As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ELT BATTERY REPLACEMENT, NOTED ELT WAS INOPERATIVE WHEN BATTERY COVER WAS INSTALLED. UNIT CHECKED OK WITH COVER REMOVED. FOUND METAL COVER SEPARATING BATTERY FROM ELT. ELECTRONICS WAS GETTING DISPLACED BY BATTERY CAUSING THE ELT TO BE INOPERATIVE. REMOVED COVER, APPLIED POLYURETHANE TAPE ON INSIDE OF COVER, AND RE-INSTALLED. FUNCTION CHECK OK.