@tx and jp1000 - thank you for answering.Since I've never used an auto battery, I'm sure I don't know what I'm missing. And I don't always pay close attention when topping off so a manual may be my best bet still since there is not a huge difference in flavor. Thanks guys!
You just need to take the carto off the battery while refilling. These cartos don't leak at all after they are filled and will last 12 hours of vaping so you don't have to top off all the time like other cartos or attys.