We’ve seen USB powered AA battery, but apparently the following design concept applied a new feature to the USB battery, that’s as a USB flash drive.
The multi functional USB powered AA battery is designed by designer Wonchul Hwang. Just like a common AA battery, AA USB can power you various gadgets like digital camera, portable speaker, and more. Once it runs out of juice, you can twist the bottom cap of USB AA to make the hidden USB connector out of the battery for a charge. And the built-in 4GB USB flash drive allows you to take your important data along with you anytime.
Unfortunately, AA USB is just a design concept. If you need a real USB powered battery, you might like to check USBCELL AA USB rechargeable battery.