I'm trying to see if a usb wall charger will charge a 9 volt battery and be able to charge a phone while its not plugged in to the wall. What I mean is when its plugged in it charges the 9v. When it isn't plugged in it charges the phone.I have a european usb charger I took apart and going to make it usable with us sockets. The circuit board number is 908-55 and it is from courier charger model #TJ-8908<ic>. Please help me