As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE AND BURNING ODOR ENTERED THE COCKPIT ON DESCENT INTO BRU. THE BATTERY CHARGER CIRCUIT BREAKER WAS PULLED AND THE SMOKE AND ODOR CEASED. THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE MAIN BATTERY HAD OVERHEATED AND BUBBLED OVER. THE MAIN BATTERY AND CHARGER WERE REMOVED AND REPLACED IAW MM 24-31-01. OPERATIONAL CHECKS WERE GOOD.