As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING ANNUAL PERFORMANCE TEST IT WAS NOTICED THAT DURACELL MN1300 BATTERIES DATED MAR 2010 WERE LEAKING WHAT APPEARED TO BE BATTERY ACID. WHEN THE VOLTAGE OF THE BATTERIES WAS CHECKED IT WAS FOUND THAT THE AFFECTED BATTERIES WERE BELOW TWO VOLTS. ELT BATTERY CASE WAS CLEANED AND FULL SET OF NEW BATTERIES WERE INSTALLED. ELT WAS FUNCTIONAL TESTED AND FOUND TO BE MEET MANUFACTURERS SPECIFICATIONS.