What was found
ON POST-FLIGHT INSPECTION, FOUND THE BATTERY VOLTAGE TO BE ZERO. AFTER CONSULTING WITH MAINTENANCE (BRUSSELS), FOUND A 50-AMP CIRCUIT BREAKER IN LOWER 48 LABELED BATTERY CHARGER. WHEN CIRCUIT BREAKER WAS RESET, BATTERY POWER RESTORED, HOWEVER, AFTER 2 MINUTES, COCKPIT FILLED WITH ELECTRICAL SMOKE. EVACUATION OF CREW WAS ACCOMPLISHED. DE-POWERED AIRCRAFT. GENERATED FROM PILOT REPORT. REMOVED AND REPLACED MAIN BATTERY IAW MM 24 CHECKS GOOD. REMOVED AND REPLACED BATTERY CHARGER IAW MM 24. OPS CHECK GOOD IAW MM24. (X)