As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FIRST FEW WEEKS OF FLYING, BEGAN TO BLOW ONE MAIN 325 AMP CURRENT LIMITS. BATTERY WAS NOT DUE ANY MAINTENANCE, BUT REMOVED AND BENCH CHECKED IT BECAUSE OF POSSIBLE HIGH CURRENT DRAW. FOUND CELL NR 9 TO NOT MEET SPECS. IN RELATION TO MM CAP CHECK. THIS WAS ADVERTISED AS A MAINTENANCE BATTERY.