For USB charging, does anyone know if the data pins need to be jumped or what? I have a eBay battery charger with USB output, and the USB output does not work for some reason. When I plug my phone in there, it gives the charging status but does not charge(also gets hot). Also, my iPod doesn't charge at all with the USB output. I've cracked it open and it looks like it's getting power supply(5v/gnd).