Similarly, lighter fluid-based hand warmers like this Zippo model will only stop emitting ... and they provide electric heat for up to 6 hours. They have three heat settings to keep you dialed ...

Read more: 6 Heated Gadgets That ... On Amazon, a two-pack of black Unihand AI Hand Warmers retails for $29.99, but they are ...

After putting 11 warmers through their paces, taking long, chilly walks and spending longer, snowy days in the mountains, we concluded that the Zippo HeatBank 9s Plus Rechargeable Hand Warmer is ...