Rechargeable batteries are pretty eco-friendly in the sense that you can recharge them and use them, again and again and again, until they stop holding a charge. However, most battery chargers are bulky and are a pain to carry around, especially if you’re traveling or need to use it on the go.
A neat solution comes in the form of the rechargeable AA battery USB drive. Now, there’s already a product on the market called the USBCell that can be recharged via USB. However this concept design not only does it have the capacity to power up your gadgets that require AA batteries, but can also store video, audio, documents, and other files. All you have to do is plug it into your computer to recharge it or transfer files.
The AA battery USB drive was designed by Wonchul Hwang.
[via In Stash]