The Best Portable Rechargeable Battery Gadget

I’ve been messing around with AA rechargeable batteries for a while now, and I just discovered what might be the ultimate related gadget: a USB power pack that can charge both ways. This is a multifunction device that has the form factor, and same primary function as those iPod/Cellphone emergency chargers, except these can also Read more about The Best Portable Rechargeable Battery Gadget[…]