If you’ve been looking for some versatile rechargeable hand warmers, consider these magnetic options from Ocoopa, which can also be used as portable batteries to charge your phone.

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Liz Zack Zippo has discontinued our top rechargeable pick, the Zippo ...

As winter takes hold and temperatures continue to fall, many are seeking cost-effective solutions to stay warm. Amazon shoppers have been singing the praises of HotHands hand warmers. These single ...

used in a hand warmer. Given the right amount of lime, the amount of heat generated would be suitable for our purposes. The reaction is also portable and easily reproducible. But first ...