge tracks accurately and the abrupt shutdowns stop.