As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELECTRICAL ODOR OF SHORT DURATION SMELLED. MAIN BAT STATUS MSG AND BAT CHARGER MAIN SHOW ON SCREEN. *S/D* MAINTENENCE STATUS MESSAGE 24-13054 FOR MAIN BATTERY WAS DISPLAYED. REPLACED MAIN BATTERY AND ACCOMPLISHED OPERATION CHECK PER MM 24-30-00. VENDOR (ACME) DISASSEMBLED BATTERY (P/N: 263BA101-2) AND FOUND ONE OF THE CELLS SHORTED WITH 0 VDC.