As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
POWER SUPPLY BATTERY PACK CAPACITY CHECK PROCEDURE, DURING EMERGENCY LIGHT FUNCTION CHK, FOUND BATTERY PACK FUNCTION LESS THAN 15 MIN AT DOOR 5R M33409. REPLACED A NEW BATTERY PACK IN M33409 POSITION AND CHK FUNCTION NORMAL IAW AMM 33-51-06.