As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AT THE GATE SMOKE WAS SEEN COMING FROM THE ELECTRONIC COMPARTMENT. SHIPS BATTERY WAS HOT TO TOUCH AND EVENTUALLY SPARKING. AMPS WERE CHARGING THEN DISCHARGING EVERY FEW SECONDS. TURNED BATTERY SWITCH OFF. REPLACED BOTH SHIPS BATTERIES (P/N 30475-002), AND THE BATTERY CHARGER (P/N 26340061-06). CHECK-C 3-30-00 STL.