As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JAN - FLT 3350 - CREW REPORTED EMERGENCY LIGHT BATTERY NOT ABLE TO TAKE CHARGE. EMERGENCY EXIT LIGHTS DO NOT WORK. MAINTENANCE REMOVED AND REPLACED THE BATTERY PACK IN POWER SUPPLY UNIT 43WL. OPS CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)