Since they are just rechargeable, i am way more likely to take them along. Work well as hand warmers and are multipurpose as chargers. They work perfectly and both charge just fine.

The units are ergonomic and heat up instantly. Now my hands are warm and toasty at all times. When you turn it off it cools down very quickly, safely.

The average winter temp is usually 25-35, so it comes in handy. It makes being outside so much more bearable. In my state it is cold at 7:30 a. M. Here in so cal.

Great purchase. Highly recommended. The power remaining display is great.

On low it only heats one side and it isn't hot enough. Even more, the hottest (red) setting is less warm than the green (lowest) heat setting, which makes no sense. Can still be used as a backup battery but wasn't the intent of purchase.