As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3847 THE CREW REPORTED, NOTICED THE MAIN AND APU BATTERY SWITCH IN ON POSITION. TWO EMERGENCY FLASHLIGHTS WERE FOUND TO BE DEAD. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED MAIN BATTERY AND THE SYSTEM OPERATIONAL CHECK WAS GOOD IAW CRJ AMM 24-32-01. FOUND FLASHLIGHTS INSTALLED IN CRADLE IN CORRECTLY. REINSTALLED AND THE FLASHLIGHTS OPERATE NORMALLY. THE AIRCRAFT WAS RETURNED TO SERVICE.