KarecelRechargeable Hand Warmer, 5200mAh Double-Sided Instant Heating Electric Hand Warmer Power Bank, Up to 11Hrs, USB Portable Handwarmer Pocket Heater, Tech Gifts for Men Women, Winter Essentials

Gave these to my grade school granddaughters for Christmas. Nice for keeping their little hands warm when playing in the Iowa snow. Or at a football game!

Perfect for what I needed it for. I live in Florida was scheduled to play violin in an outdoor amphitheater during “the great cold snap of Christmas 2022.” It was between 25-35 degrees, and obviously when you are playing an instrument you cannot wear gloves (and fingers will start to move too slowly under about 40 degrees), so I had this hand warmer in my jacket pocket to warm up my hands. It lasted the full 4-5 hours for both concerts, but the battery died after about 5 hours, so it’s not to be used all day. However, it kept my hands the perfect temperature, even though I just stuck my hand in my pocket for a few seconds at a time. I also liked that there was an option to use it as a power bank if needed, because I was using my phone as a light. My pocket kept it insulated and it was nice and toasty in there, like a hand oasis. Typically as a Floridian I don’t usually feel prepared for “winter,” but this time I felt very prepared. Our event organizer passed out those disposable Hot Hands things, but I definitely fared better with this handy device. Even if it doesn’t get cold like that again for another 30 years, I still think it’s worth the money & will keep it “just in case” (and to use on those knotted up muscles)! I think if you need to use your finger dexterity without gloves for whatever reason—maybe in a freezer, or as a caterer, or as an artist or musician, or setting up for an event, or maybe the mittens don’t match the wedding attire—this is the thing to get.

I have several different warmers. They are a much appreciated item during winter. Compared to my other ones that are this shape, it is smoother and the button placement and design makes it easy to accidentally press, thus changing the heat setting. This one does come with an optional wrist strap that is nice if you have a habit of dropping things, especially if using through gloves. I bought this one to use in the car, to alternate hands with until things warm up.... if the driving is safe for that. I also use it when I am a passenger. Good also for home use to warm up cold hands and feet. For that use, this is the ONLY hand warmer that I can use at the lowest setting without it getting too hot. I don't need something to buffer the heat. Great also for applying heat to other areas of the body that can use it. For other warmers I recommend wearing thin gloves for hands or a cloth or thin blanket for body while using for optimal comfort and safety if using for a long period of time. Warmers can start out hot. The heat comes in waves. There is a learning curve. Be careful using hands warmers with children. Again, this one is very comfortable for me at the first level right on the skin. This us the only warmer I have that I can use like that. I use the second and third heat level when wearing gloves. What level I use depends on the thickness of the gloves and the degree of cold.

… also works great, better than a big heating pad, on muscles, joints, injuries, stiffness. Even things like jaw clenching, TMJ, sinus and ear pain. You can even rest your neck or wrist by it, and tuck it into weird places like the crook of your collarbone, or in a hood hanging between your shoulderblades. Just be careful to let air get to it, and put a layer of thin fabric between the heat and surfaces, or the heat and your skin anywhere except your palms, which can usually take more heat. You could even try using it as a boot warmer (just make sure to remove it) before going outside. Low setting isn’t as hot as HotHands, and we are thankful for that. High is about the same temp as HotHands. If you want heat on a larger area than your hands, try putting it in the middle and move it a bit from time to time. It does get very hot for indoors, low setting is almost too much for us at room temp without fabric between heat and skin. Temp goes up and down in gentle waves, but this is a good thing, keeps your skin from getting too hot from constant heat, keeps the wires safe, and it makes the battery last longer. It arrived with a battery partway full, and that lasted at least a couple hours, after a really fast, hot warmup, while we played and tested it. We think it will last at least the described length, maybe 8 hours at room temp. Warmup after several tries was still very fast and hot, just a couple minutes, not even five. Color is as pictured. Button and lights work as described, easy to figure out if you dont want to read the manual. Plastic strips around the sides make it easier to handle the smooth oval shape. Power cord works and ports are as described. You can use your device’s power cord instead of this one to charge off of this device if this device’s port isnt the right kind for yours.We feel a few things could be better. Power cord is very short, maybe 8 inches, and we like long cords. But some people like short ones, less to tangle. We also wonder if the on-off button, which sticks out a bit, could get bumped on inside a packed bag, tight mittens, or a tight pocket. We have bumped the temp too high by accident in our hands. And, the one we were sent DOES heat up and the button DOES work while charging, though the manual, read with a magnifier, says neither should. The lights turn pinkish purplish when it is heating and charging at the same time. Hopefully, this is safe for the wires. But overall, this is way better than HotHands or a heating pad, so far.