As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN BATTERY CHARGER STATUS MESSAGE CAME ON AFTER TAKEOFF. RETURNED TO DFW. SWAPPED APU BATTERY CHARGER S/N 2248 AND MAIN BATTERY CHARGER S/N 1973 FOR TROUBLESHOOTING IAW MM 24-32-03. REMOVED AND REPLACED MAIN BATTERY IAW MM 24-32-01. OPS CHECK GOOD AT THIS TIME.