As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN BATTERY CONNECTOR WAS DISCONNECTED DURING MAINTENANCE EVENT, DISCOVERED THAT ONE OF THE BATTERY PINS HAD OVERHEATED AND WELDED ITSELF TO THE QUICK DISCCONNECT CONNECTOR. WHEN THE QUICK DISCCONNECT WAS DISCONNECTED, THE PIN FROM THE BATTERY TORE LOOSE FROM THE BATTERY AND CAME WITH THE CONNECTOR. THE PIN COULD NOT BE PRIED OUT OF THE CONNECTOR. WILL REQUIRE BOTH NEW CONNECTOR AND BATTERY.