What was found
RIGHT HAND OVERWING EMERGENCY EXIT IDENTIFIER SIGN, DOES NOT ILLUMINATE DURING MX, EMERGENCY LIGHT OPERATIONAL TEST. REMOVED AND REPLACE CENTER FUSELAGE II, FWD EMERGENCY LIGHT BATTERY (#3 BATT) REF E190AMM 33-50-01. PERFOMRED CABIN EMERGENCY LIGHT TEST, ALL TESTS PASSED. NO DEFECTS NOTED AT THIS TIME.