Rechargeable Hand Warmers 2 Pack, 2 * 6000mAh Electric Hand Warmers,Reusable Portable USB Hand Warmer, Outdoor Handwarmer, Gifts for Christmas,Hunting, Camping Accessories

These hand warmers are truly awesome! We live in the desert in Las Vegas and it gets extremely cold during the winter, especially at night. When we’re hanging out with our friends, window shopping or going to dinner, these hand warmers are a life saver for me and my wife in keeping our hands nice and toasty. All I had to do was plug in the warmers to charge them up (they were about 87% charged when I opened the box). Then just pop them into your jacket pockets so you can grab onto them while walking around outside. Press the button and, presto - your hands are being warmed and you’re enjoying life outside even though it near freezing. There are three settings for how warm you want the warmers to be. I used the middle setting and the batteries lasted a few hours before dying off. The size of the warmers is perfect to wrap your hands around and they function well. For the cost, this is a really inexpensive way to stay warm while enjoying the outdoors. Great product.

I have many rechargeable times. I have never had an item that is lasting longer at the start than the projected time on the listing. So far I am getting 14 hours plus or minus one of the two is getting an additional 35 minutes or so. These some with an incredibly short usb a to usb c type charging cables. Someday something like this would come with something to charge two at once with one cable, but I digress. There are charging ports in both sizes which is nice for flexibility of choice. As a direction reader it was more understandable to just play with these rather than reading the directions first. They really do heat that fast so I would be careful with children, diabetics other people with medical sensitive to temperature issues or being placed on easily flammable things. Considering what is currently on the market these are nice. I would love otehr options like switchable chargeable batteries so I could take these camping not just day trip events, but these are some of the best I can find and one of the longest promised battery life I could find. The storage bags are silly so I did not mind they were coming apart because in season I will pretty much always have these charging in case I need them and after I will bag them together with direction and charging cable for storage until next year. I find these useful, as well as effective as better than promised.

These hand warmers do what they say they'll do. I've mainly used them at 120 degrees, and they'll last a few hours even at 140.They come with very short USB C cables to recharge, so you may need a USB extension cord.

This is my second set of handwarmers. They are a flat configuration (as opposed to the cylindrical style) that is about the size of a medium sized computer mouse. There are 3 heat settings - 100, 120 and 140 deg F. For me the 100 and 120 settings are just right. The 140 setting is way too hot for me unless using it on top of something like a thin pair of gloves. They heat very quickly and stay warm for a long time.When you power it on, each push of the button cycles it to a different power setting (very intuitive). Then it displays the temperature as it is heating up. Mine heated from a displayed start temperature of 60F (which may be a default as my house is much warmer) to 120F in 1 min 30 seconds and from 120 to 140 in about 30 seconds. In reality, I think it reports achieving the set temperature a bit early, as in both cases, they continued to get warmer. These are perfect for a set of mittens, or just keeping your hands warm sitting in a cold office or while watching TV.The bonus is that they can be used to charge your cell phone. Very convenient to have in your car. They come in little individual storage bags with a short charging cord in each. Highly recommended.

Not stated in the product description. handling something that is more than 120° is not a good idea, so be careful and wear gloves or wrap the unit in cloth at its highest temperature setting.I got these Aspiremit Rechargeable Hand Warmers to warm my hands while out biking.summary:pros: gets warm quickly enough. low and medium settings accurate to 3°. works OK as a power bank for about 880mah. no button press to activate power bank, just insert USB cable.cons: high settings may be off by a lot, did not test fully as it gets too hot to handle. does not charge batteries to 100% as displayed, more like 90% after 8 hours on charger, and charging stops. not 6000mah, more like 2800mah. pops open at the seam if dropped from a few inches. needs better quality USB cables than provided. I did not test full heat run time, but suspect it would be about 4.5 hours not 10.charging the units took several hours to get to 100% and was left on the charger over night. opening the units and measuring the batteries shows a 90% state of charge or 4.05 volts, regardless of what the display reads.Temperature readings were taken with a FLIR infrared camera (uncalibrated).The unit does start heating quickly but takes a minute or more to reach 126°I set the device to 140° and it got up to 126° but was too hot to handle and I did not want to damage it, 140° is about the maximum you would want to heat up the 18650 batteries that are inside. I set it to 120°, and it regulated the temperature pretty accurately +/- 1 degree. At 100° it regulated the temperature at 100° to 103°.with a load attached to the output USB connector the device immediately delivers power no button press required.At 500ma as a power bank it puts out 4.55v, at 920ma draw it outputs 4.17v, at 1 amp draw (it's maximum rated output) it outputs 4.02v. with a draw of 750ma it outputs 4.3v so I would rate this as having a max output of 750ma, anything more than that and it really won't be able to charge something. The unit terminated power output at 780mah with a 900ma load. Continuing with 500ma yielded a maximum rating of 880mah. I suspect the boost converter uses more energy to increase 3.7v to over 4.2v.The provided USB cables are anemic, just barely adequate to charge the units, and get rather warm if you try to draw 1 amp from them. they are really only good for charging the devices.The description has conflicting information about how long the units last. one part says 10 hours another says 20 hours. I will assume that 20 hours is for both units. I was not going to test how long they stay warm but will also assume that 10 hours is for the lowest setting of 100°.opening the units I noted 2 "3000mah" 18650 batteries (in parallel) that together weighed 84g. a single (legit) 3000mah 18650 battery (that I own) weighs 45g so 2 would equal 90.The units are not charging fully, only charging to 4.05 volts or 90% charge even after leaving it on the charger for 8 hours past when it said they were 100% charged. I took the batteries out of the unit, separated them, and charged them to 100% (4.2v) then discharged them on a battery capacity tester to 3v. the results were 1607mah, and 1573mah, for a total of 3180mah, since the units only seem to charge to 90% then the max MAH I would expect from one hand warmer 2860mah.Everything else about its stated construction, is correct, there is aluminum on each side of the units where the heating elements are attached. They work as hand warmers for a reasonable amount of time. The can partially charge a cell phone in an emergency.