How long do these stay warm?
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.
762930
I use these inside my mittens when I walk my dog. They stayed warm for about 45 min. in sub-zero temperatures. Very easy to re-activate in boiling water. A good product for my purpose.
762931
Mine stay warm about 1 hour if I use them indoors and about 30-45 minutes if I use them outside in the cold.
2161299
No, Not long at all. I've never timed them, but certainly no longer than 2 minutes. The quick heat up is my favorite feature.
1761324
They last a solid thirty minutes for hot or cold. I bought this for use after ACL surgery and I'm glad I did.
849014
not sure ho long they stay cold but i use it for hot and it last about 3hrs great mug
1537112
5-6hrs. Depending on temp I guess. They do heat up when in use. Use units for a quick 10-20% charge if need.
445912
Normally I do not have them on longer than 20 min, But they are still pretty cold I would say at 30 min.
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!
1760636
They are like an electric heating pad - they stay warm as long as you have them turned on.
1080883
Yes, they definitely sweat. I would say they maybe stay frozen for 2-3 hours. When my daughter brings it home at the end of the day, it is barely cold.
1746849
I have 3 of the petstages cuddle pals. I used them for my kittens and they stay warm for 20+ minutes. The kittens just love the feeling of the warmth.
1039272
Alex, these aren't designed for any kind of cooking/heating of food. But they do keep cooked food hot for a few hours!
1616623
Depends on how long you are planning on keeping them. I've kept them unrefrigerated for a few weeks and they were fine.
148839
Yes, it is definitely warm. I have never had a problem. They do wear out after 9 mo to a year. They get kind of funky and my husband thinks they could be a fire hazard when old. I don't think so but replace to keep him happy. I swear by these to keep low stress w my feisty 3!
401461
I'm a bartender and wear these for an 8 to 9 hours shift. It gets very warm behind a bar with compressors running, these do not retain heat.
1396207
They will not keep hands comfortably warm if exposed to 10-20 degree weather for more than 15 minutes. I bought them for my wife to use during her commute to and from work. There are stand alone stick on pads called digits that you can apple to any gloves that will do the same thing.
270908
With NiMH at around 0* F they last about one hour before I start to notice a lowering of the heat output. That's while snow blowing on a tractor. Walking around, my toes stay comfortable for about 1.5 hrs. In both cases I am wearing well insulated boots that used to keep my toes warm when I was young. At 2 hrs I would have to change out the batteries but cold hands in wool gloves in Air Force mittens drive me inside long before that.
98097
Approx. 2 hours , these are ok to ware , but it is not warm enough for me , I'm riding the bike in 30-35 degrees ,