As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BATTERY IS WEAK. CHARGED BATTERY, PERFORMED FIRST CAPACITY CHECK, FAILED AFTER 26 MINUTES. RECHARGED WITH CONDITIONING CHARGE OF C1/10. BATTERY FAILED SECOND CAPACITY CHECK AFTER 48 MINUTES. REPLACED BATTERY WITH NEW PART. RETURNED FOR WARRANTY CONSIDERATION.