Battery Heated Ear Muffs: Prototype 1

As you know, I like to leverage technology to stay cozy both in the Summer and in Winter. I’ve already got heated pants, jacket and gloves. But what about earmuffs?

The only heated earmuffs I could find were ugly traditional ones with a long cable that goes down to a battery pack you carry in your pocket. What the hell is that shit? I knew I could do better, integrating a single cell 18650 based…