Rechargeable battery that can charge from any USB port

Photograph of two "USBcell" USB-char...Image via Wikipedia
We all use batteries, and rechargeable ones are more cost effective and "greener" too. Here's an ingenious idea that's been out for some time now which I believe should be available in more places.

These rechargeable batteries can be plugged into any USB port. It's good for the environment, easy to use, and overall a great idea!


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