As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PREFLIGHT INSP, AIRCREW NOTICED THE EMERGENCY FLOOR LIGHTING FROM ROWS 1 THROUGH 4 INOPERATIVE. MX CREW FOUND THE PS5 EMERGENCY BATTERY PACK WEAK. BATTERY PACK WAS R & R. PERFORMED OPS CHECK OF THE EMERGENCY LIGHTING SYSTEM. SYSTEM CHECKED SATISFACTORY. ACFT RETURNED TO FLIGHT STATUS.