i just ordered a passthru from them and i was just wondering , i have an kinda like a charger for my cell phone where it has a cell phone battery in it and you plug it in to charge the battery and when your done just take it with you to charge your phone if your out and about, well to get to the point it has a usb output to charge the phone can i use that and kinda have an powersource for my passthru while on the go. It is from a KYOCERA ECHO on the back it says input 5.0v 800ma output 5.0v 700ma