About this replacement
HP Chromebook 11A Series — 7.6V Li-Polymer Replacement Battery (FO02XL)
This 7.6V, 4600mAh (34.96Wh) Li-Polymer battery replaces the OEM FO02XL cell in the HP Chromebook 11A lineup. It fits the Chromebook 11A-NA, 11A-NA0015WM, 11A-NA0500NA, and over 29 additional variants in the same family. All units also cross-reference part numbers L97355-005, L97353-2D1, and TPN-DB0A.
- Chromebook 11A family compatibility: Every model in this series runs the same 7.6V two-cell Li-Polymer architecture with an identical connector pinout and BMS handshake protocol. HP used a single battery platform across the entire 11A-NA range, so one cell covers all listed variants without modification.
- Bench tested on actual hardware: We cycled this cell through full charge and discharge on the Chromebook 11A platform. The BMS negotiated correctly with ChromeOS at every stage — charge acceptance, temperature monitoring, and low-voltage cutoff all triggered at expected thresholds.
- Post-install calibration on the Chromebook 11A: After fitting this cell, run one full discharge to the hibernate cutoff, then charge uninterrupted to 100%. ChromeOS carries EEPROM data from the old cell and will display inaccurate health warnings until the EC completes a fresh battery learn cycle against the new chemistry.
Why the Chromebook 11A shuts down at 20–30% after a battery swap
The embedded controller maps the discharge curve against data stored during previous cycles. A new cell has a different internal resistance profile than the aged unit it replaces. Under combined CPU and display load, the EC hits its voltage floor earlier than the fuel gauge predicts, triggering an immediate shutdown. Running two to three full discharge-to-hibernate cycles lets the EC re-learn where the actual voltage cliff sits on the new cell. After calibration, the reported percentage and the real remaining capacity align correctly.
ChromeOS reporting "unknown battery" or 0% immediately after installation
This is an EEPROM mismatch — ChromeOS reads battery identity data written by the factory to the old cell's fuel gauge IC, and the new cell starts without matching records. The EC flags the battery as unrecognised and holds the state-of-charge at 0% until it can confirm capacity. Plug in the charger and leave the device powered on for a full uninterrupted charge. Once the EC logs a complete charge cycle against the new cell, the battery identifier clears and ChromeOS displays the correct percentage.