Hi there so I am looking at GLV and it seems like a very nice portable mod. However I wanted to know some opinions about the battery life between those two. I know that SP is using CR123A 3V so how come is advertised as 3.7v device? Now GLV mini is on 16340 and is about half an inch longer. Now thats not a huge difference but the more portable the better for me. Also what is the real Mah on those batteries as I know some vendors advertise their as 1000mah but they are really not. Thank you! 