Heated Vest! Great idea...?

[Litzsru11]

I was thinking that one of the thermologic heated vests would be an awsome asset to my hunting apparel. Light weight, not bulky, and warm. The battery is said to last about 6 hours and you can buy spares.
Sounds like a great idea! ANYONE USE SOMETHING LIKE THIS BEFORE? thanks for the imput and happy hunting!

[kwilson16]

I might have to try it. It says it comes with two batteries. Do you need both to run it? Or, do you get 6 hours from each battery?