MMlove Rechargeable Electric Heated Socks - Battery Powered Thermal Winter Socks for Men & Women - Perfect for Skiing, Hiking, and Outdoor Winter Activities

I purchased the electric heated socks with rechargeable battery thermal socks for my mom because she has poor circulation in her feet. We have tried everything from microwavable natural rice pillows to heating pads to help with this issue but most products require her to be seated, which deemed difficult for her lifestyle.I purchased the medium teal color and wear size 6.5 shoes. The socks were a tad big for me with the heel sitting at my Achilles. (My mom wears size 7 shoes.) The socks arrived in a cardboard box with the batteries packed in a separate white box and the socks in a plastic pouch. The direction booklet is small and simple. The idea of the rechargeable batteries to power the socks are pretty self explanatory but it is essential for users to understand that the batteries must be charge a full 12 hours before first use. If batteries are not fully charge prior to first usage, they will not be as effective. Another hint is that the indicator light on the AC adaptor is red when charging the batteries and will turn green once is fully charged. The batteries themselves will always be red. All of these are indicated in the direction booklet.Once the batteries are charge, plug them into the socks and place the batteries in the pock on the side of the socks. The heating element sits on the top of the foot and there are three levels of warmth to the socks: high, medium, low. My mom started with the high and played around with the different levels. Ultimately, she kept the socks at high when in use. She felt that was the best and most effective for her. The highest level is not too hot and will not burn the skin.The socks is not a medical device and will not cure poor circulation on my mom's feet, but they have given her much needed comfort and mobility. I can't ask for anything more.Now that I found an extra battery source, I can give it a very good rating. For any newbies to extreme weather out there...I'm talking about -30 etc. ambient temp, some advice. Wear large boots such as Sorrels. Never cut off circulation. These socks work well on medium for about 4 hours so, if you are going for 8 hours OR in your emergency pack for when you get stranded carry extra batteries which can be found here:https://www.amazon.com/dp/B08MJV3ZW4?smid=A2529C0D7ZGNE5&ref_=chk_typ_imgToDp&th=1Don't expect them to provide the searing heat you would get from soaking your feet in hot water! They just keep the inside of your boot warm and they heat from the top of the sock. so, keep that in mind.Again bought for my dad he says buy good heated hunting socks, apparently compared to his old ( very old) hunting one the new one just don't last long he's almost 70 so idkWonderful sock, high quality. Keeps your feet very warm. Only problem I have is finding an extra set of batteries. No one seems to know how to get another set. Will look somewhere else for a set ghat has options for more batteries?Works good, wish it got hotter.Charge doesn’t last longSo I bought these last year and they ended up showing up late. So I didn't get to try them out. Which was extremely unfortunate because now that I have gotten to try them out. I would really like to return them. I've used them for fishing twice now. One time was out of the water it wasn't that cold out but I wanted to test them out. I wasn't very happy with the test. The second was a bit colder and I was standing in water with my waiters and extra socks on for insulation. Both cases my feet were cold and both times the battery didn't last for the full trip. The only thing these socks did do was they kept my feet warm enough that my toes didn't feel like they were going to fall off, but I still had very cold feet. The battery only lasted enough for a couple hours as well.Not worth the money. Could be useful for short trips or only cool weather days where higher heat is not required. Which most of use will likely buy these for very cold days. I found a different pair that is only $10 more and they claim the battery has twice the life. I may try those.Don't like having to pull up my pants to get to the power button. They should make a remote control for these to carry in your pocket. Other than that, these work excellent. My husband's only complaint was he had to pull his pants up to turn them on/off. If you turn them on and walk your feet get sweaty which dampens your socks..a remote would be fantastic.