infray Hand Warmers, Rechargeable 5200mAh Power Bank Electric Hand Heater USB Portable Hand Warmer Double-Sided Heating Pocket Warmer, Safe Heat Therapy Pain Relief Winter Gift for Women Men

The Main point:Does this thing work and if it does, how well? It does work and it does a great job! I usually use these when I go for extended walks. Depending on the setting, this can get quite warm and maybe to the point where it may be too hot for the bare hand to hold for extended period of time. The battery last between 40mins and up to 2-3 hours depending on usage and setting.How warm does it get?Low power ( 1 dot) - 107º - 110ºMed power (2 dots) - 116º - 122ºMax power (3 dots) - 124º - 129 ºThe temp isn't consistent completely, it does fluctuate a bit from my testing it looks to be around that range.Battery life:I go for several long walks, multiple times a day throughout the week, between 5-15 walks a week. Each walk last around 30 minutes. These results are APPROXIMATE, they are not on continuously:Low setting: ~4-6 hours (Can go about a week without charging)Med setting: ~2-3 hours (At t his setting, charge about twice a week)High setting: ~1-2 hours (Does not last long and it can get too hot)Ease of use:Very easy. One button operation. Hold the button until it turns red to turn it on. Hold the button until it turns off. Hit the button twice to see the battery level (blue = power level)Recommended? I would recommend this, it's small, easy to travel or go on walks with. Fairly quick to charge and easy to use.

Right now is hunting season. My parents needed something to keep them warm during the night, so I gave this to them for when they went hunting and they loved it! They did wish it was bigger, but their hands tend to get cold first and faster. The hottest temperature isn't actually that hot. It felt exactly the same as the lowest temperature. That was quite disappointing to them. And not both sides seem to work the same. One is hotter and the other isn't even noticeable. After a few uses and charges, the battery life doesn't last that long anymore. I hope that there really is a warranty on this hand warmer as it does seem to die faster too now. I don't know if it's just mine that does that or everyone else is the same. I will wait longer to see how long it will last before I have to contact the seller. The little bag that comes with this hand warmer is a nice addition, but it is a little too small, so it took time to put it into the bag. The silicone part of the hand warmer also gets stuck here and there when putting it into the bag. The charging cable could have been longer. There are longer cables online, but then it can damage the hand warmer since it isn't the provided cable. The battery life light indicator does not work correctly. Even after charging it, the light is still in the middle. Not a problem, but it would have been nice if it worked correctly. This hand warmer drains pretty fast now, so I won't be using it as a portable battery anymore. I used it once and it seemed to do well charging my phone slowly, but other than that, a hand warmer is much better. The weight of this hand warmer is heavy, but I'm able to lift and carry it around. Inside the box are a charging cable, manual, bag, hand warmer, and that should be it unless I am missing something else that I don't know about. =P Thank you.

Your browser does not support HTML5 video.  So I really am in love with this. So much, that I'm going to buy at least 2 more hand warmers! Maybe even another. That way each kid has one this winter.I tried it right away, easy to turn on. Held for about 3 seconds and it was on. It instantly warmed up. I thought it would take some time but it didn't it was warm almost instantly. Then I switched between the heat modes. Lowest level is plenty warm and highest level was plenty hot. For those really cold days.The picture up top gives the impression it all heats up, but I found it's mainly the blue area. But it's plenty!Says it holds a long charge, I will keep trying over the winter and if this holds to not be true I'll let you know. But so far it holds up well.Comes with a 12 month warranty.

This hand warmer warms quickly upon turning it on and it is comfortable to hold. I noticed that the heat regulation is better on the med and high settings and has the most variance on low.As for battery life, I let it run for at the lowest setting for about an hour. The battery level indicator showed only 1 light, but when I turned the heat up to medium and high, the indicator showed 2 lights out of a total of three that indicates a full charge. I don't think that this unit will match the lighter fuel type hand warmers for time, but one is not carrying an object with a flame source making for the safer and fumeless operation.I measured surface temps of the hand warmer using a digital IR thermometer. On low, I recorded 90 - 115 F; on med, I recorded 111 - 121 F and on high, I measured 122 - 129 F.The charge/charging port is a USB-C style connector. Included in the box is a USB cable, hand warmer, cloth bag and, a USB adapter.It has now been 1:15 and for the last 10 minutes the hand warmer has been on high and the battery level indicator still shows 2 lights. I can't wait to use it on our ice castle project, and as the electrician, I work without gloves much of the time in sub-zero temps. This will be my savior and I think I will need to buy another.