As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED THAT EN ROUTE BETWEEN KLG AND ANC THAT THE NR 1 BATTERY TEMP ANNUNCIATOR ILLUMINATED. PERFORMED BATTERY DISCONNECT PROCEDURE PER THE CASA AFM SECTION 2-8. REMAINDER OF TRIP REPORTED UNEVENTFUL. MAINTENANCE DISCHARGED BATTERY AND FOUND ONE OF THE CELLS SHORTED INTERNALLY. BYPASSED CELL AND CONTINUED DISCHARGE OF BATTERY WITH NO OTHER FAULTS.