Hand Warmers Rechargeable - 14000mAh Electric Hand Warmers Rechargeable 2 Pack Heat Up to 131℉ with 18Hrs Warmth, Reusable Electronic Portable Pocket Heater for Women Man Golf Raynauds Camping

I was going to purchase several hand warmers as Christmas gifts, including one for myself. I reviewed many products on Amazon. Reviewing product specs, like size and shape and MAH ratings and power plug type and power bank function and of course many reviews, I decided on this product. After receiving the product, I immediately charged and tested them.The units come with 2 USB-c to USB-A adapters for versatility. The USB-C port is used for both charging input and power bank output. Each unit is rated at 6000mah each. Thats 6 amp hours each. I tested unit 1 on the red (high heat) setting. It lasted for a solid 4 hours. I found the red setting to be great for warming initially cold hands up to a comfortable warm temperature. Red did become too hot after hands were warmed up. I did not test the yellow (medium heat) setting.I ran unit 2 on the green (low heat) setting. The unit heated very well for a period of 7 hours solid before going dead.I found the green setting to be great for keeping hands warm after they are initially warmed (by red) and comfortable.After letting unit 1 sit for a couple hours I tried to turn it back on and no power up at all. I charged unit 1 using USB-C (at 3.6 amps available). I found a full charge took 2.75 hours which I thought was a little slow, but liveable. Thus, the effective charge rate is 6 amps / 2.75 hours= 2.18 amps. I would guess that each unit uses 2- 18650 3000ma Lion cells in parallel.My conclusion is as follows: I like the look and feel of this unit. It is just the right size and curved shape to fit nicely in the hand. The case surface is matt black and has a soft, almost rubber, feel to it. It hides fingerprints well too. It heats on both sides. The power button in recessed and on top. Turning the unit on/off requires a hold of the power button for 3 seconds. So no accidental on/off. The heat setting button is easy to operate- even blindly in my pocket. If the unit is used in a pocket on high to warm hands from cold to comfortable for an hour, then switched to low to keep the hands warm, I would estimate a combined run time of about 5.5 hours. Thus, I feel the heat duration is very acceptable. If a person used a sweatshirt 2in1 pocket, one unit could be used at a time thus providing 11 to 12.5 hours of use. And one unit could be charging while the other is in use. I also found that the unit worked well to preheat my houseshoes for about 10 minutes. I think the unit would work nicely to preheat snow boots or ski boots or gloves. I do recommend this product with 5 stars.

These work great! My husband and I love these. Our winters get pretty cold and we are outside a lot of the time so these were a game changer. Keeps your hands and pockets warm. The charge lasts all day long.

I love this item, it can be a nice warm to an entirely fireball of heat. It has levels H1-H4, H2 being the most comforting. It's a lifesaver for me, I work in a lab with terrible cold conditions, and all my coworkers bought a pair themselves after trying mine out! The battery lasts 8-10 hours each, and they're bulky so I carry one at a time and I can warm both hands with one.

These heat up really fast which is great for a Renaults emergency. However, most of the heat comes from just one side and it would be nice if both sides reached equal temps. Holds a charge fine but takes a while to charge up. Decently easy to figure out how to use. Person I bought them for was wishing they were smaller because these don’t fit the best in small pockets. Color is really nice. Nice that they’re reusable so we don’t have to waste as much money on hot hands

These heat on the front and back. There is a digital window that shows you what percentage battery is remaining. They charge quickly. I don’t think there were directions so I was confused at first. Hold down the power button until L1 shows. These are the 4 lower settings. They only heat on the front side. Hold the circular button on the front to have the display read H1. Those are the high settings and both sides get warm. H1 is plenty warm enough for me. I have a condition called Raynaud’s Disease and my fingers get so cold that they go numb. I put hand warmers to the test. These have been great!

I got these for my wife who uses them a lot. They have various heat settings, a built in flashlight, and can even charge a cell phone in a pinch. Amazing price for their value. Fast charging.

Replaced my older Zippo hand warmer with these pair of hand warmers, with energy level indicators which are most appreciated when out in frigid weather. Quick recharging with cable built for two, works well as single…

Surprisingly nice, warm and good usb charger too.