I was planing on making something like this for my next small battery mod I make but unfortunaly it wont work with the mini-mag mod as the botton is in the back. Although I have to say since I've been using an 18650 mod I haven't felt the desire to use my current usb passthrough as the batt life is so good and it keeps me from beeing tied down. although I will be making one of these for my next AAA batt mod as I plan to have the botton on the side.