I call it the DETONATOR

[bstedh]

Sounds like you need a simple flashlight mod. Very rugged and if you use a good switch will last forever. =]
http://www.e-cigarette-forum.com/forum/modders-forum/192940-flashlight-mod-extras-keep-mind.html

There are even more better ways to build them somewhere in the forum. =]

 

[crk0756]

Sweet looking improvised mod....