As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED. BATTERY AT WELL UNIT 24 AND 11.4 IS NOT TESTING, PER TASK CARD 2803. REPLACED WELS UNIT BATTERY AT WCU 11.4 (AALA202010279018) AND WCU 24 (AALA202010299004), PER AMM 33-51-07. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.