Hand Warmers/Power Bank 7800mAh, Rechargeable Hand Warmer, 7800mah Portable USB Hand Warmer/Power Bank 7800, Portable Battery Charger with LED Flashlight for Cold Winter

I bought this for our brutal winter of 17/18 here in Wisconsin - I also used it Dec 28-31 while deer hunting in temps of -12f to +10f. I kept it inside a waist tube hand pouch and moved both my hands inside anytime they started to get chilly. The unit worked better than my expectations. I hunted over 4 hours on stand. The unit had no problems running for my full use plus some! Med is very comfortable and high really puts out the heat! They do take a while to fully charge, but they have a monster battery soooooooooooo it's all good.I'm going to order another one and keep one as a back up or use one in each pocket.

As a hand warmer, it's a little bigger than I'd like, but it fits in my pocket and gave me 5 hours of heat on the high setting. The flashlight button is a little tricky, but the light is bright enough to be useful. It charges quickly. It uses the same charging cable as my Samsung Smartphone. I like it so much, I bought a second one for my husband.

I’m not sure if they actually check their product when they send it out, but mine came looking like it has been used. It was dirty on both sides and seemed like it was scratched/dinged. I was really disappointed when I saw this, but the other functions seems to work fine so far...so I gave this two stars.

I use these for hunting. I have 4 of them. 2 of these and 2 of the same thing just a smaller battery size. Both pairs work great. I will put one in my hand warmer and one in the inside chest pocket of my hunting clothes and they help me stay warm all day long. Also double as a backup battery charger for my phone if it gets low.Edit: one stopped heating up outbid nowear int the middle of a hunt. Not good.

While I do like the fact that it gets warm, it doesn’t last long enough to be useful. I’ve tried using this on three separate occasions charging it fully overnight. Each time, on low I only get three hours before it dies. That’s a far cry away from 7-8 hours in the product description.

This thing produces an amazing level of heat. To be upfront, I have not run it completely down but it does seem to discharge as indicated by the built in lights rather quickly. This may indicate that the 7800 mAh rating is a bit generous. But the light is bright and it will keep your hands and more warm for as long as the battery lasts.

These really work! I have Reynaud's phenomena and always have very cold hands. I can stick these in my pockets and voila, my hands are nice and toasty warm. They are also great for charging cell phones. A friend was running out of battery and I let her use this. It completely charged her phone in a short amount of time.

Bought 2 of these at different times: One for my wife and one for a "Dirty Santa" gift. Everyone likes it. Versatile (hand warmer, flashlight, charger). And everything works fine. Gets plenty warm.