As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN BATTERY AND MAIN CHARGER EICAS MESSAGE WITH ACCOMPANIED 'NO LAND THREE'. AIRCRAFT RETURNED TO LAX. THE MAIN BATTERY CHARGER AND OVERHEAD BATTERY SWITCH WERE INITIALLY REPLACED. THE CORRECTIVE ACTION WAS MAIN BATTERY REPLACEMENT.THE MAIN BATTERY CHARGER TESTED WITH NO FAULTS FOUND. PRELIMINARY VENDOR REPORT INDICATES A BATTERY FAILURE DUE TO A SHORTED CELL.