As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TESTED BOTH UPPER DOOR SLIDE BATTERY AND FWD TEST FAIL. TRIED NEW BATTERY, NO HELP. TOOK BATTERY FROM ANOTHER SPOT AND TEST PASS. BAD BATTERY FROM SUPPLY. BAD BATTERY STILL IN ACFT IN OVERHEAD FWD CEILING PANEL BETWEEN UPPER DECK DOORS. REPLACED UPPER DECK, RT DOOR BATTERY, OPS CK OK.