The smaller the battery the shorter the life. It all depends on what you are looking for. the automatic battery activates when you suck on it. the manual you have to push a button. Depending on where and how you want to vape, you may desire one or the other. If you work outside and are used to a cig in your mouth alot, the auto will be the only one to actually provide vape without pushing a button. If you always are able to have two hands to vape, then a manual will obviously work ok. Even if you get the blog (type) I'd recommend at least one manual and one auto (if you even want an auto). I have both blu, and volcano and they do work. However and I cannot stress this enough, the battery life on those "little" batteries is extremely short. (I'd say 30min to an hour TOPS...) I do have the charging pack and it works as they claim it does. I also have a joye 510 Manual batteries and I use it mostly at home unless I'm doing something around the house. I do forsee a bigger device one day soon however.
What the folks here are telling you is possibly avoiding buying stuff you might just have sit around later and buy the bigger stuff off the bat. Obviously there's some theory to that. I don't forsee me EVER getting rid of all my auto batteries and tiny stuff I do like just holding it in my mouth while working and such yet. (I may get over that one day).
Anyway welcome to the forums and GOOD LUCK to you. There's lots of good info here and I'm sure you'll learn plenty and spend lots...LOL.
Regards,
Deach