I have some property stakes to find and figured I would get the Sovereign out due to its depth capability and all metal mode. I charged the battery pack a few days ago. I had problems trying to close the batter door and figured the pack may have swollen. I left the door partially open and cranked the machine up. It worked just fine! I feel the Sovereign is better than my Equinox 900 for this job. Anyone else have this problem?? Thanks! Ted