OCOOPA Hand Warmers Rechargeable, 7800mAh Long-Lasting Heating Electronic Hand Warmer, Battery Powered Great for Camping, Hunting, Warm Gift, Power Plus, 1-Pack

Hand Warmers warms fast. Compact.

Great invention!

The USB portion of these hand warmers makes it possible to charge your phone from the hand warmer in a pinch (although I've found myself using charging my phone more often than warming my hands - c'est la vie!). I purchased 8 of the smaller versions of this handwarmer, and while there are pros to being smaller (easier to put in a pocket, etc.), the most significant con to the smaller version is that the USB port is a separate, small (like 1/2 inch square) adapter and very easy to lose. This larger hand warmer has the USB port built into it, so there's no need to keep track of a small adapter.While this hand warmer is a bit larger, it's still very easy to manage and hold in one hand, put in a coat pocket, etc.All in all, I love these rechargeable hand warmers. The ability to adjust the amount of heat is great and they last for at least a couple of hours depending on if you have the heat turned up high, using the battery charger, etc.Very happy with my purchase!

I like that it’s smooth to the touch, but I noticed the centers were starting to dent in. The battery life seems to be short, and it takes hours to charge it up. You can’t use it while it’s charging, and there’s no option to attach a string to hold onto it better without dropping it. I gave it 1 star because I’ve only used it a few times and one side completely stopped heating up so when I tried to use it yesterday, one side was so cold to even want to hold it. I also paid more for it, which is weird because I bought it last month. It’s now available for $7 less.. would love my money back

This hand warmer is much better than any other I have tried. It is a must for anybody suffering from "cold hands" or Raynauds.The warmer has a very comfortable feeling and gets quite warm/hot. However, it does not last the 8-12 hours stated in the description. I usually get about 5 hours when charged fully. I wish it would last longer.Another major improvement would be if there was a way to attach a wrist strap like many other warmers have. When I need to use my hands for anything, I have to put this in my pockets, and it is quite heavy. A strap would prevent this.I would use the carrying pouch in place of a strap. However, the pouch that comes with this is useless. First of all, it is a bright blue color and does not match the black warmer I purchased. The color stands out too much for me to use in my office. In addition, the strap on the bag pulled out before I even was able to use it. It was not tied on properly.The warmer is great. The lacking strap and short battery life is annoying. If it would have a strap at least, I would give it five stars.

I put this one into my car. It can warm my hands before I start my car in winter, and also can be used as back up power bank. The size is not big, maybe someone think it is too small. The temperature has 3 levels, the lowest one is good enough to me. I tested the capacity which is enough to charge one iPhone XS Max .

These hand warmers grabbed my attention while scrolling through Amazon because they seemed like such a nifty little gadget! I ended up buying two, one for each hand, and I was so excited to try them that I immediately opened the package when it was delivered. Unfortunately, they are not quite what I imagined and are just okay for me. First off, they do not look big but when I hold them in my hand, they feel huge - factor in how firm they are and it made for an awkward hold for me. Secondly, they don't really "give off" heat like I thought they would. I thought they'd be more like when you have a hot beverage and you can feel the ambient heat coming off it. My plan was to just put them in my pockets so they'd make a nice, toasty zone for my hands, but you have to grip them to really feel the warmth. I don't like that because gripping makes my hands hurt especially when it's cold. Also, it's not evenly hot, more like predominantly in the center lengthwise (and more on one side for mine) so I have to hold it in a certain way to get the most heat. Also, a definite negative for me is that the battery used is the type where its recommended to fully use it before charging again. I don't like that because I mainly use the hottest setting so it doesn't last very long. If I use half of its power, I can't just top it off to have a full battery for the next time. I mean, I can, but then the battery will have a much shorter life supposedly.Despite these areas where I think the product can be much improved, I decided to keep mine because they are still better than nothing and I still like the concept of a rechargeable, reusable hand heater. I do hope that in the future, the technology will be there to make these better.