How long do they stay warm?
1760636
They are like an electric heating pad - they stay warm as long as you have them turned on.
702293
No, they go to one temperature. They get pretty hot after just a few minutes so if you just want them warm, I'd say leave them in for about one-two minutes. Hope that helps!
730004
It's not for a long time. I'd say 20-30 min at high heat and another 15 warm. I couple these with the chemical ones.Hunting this winter I sat outside all day at 10 deg F. The chemical packets in my gloves and boots kept me most of the day exept the times where I had to use my hands more. Then I'd pop one of these out of my pocket and instantly get a rush of truly hot hands. Saved my fingers when I had to drag and dress my deer at sunset when it was below zero and no gloves on for about an hour.Edit: If kept in a pocket it's longer obviously. I had been using these out in the open. It's not for a long time. I'd say 20-30 min at high heat and another 15 warm. I couple these with the chemical ones.Hunting this winter I sat outside all day at 10 deg F. The chemical packets in my gloves and boots kept me most of the day exept the times where I had to use my hands more. Then I'd pop one of these out of my pocket and instantly get a rush of truly hot hands. Saved my fingers when I had to drag and dress my deer at sunset when it was below zero and no gloves on for about an hour.Edit: If kept in a pocket it's longer obviously. I had been using these out in the open.
1180002
The hand warmer/power banks are 3" x 4" by a little less than 1" thick. The temperature of your environment, and whether you choose the high or low setting, will affect how long the heat lasts. I keep one in each pocket of my coat and they last longer in my pocket, usually up to 4-5 hours on low, and up to 3-4 hours on high. I turn mine off when I don't need them to make them last longer as I am outside most of the day, then I charge them over night for the next day, I have been using these for a year now and love them, they are slim enough to fit in my pant pockets too. Hope that helps:)
1515074
Normally yes - they are only warm to the touch. But if you leave them on too long they can get hot to the touch. Good luck!
2243940
they take about an hour to re freeze, however they dont stay cold for very long.
1271
They only stay hot or rather just warm as long as the food is really hot. They cool down very quickly to room temperature once they are out of the microwave oven.
762929
That's going to depend on how you're using them. We used them to warm up baby bottles, ~4oz of very cold liquid, in a zippered insulated bag, took maybe 5-10 min to reach a warm, drinkable temp. If we left the warmer in the bag afterwards, it would still be noticeably warm upwards of an hour later (but not hot enough to completely warm up another bottle by then). Anything you can do to keep the heat contained will improve the longevity.
888249
It stays really warm for about 20 minutes, but I have found that if you lay down with it, it will retain some amount of heat for several hours, or longer, during the night.
1555201
I would say AT LEAST 8 hours, but probably substantially longer. I accidentally left them on the whole night and in the morning they were still going (this was also after weeks of use-where they were on several hours a night). I'm only saying 8 to be on the safe side, and to ensure that they remain bright enough, etc.
1414577
I could use them for about 40ish mins before they got too warm for my tastes.
2265647
25 - 30 minutes per warmer. I use the hand warmers while I am doing the school crossing guard on cold mornings. They are great but it would be nice if the heat would last longer. I put a hand warmer in wool mittens.
1323360
i typically only wear them for an hour at a time, they have a tendency to get a little warm. Great Quality though!
2243941
No more than a couple of hours, but your freezer may vary. I keep mine kind of cold, but I store these on the freezer door, so that has a tendency to affect things on my end.
47520
Mine last between four and five days depending on how long you have them on.
1778997
I have had it stay super hot for a minimum of 6 hours. It then stayed like warm for another 2-3. Remember to keep the top slid over to closed. Keeps it hot longer. I use these every single day and we have minus temperatures 6 months of the year. Love them and will order again when needed. Hope this reps!
2243943
A couple hours. They don't freeze solid, but they do stay cold for a while. I feel they work better than ice due to no melting. My wife and I use them all year to keep a small cooler, cold. They are great!