What was found
DURING C4/S1 CHECK, INSPECTION REPORTED "TEST EMERG LIGHT BAT" BATTERY CAPACITY CHECK FAILED. REMOVED AND REPLACED EMERGENCY EXIT BATTERIES IAW AMM 33-51-38-PB401. OPERATIONAL CHECK GOOD IAW 33-51-00-710-001, (S/N'S 26827, 24286, 26936, 042015).