Purchased a set for myself as well as additional sets for my daughters . We all love them and use them regularly. The hand warmers provide great heat ! They’re a little tricky to figure out how to use (turn on and off) the different functions in the beginning but I just googled instructions and it’s a breeze now

Just pulled it out of the box. Build quality seems decent and they definitely get plenty warm. We will see how well they work in the field. I work outdoors but warm gloves are not really doable since I work with small screws. We will see how these hold up for a season.

The button too turn on the warmers are too small and confusing

I have one unit very first use a stuck button won't turn off last time was at night I had to drive so set with light on in my glove box . I like to product if working but has defects apparently may just return units

Bought 4 of these. (2 come in a box) the tops were coming apart couldnt charge them. Bought 2 sets a year ago and they worked great kept my hands warm and was able to charge phone etc with them. Quality has gone down on this product.

Love it. I have neuropathy so my hands are cold most of the time. These handwarmers are muscular; time + heat + power. Better than others costing twice as much. Fast charging for my phone, long term heat for my bones; put it in the bottom of my sleeping bag for all night warmth. I don't think it will trickle charge will solar or car battery. I'd like to know.

These are great handwarmers when you can get them to work. Having only 1 button to control multiple functions is rarely good. It's a NIGHTMARE when you can't turn something off. First of all, the button is NOT easy to access. It should not be this difficult. On occasion, the flashlight function triggers while trying to shut off the heat. It is then 10 - 15 minutes trying to come up with the combo to turn it off. I have not yet needed these to be power sources, but draining the power attempting to cancel the flashlight can't be productive. 3 stars for handwarming, unknown for power source, ZERO for flashlight.

Unbelievable hand warmers had to hand to people working at NFL football games and it saved their hands. Tried to fine more and can't. Would of had quite a few sales would buy again! Thanks

Battery dies very quickly doesn't even last 1 shift and then didn't even fully charge over night on its own charger it came with. Poor product. False advertising

great item. used it on an all day sit in the deer stand - to watch college football all day keeping phone charged and used as a light in and out — expect to use the hand warmer feature in another couple of months. 3-1 feature is awesome