As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOR FLIGHT 2805 THE RAMP REPORTED SMOKE COMING FROM THE BATTERY COMPARTMENT AREA. WHEN TURNING THE BATTERIES ON SMOKE BEGAN TO COME FROM THE BATTERY COMPARTMENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. FOUND THE NR 2 MAIN BATTERY CABLE ARCING AT THE BATTERY CONNECTOR. REMOVED AND REPLACED THE NR 2 MAIN BATTERY DISTRIBUTION BOX CABLE REF EMB 145 AMM 24-36-03. THE AIRCRAFT WAS RETURNED TO SERVICE.