he he he..
okay two points.. e cig atomizers run off 3.5 to 4 volts.. this is whats needed to directly power one.. not five volts....
now this thing here is a simple cheap external power pack that will directly power an e cig..
DealExtreme: $3.80 AA-Battery USB Emergency Backup Power and Charger Pack
with three 1.2 volt AA (metal hydride) cells in and a blank it will be 3.6 volts.. with four it will be 4.8 volts.. take your pick..
five volts is needed to recharge a single 3.7 to 4 volt lithium cell.. or to overcome the built in resistor USB e cig thingies have..
u need to find some way to get rid of the built in resister or battery in your pass thru thingy.. three metal hydride cells in the thing i linked to will then directly power your e cig.. leave in the resistor and four cells will do the job.. or charge the little battery in your pass thru thngy if it has one..
super cheap and it will work.. honest
trog