Eneloop Kairo hands-on

Some products are so simple but so logical that they make you wonder why you didn't come up with the idea and file the patent. The Eneloop Kario from Sanyo is one such product. This little palm-sized rechargeable hand warmer does nothing more than take energy stored in its lithium ion battery and convert it into heat. Perfect for those chilly winter days and nights, though a little pricey for our tastes.