OCOOPA Rechargeable Hand Warmers, 10000mAH Electric Handwarmer Winter Warm 15 Hours Portable Hands Heater for Men and Women, Outdoor Indoor Camping/Fishing/Cycling/Motorcycling/Skiing

This thing is amazing for the winter time in Minnesota. I use it every single day when walking my dog during the winter. It keeps my hands nice and toasty. It is also nice that it doubles as a portable battery for charging your phone or other small electronic device. I would highly recommend for anyone that does outdoor activities in the winter!

My husband has arthritis issues in his fingers. This little thing really helped him to reduce the pain. He holds it most of the time, it helped the circulation.

07:19:06.86 -- this was when my hand warmer cut off after running it non-stop on high at room temperature. I usually use a lower temperature outside, and my hand stays warm all day.I only tested once with a timer, but so far, after two other handwarmer purchases (one handwarmer didn't work at all, and the other was fine but lasted a fraction of the time that Ocoopa lasts), this is the only handwarmer product that works as described. It lasts; it's easy to hold; and it's a satisfactory replacement for the disposables.I am purchasing a second one so that I can have a pair and I'll be using these every day, but I'm giving only 4 stars because I have to buy another one. This product--regardless of colour choice--should be sold as a set at a lower price. If you aren't going to be outside for more than an hour at a time, I strongly recommend buying one of the cheaper models, e.g., https://www.amazon.com/dp/B0BCFMXVW8?ref=ppx_yo2ov_dt_b_product_details&th=1 which doesn't last as long as described (it only lasts just under three hours in room temperature) but gives you two hand warmers for the price of one. This product has to last at least two winters to be worth the price, and with daily use and charging, I'm skeptical that this will still work and truly be an eco-friendly alternative to the disposables. Only time will tell. If this does last two winters, I'll update my review and change it to 5-stars.

If your fingers turn white, red, and blueish, you have Reynauds. Someone told me that after I was having a lot of pain just shopping in Walmart. Carrying this in my pocket helps bring back the warmth and circulation to my frozen fingers and stops the associated pain.

Great to keep in my pocket to keep my hands warn esp when taking photos and have my gloves off

The heat is very strong, especially at its highest setting. Lasts nearly as long as advertised. I noticed the highest setting lasts for about 4-5 hours at the full battery, which personally I found to be impressive.

This is a well-made product, and on a medium setting, in a jacket pocket, keeps my hand warm through lightweight gloves. Easy to use, one-button, no complaints about that.I would give it five stars, save for the battery life. I don’t know where they tested this device, but twelve-hours on a medium-setting is pure fantasy. Four-hours continuous operation is the best I have gotten, and this after an overnight, full-charge.Only way I can see twelve-hours of unabated heat is to turn on the oven and stick it there.Apparently this is a common complaint with such hand-warmers, and it’s not a deal-breaker — I don’t really need that amount of time to walk my dog in the cold; still, if they had under-promised and over-delivered? That would have been better.

If you work in the elements and can’t wear gloves, this is great to have in the pocket of a hooded sweatshirt. Allows you to warm up your hands as needed. Plus charge it in the van between jobs.

Keeps hands warm when needed. Excellent product.

I have one of the classic 5200mAh hand warmers and its served reasonably well, but for golf on cold days wanted one with longer battery life (would last ~2h 15m on highest setting).The H01 1000mAh is a noticeably bigger and seems to be hotter on highest heat setting. Would be nice if the heat plates wrapped around the side a bit more, but none the less good for heating my fingertips which get really cold. Overall I would recommend. It also is generally well packaged and made, and reasonably good value for money.The but's:- I got about 3.5Hrs on highest heat setting in 8-10 deg C ambient temp, still not enough for full round of golf.They claim "up to 8 hours on high setting", but thats @ 25 deg C!! Who would need to warm their hands when its 25 deg C? Besides, it's common practice to test devices at 20 deg C. Should be even lower for a device like this. So expect half of their figures in real-life use.- Not thats its a problem in my use case, but takes 10+ hours for full charge even from a high power output USB charge point (doesn't make any difference because the input charge rate is regulated to quite low value).- The power/level button should be better protected. I already found several times when putting it in my pocket or golf mitts that the button is easily knocked and changes the power level.

This product works great on those really cold days on the seats Coasr

I have poor circulation and quickly lose feeling in my hands on a cold day. I have therefore used hand warmers for many years. Back 30 years this was a solid fuel (carbon) burning device, but for the last three or four years I have used a rechargeable electric warmer. This was an improvement on the solid fuel burner, but even when fully charged its warmth was intermittent, and the charge, even when fully charged overnight, ran out after two or three hours at best.The OCOOPA hand warmer is in a completely different class. It has a reassuring solidity and sits in the hand very comfortably (see image). I have used it twice now to play golf and once on a long walk. On each occasion, it maintained a constant temperature throughout. For both the golf rounds this was for over four hours continuously, and on the second occasion, because I wanted to test it, I had it turned up to the middle heat setting (of three), although I have found the lower setting perfectly adequate for most situations. Recharging after each of these occasions took remarkably little time, an hour at most, which suggests to me that the device had plenty of power remaining even after four or more hours use.It is very easy to use. The instructions are clear and easy to follow. The indicator lights are well designed and helpful. Unusually, it has ports for both a Micro and a USB C charger, and comes with the added bonus of a USB A port so that it can be used a a power ban for external devices.I have no hesitation or reservation in recommending this device.

I bought 4 different brands of handwarmer last year to warm my hummingbird feeder. This is the best among all, long lasting (7hours with max setting outside with -4,-5 )with sufficient heat. Now purchasing my second one.