One of these didn't even last a month of use. The button that you click to turn it on decided that it would only stay on for 3 seconds and shut back off. I really liked the weight of these too. I used them just going to and from my car at night because it is dark on one side of my house and these helped light the way to get back inside. They were nice and bright. The other one is still working fine but the one, I have tried making sure the battery was fully charged but it is not the reason the button won't stay on longer than 3 seconds.