As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON ARRIVAL, FOUND COCKPIT FULL OF SMOKE. CABIN HAD SOME SMOKE VISIBLE WITH A SMOKEY ODOR. A/C BATTERY WAS ON POWER AND AIR WAS PROVIDED BY GRD UNITS. OPENED E+E ACCESS DOOR FOR T/S CKD E+E DOOR. REMOVED AND REPLACED BATTERY CHARGER AND BATTERY CHARGER RELAY R2-56. BATTERY CHARGER OPS NORMAL. STARTED APU TO DRAW DOWN BATTERY. BATTERY VOLTAGE AND AMPS CHECK NORMAL.