If I was buying all over again with a new device, I probably would have gotten the mini, with extensions, to have the option of the smaller battery... However, in reality, the 18490 stock battery size of the regular pretty much lasts me a full day and a little more. I know the 18650 would last longer, but I'm liking the smaller size. And I think that the smaller 18350 may be more of a pain than its worth if I have to switch during the day, so the regular mod is perfect for me. Just hate NOT having the options available, ya know?