As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ANNUAL INSPECTION, MECHANIC NOTICED BATTERY MODEL NUMBER WAS LABELED G-241. THIS LABEL WAS INCORRECT FOR THE TYPE OF BATTERY AND POST LOCATION. NOTIFIED GILL BATTERY WITH BATTERY SERIAL NUMBER AND VERIFIED THAT INSTALLED BATTERY WAS AG-641 AND IT DID CONFORM TO THE STC FOR THIS INSTALLATION. GILL PROVIDED A NEW LABEL AND A LETTER. AIRCRAFT WAS RETURNED TO SERVICE.