Extremus Opalm Quick Charge Hand Warmer 10000mAh Rechargeable Battery, 3 Second Quick Heat and 15 Hours of Sustained Warmth for Outdoor Activities

At first glimpse, nice packaging and I like the fact that it doesn't seem like a cheap plastic unit, the purple/rose color is very nice and the ease of use is very simple. Comes with charging cable. It has 3 settings for temperature control about Low..95-107.5, Medium..107.5-118.5℉, and High..118.5 - 130 F. It really keeps you hands warm, I actually have it on a sore spot on my back as I am in Florida and it is not very cold here yet. It came almost full charge and did not take very long to get it to full charge! It has been on highest setting for about 30 minutes still shows full battery and it's still very hot. And, as a bonus feature, it is a portable charger which you can recharge you phone. This is a very cool product.. one word of caution.... the high setting does get very hot, but for those freezing hands or achy joints, I believe this will work very well.I will continue to use the product. Overall I would highly recommend this product! When I use up the battery with intermittent use, I will post an update on the review to see how long the battery actual lasted before having to recharge. Enjoy!

I bought the hand warmer at the end of last winter on sale as the weather was warming up; charged it up; and tested it out. Everything seemed fine. I put it back in the original box to keep until this winter. The hand warmer does not work AT ALL. It will not take a charge. Nothing lights up. And does not heat up in the least. It is a disappointing piece of garbage.

I charge it during the day and put it in my puppies bed at night with a plastic beating heart. Stays warm until mid morning next day.Very sturdy. Heats up fast.Excellent product.

Not very convenient to have in your pocket, too bulky and it doesn’t seem to get very warm

Very well thought out and designed. User friendly.Battery life - touted to be 15 hours continuous use. We've used it probably 8-10, so far, so good!Battery charge time - said to be 3-4 hours (which isn't really great but). Ours was mostly charged when we received it. Went ahead and charged it overnight and haven't run it down yet, so, I can't argue with their stated charge time required. NOTE: I would suggest letting the battery cycle fully (full-charge to full (or nearly full) discharge), especially for the first several charging/discharging cycles.Fast-Heat - as promised. Heats up very quickly - a feature my wife is particularly fond of!!Adjustable temp settings - also works as promised. Makes use much more adaptable to use under variable conditions. Also, as a side-note - GREAT for arthritic hands, etc., whether you're inside or out!The power-bank/charger feature is a really nice feature as well. Phone runnin' outta' juice and not near a power source? Pull it outta' your toolbox, purse, glove compartment, whatever, and charge it up.Don't think you'll go wrong with this one. I'd recommend it.

Heats up quickly

One of my bowling teammates is an older woman who always has trouble with her hands getting cold while we're bowling. She normally uses the little disposable hand warmers but they don't do a great job for her. I bought this for her and she tried it out last week and it works great!

Great hand warmer easy to use and lasts better than others