I've been using these for a while and they work great but the red one is almost broken and although it looks like it has stopped working it works still! I bought them mainly because my rabbit chewed on my original charger but he didn't even touch them so that's good. And yes, I put them in an area where he can get them. In any case, they work great, I was just worried that they would break soon, but since they come with second ones, I don't have to buy a new pair for a long time.