Originally Posted by mastershake916
Also could I rig up a way to charge it though USB? which is 5v and 500mA.
try a DC to DC converter that takes the 5 volts at 600+ mA and jumps it to 7.2-7.5 volts with corresponding drop in current. If you must use USB. Safer to get a basic charger that uses 120V AC from a wall outlet. And likely cheaper.