For the mod god's

[Mestra]

Would this work?

Get a USB pass through with an inline battery (1 3.7v battery) cut the USB cord between the Male end that plugs into the computer and the battery then wire up a male and female end accordingly. Conceal the Battery + wires in a case (may have to shorten the wires between the Bat and Where the atty plugs in) Then be able to use it on the go off the Bat and while plugged in as a PT? Also if wired in Parallel would this be enough to charge 2 Bats?

I have an Idea for a mod but this would need to work since i'm terrible at wiring and want a charger built in. Thanks for any input given

[cybervex]

The charging 2 batteries will not work. The pass-thru should be sampling the power from the battery to know when it should stop charging. With 2 batteries, charging would stop when one battery reached full charge.