I usually walk to work every day, and this year when winter started to rear its ugly head I decided to do something about it and buy a USB rechargeable hand warmer. It works great except for the fact that I would leave it in my jacket pocket and forget to charge it until it was totally dead, so I solved this problem the best way I know how: more electronics!

The finished product. Now my USB hand warmers will always be topped off and ready to go.