Just an FYI for those who own or will own one, when you plug the usb end of the charger into abattery or a usb wall charger, a red X appears over the bbattery icon, and it says discharging. Reading reviews, others thought what I did, and assume it is not charging, makes sense with a red X, eh? NOT! It IS charging! Not as fast, granted, but it is charging. I was so happy last night to find out my 10000mAh battery wasnt a wasted buy! If you turn off the tablet while charging in this manner, it doesnt discharge, and the percentage actually goes up. Just wanted to clarify this, as it is misleading and many people thought the red X meant you couldnt charge via usb. Sure, it is much faster using the AC outlet, but it does work using usb... dont be disappointed like I was, but I am happy now, to find the hidden truth!