My husband plays golf here in the NW and he also works outside. They charge quickly and a dule charging cord is very convenient they get hot and are a good size not small. They work well and the charge holds. The design is comfortable.

I was going to purchase several hand warmers as Christmas gifts, including one for myself. I reviewed many products on Amazon. Reviewing product specs, like size and shape and MAH ratings and power plug type and power bank function and of course many reviews, I decided on this product. After receiving the product, I immediately charged and tested them. The units come with 2 USB-c to USB-A adapters for versatility. The USB-C port is used for both charging input and power bank output. Each unit is rated at 6000mah each. Thats 6 amp hours each. I tested unit 1 on the red (high heat) setting. It lasted for a solid 4 hours. I found the red setting to be great for warming initially cold hands up to a comfortable warm temperature. Red did become too hot after hands were warmed up. I did not test the yellow (medium heat) setting. I ran unit 2 on the green (low heat) setting. The unit heated very well for a period of 7 hours solid before going dead. I found the green setting to be great for keeping hands warm after they are initially warmed (by red) and comfortable. After letting unit 1 sit for a couple hours I tried to turn it back on and no power up at all. I charged unit 1 using USB-C (at 3.6 amps available). I found a full charge took 2.75 hours which I thought was a little slow, but liveable. Thus, the effective charge rate is 6 amps / 2.75 hours= 2.18 amps. I would guess that each unit uses 2- 18650 3000ma Lion cells in parallel. My conclusion is as follows: I like the look and feel of this unit. It is just the right size and curved shape to fit nicely in the hand. The case surface is matt black and has a soft, almost rubber, feel to it. It hides fingerprints well too. It heats on both sides. The power button in recessed and on top. Turning the unit on/off requires a hold of the power button for 3 seconds. So no accidental on/off. The heat setting button is easy to operate- even blindly in my pocket. If the unit is used in a pocket on high to warm hands from cold to comfortable for an hour, then switched to low to keep the hands warm, I would estimate a combined run time of about 5.5 hours. Thus, I feel the heat duration is very acceptable. If a person used a sweatshirt 2in1 pocket, one unit could be used at a time thus providing 11 to 12.5 hours of use. And one unit could be charging while the other is in use. I also found that the unit worked well to preheat my houseshoes for about 10 minutes. I think the unit would work nicely to preheat snow boots or ski boots or gloves. I do recommend this product with 5 stars.

I bought these on a whim! Deal of the day type of thing and thought why not. The 'low' setting is one sided and the 'high' setting is both sides. The high on number 4 is definitely plenty of heat! One charge lasts a while and they are easy to hold, or stick in your pocket. The flashlight is pretty handy as well. Hunters, farmers, or anybody else that enjoys being outside year round and experience cold weather, these are a great buy!

Kept my hands really warm when my wool gloves couldn't at 25 degrees outside. A bit big but I could put my fingers around it but gloves were tight.

These hand warmers are great! It is always really cold where I work and my hands are always cold. These hand warmers work really well. I love that there are multiple levels for both high and low settings. I also love that they are rechargeable!

Simple to use! Power button: 1 quick push shows the remaining battery life 2 quick push and the LED light turns on 1 long hold turns on (Low level one side) Power selection button: quick push will cycle through low (L1), medium(L2), high(3), and Face-o-the-sun(L4) Long push will change it from one side (L) to both sides (H) and you can cycle through the levels You may have been able to tell from my instructions above, but the L4 or H4 becomes very hot... maybe too hot. It was great for a quick warming. My normal use was L2 and was plenty warm enough. Battery life is directly reflective of the heat level. The hotter you have them, the quicker the battery goes down. I used mine for 3 hours and had 60% left. If you needed these for a very extend use, may need a recharge break in the middle. That being said, I plugged mine in during a lunch break and came back to 100% The only CON I have is that they are a bit bulky. This didn't effect me in anyway, just an observation.

Wife brought these to a trip to Canada in the winter and it worked great. They kept her hands warm all day just as good as the disposable packets would. The flashlight and the ability to charge a cellphone was an added bonus. Definitely recommended.

The rechargeable hand warmers are a game-changer for staying cozy in cold weather. With quick charging capabilities, they’re ready to go in no time, making them incredibly convenient for on-the-go use. The fast heating feature ensures that your hands are warmed up almost instantly, and on the highest setting, they get extremely warm—almost uncomfortably hot, which is perfect for those truly frigid days. Lightweight, compact, and easy to use, these hand warmers are a must-have for anyone who spends time outdoors in the winter. The rechargeable battery also makes them an eco-friendly alternative to disposable hand warmers.