As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4588 THE CREW REPORTED THE EMERGENCY EXIT LIGHTS WERE INOPERATIVE. THE BATTERIES APPEARED TO BE COMPLETELY DISCHARGED. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE 4 BATTERY PACKS IAW CRJ AMM 33-51-17. PART NUMBER 2013-1A. SERIAL NUMBERS: #1 103864, #2 107233, #3 108810, #4 104939. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.