What was found
IN FLIGHT, DURING CRUISE, WITH THE EMERGENCY LIGHT SWITCH IN THE ARM POSITION, THE EMERGENCY LIGHTS IN THE CABIN ILLUMINATED. CYCLED THE SWITCH FROM ARM TO OFF, THEN BACK TO ARM. THE LIGHTS EXTINGUISHED. AFTER LANDING, DURING TAXI IN, WITH THE EMERGENCY LIGHT SWITCH IN THE ARM POSITION, THE EMERGENCY LIGHTS IN THE CABIN ILLUMINATED AGAIN. TRIED CYCLING THE EMERGENCY LIGHT SWITCH TO OFF, THEN BACK TO ARM. EMERGENCY LIGHTS ILLUMINATED AGAIN WHEN THE SWITCH WAS PLACED IN THE ARM POSITION. TRIED CYCLING THE SWITCH TO ON, THEN TO OFF, THEN BACK TO ARM. THE LIGHTS ILLUMINATED AGAIN WHEN SWITCH WAS RETURNED TO THE ARM POSITION. REMOVED AND REPLACED FWD AND AFT EMERGENCY BATTERIES IAW EMB505AMM 33-52-01, CHECKED GOOD. NO DEFECTS NOTED.