My 5" Note will. The 7" Samsung Tablet I bought and immediately would not even charge from my vehicle's 12v outlet using a USB adapter rated at 3.1 amps. I smell something proprietary... OK... I can see that the average PC's powered USB port might not be up to feeding the bigger battery. But automotive 12v?? Seems like a confluence of engineering/design and marketing. So, bottom line, is this issue common to all devices above a certain size? Or might part of it be Samsung playing games? How about the Nexus 7?