As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE INBOUND TO SNA THE AIRCRAFT RADIOS WENT DEAD AND THE BATTERY WENT DEAD. THE PILOT CONTACTED SNA TOWER USING HIS CELL PHONE AND WAS CLEARED TO LAND. AFTER LANDING IT WAS DISCOVERED THE ALTERNATOR DRIVE BELT FAILED AND THE AIRCRAFT WAS RUNNING ON BATTERY POWER UNTIL THE BATTERY WAS DRAINED.