Looking for an E-cig that will last on a 9 month deployment. The two options that I am leaning towards are the Screwdriver and the EGO. I am not looking for something huge but some thing that will last in an environment that may not be the most forgiving like a house. I like the shape of the EGO and the size. Although, the EGO is not really battle tested and I am worried about the batteries. I do not want to spend a fortune on batteries if I do not have to. That is why I was looking at the Screwdriver. It is cheap and the batteries are even cheaper. As of right now the screwdriver is about as big as I will go maybe the little chuck but it is a little pricey. Anyways, I am pretty sure that the SD will be the better choice of the two but if there is another out there please enlighten me.