As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - CREW REPORTED BATTERY DISCHARGE LIGHT ILLUMINATED DURING FLIGHT. EMERGENCY DECLARED FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED BATTERY CHARGER AND BOTH MAIN SHIP BATTERIES (MPN 023964000). SYSTEM GROUND CHECK NORMAL OPERATION.