After using the size chart a ordered a medium, but they were too small. I exchanged them for a large. The battery has to be put in the pocket plug first. Battery life is good. I was disappointed that the fingers didn't get warm, even on high wearing the outer glove. I was taking photographs with a camera, so I had to take the outer glove off a lot. The right hand outter glove is extreamly hard to get on over the inner glove. The touch compatibility is bad. I tried both hands, and different pressures, but they did not work most of the time, the reason for 3 stars. I have a vest too, which is great. In the house with the vest turned off, it feels like it is on, so I will put it on if I'm a littel cold. I think the prices are good and would buy them again.