As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHT POWER SUPPLY INOPERATIVE. INSPECTED THE POWER SUPPLY AND FOUND THE BATTERY TO HAVE BECOME DISSCONNECTED. CONNECTED THE BATTERY, AND OPS CHECKED GOOD. WORK DONE IAW AMM 33-50-04-400-802-A. NO FURTHER DEFECTS NOTED AT THIS TIME.