I got a hand warmer USB Power Bank as a gift from a bartender in South Korea. This is actually pretty useful for warming your hands in cold weather and also doubles as a 5200mAh USB power bank!
This hand warmer USB power bank is small enough to fit in your hands and pocket and provides 2 to 6 hours of warmth during winter months and worked out great during my latest snowboarding trip in South Korea where the weather ranged around -8 degrees celcius. I was actually buying a bunch of regular hand warmers and this USB power bank certainly works just as well. While it does not last as long as regular hand warmers I like the fact that you can re-use it as many times as you want after re-charging and also you can re-charge your smartphone during hotter seasons as a USB power bank.
For those of you who need some hand warming in the morning and afternoon while commuting to work, this may work out to be perfect since it will give you instant hand warming whenever you need. Best of all, unlike traditional hand warmers, you can easily turn off the hand warmer so you only use it when you need to. If you need something like this, I highly recommend to try it.
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