As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L/H LWR EMERGENCY LIGHT BY OVERWING EXIT WILL NOT ILLUMINATE. AIRCRAFT REMOVED FROM SERVICE FOUND BATTERY PACK PS2LY TO HAVE LOW VOLTAGE. CHARGED DEPLETED EMERGENCY BACK REF AWAC SUPPLEMENT 15-220B. PERFORMED SELF TEST OF EMERGENCY BATTERY PACK/CHARGER ASSY IAW CRJ-200 AMM 33-51-04-740-005 NO DEFECTS NOTED.