Grumpy Old Geeks Products Zippo Rechargeable Hand Warmer Product Zippo Rechargeable Hand Warmer 2 mentions in 1 episode A battery-powered hand warmer Jason recommends and says can also charge a phone. Mentions 238: Same as It Ever Was Dec 11, 2017 39:24 I found the Zippo rechargeable hand warmer, the six-hour version 40:16 It'll also charge your phone.