As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE INSPECTION FOUND THE AFT EMERGENCY LIGHTS WOULD NOT SHUT OFF. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED & REPLACED THE NR 4 BATTERY CHARGER AND BATTERY IAW CRJ 700 AMM 33-51-17. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.