Well no matter what you do, eventually the liquid WILL make it's way into the battery. You'll notice when you take a draw that the light will start to flicker.
The only way the manufactures have figured out to stop this so far is the manual switch batteries. (The hole is covered) We are supposed to get a start kit from Parked over at Dietsmokes.com that contains a manual switch in the kit, we'll let you know how well it works once we get it.