But not so with the Go Warmer. This lozenge shaped device is not only a USB power bank that can keep your ... You can hold in in your hand, put it in your pocket, maybe even sit on it if you ...

Chemical hand warmers take longer ... meaning they require only one USB power slot. Recharging takes 2 hours (like the Zippo HeatBank). They’re not as easy to use as our top pick.

a hand warmer is basically a big rechargeable battery that puts out heat. But in practice it tries to do too many things. Although the warmer itself charges via USB-C, the port to power a phone is ...

The Lifesystems rechargeable hand warmer is a step up from your standard gel hand warmer. It charges via USB, offers different heat settings and doubles up as a power pack in a pinch. At RRP it'll ...