As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING B INSPECTION FOUND THE NR 3 EMERGENCY BATTERY INOPERABLE. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE NR 3 BATTERY IAW CRJ AMM 33-51-17. THE OPERATIONAL CHECK WAS GOOD IAW CRJ AMM 33-51-17-710-801. THE AIRCRAFT WAS RETURNED TO SERVICE.