How much money are you looking to spend. There are a million mods that'll give you long battery life. I'd stay away from the disposable ones. The eGos and the Twist and kGo. The Twist will last all day, but it's disposable and what are you going to use when it's charging? You don't want to charge it overnight while you sleep. Waking up to a burning house is no fun.
Hey Sailorman. Sorry to jump in here but this grabbed my attention. I have a few of these coming to me this week. So, charging overnight is a no-no?