KarecelHand Warmers Rechargeable, Electric Hand Warmer Reusable 5200mAh Portable USB Heater Battery Hot Pocket Warmer Heat Handwarmers, Cool Winter Gift for Men and Women Outdoor Camping Skiing

There are three settings & It heats up very fast! I originally bought it so I can put it in my dogs snuggle puppy plushie (I didn’t wanna keep spending money on disposable heat packs). It helped but it definitely didn’t last as long as I hoped (which honestly isn’t actually a bad thing in general since it’s for hands anyways and wasn’t meant to stayed on for like 8+ hrs at a time) and I had to keep charging it. I do plan to buy 2 more for the winter however

This is my 2nd purchase. After 3 years the first one doesn't get as hot anymore. But I use them often. Great on chilly mornings to get the fingers going on the keyboard. Nice to keep in your jacket pocket when walking outside in colder temps too.

Overall I love this warmer...I bought this to help me keep my hands warm while playing darts (I play in a league). But I'm always cold anyway so it's great to have around, and also works as an emergency charger for my phone. I love that there's a little sack to keep it. The only negative: I had been keeping it in my purse, and randomly I'd see a red light on coming from its bag because it had turned on without me knowing. This happened a lot. The button is easily pressed it, which means it's on and the charge is wasting away. The manufacturer may want to think about using a switch instead of a button to turn it on.

Bought this for work cause it be so cold! When I tell you, it works it almost gets to hot! But I'm not mad at this little thing packs a powerful punch!

These hand-warmers are so nice, they have three settings but I never get to the third because they get so hot! They’re easy to recharge and fit nicely in your pocket. I highly recommend getting a pair!

This is the second Karecel hand warmer I've purchased, the first has been used for two years and still going despite my dropping it a few times and having to put it back together, the new one is a back-up. I have Reynard's syndrome and living it PA means several of my fingers lose circulation frequently. The Karcel provides a substantial amount of heat that allows my fingers to return to normal within a few minutes when held inside my pocket.

This is great for me in the colder months because I have Raynard’s Syndrome. It heats up fast but I have 2 complaints. 1)it takes at least 3 hours to fully charge if almost dead and 2)I keep it in my gym bag, backpack or purse and I’ll go to use it and even after I’ve charged it, the battery is either half gone or dead because the button is so sensitive that if it hits anything in your bag, it automatically cuts on. So I wouldn’t buy this product again

This is a great hand warmer. I like the size as it fits in my hand. Our office was so cold during the summer that my hands were freezing. This helped to warm up my cold hands and get back to work.