It's 100 degrees outside my window at this very moment. The last thing I want to think about is a rechargeable neck warmer.
Alas, I must consider the implications of such a garment. If you live in colder climates or enjoy winter sports, something like this might be useful. Be careful though—with all of the news about batteries spontaneously catching fire, melted throats could be a concern. [Sanyo via Boing Boing Gadgets]