As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - DURING SCHEDULED MAINTENANCE, THE EMERGENCY LIGHT BATTERY PACK AT POSITION 10 WL WAS FOUND TO BE LOW. MAINTENANCE REMOVED AND REPLACED THE AFFECTED BATTERY PACK. THE LIGHTING SYSTEM OPERATIONALLY CHECKED GOOD AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. (X)