As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BATTERY DISHCHARGE LIGHT ILLUMINATED ON PUSHBACK. ACFT GROUNDED. PERFORMED BATTERY DISCHARGE FIM 24-31, TASK 833. FAULT WILL NOT RESET. REF FAULT ISOLATION PROCEDURE, R & R BATTERY CHARGER M5, REF MM 24-31-21. GROUND VERIFICATION CHECKS NORMAL.