These are great. I am under the impression that you can never have too many of these. We go through them like crazy. They dont last forever and we often tend to lose them as well. Between all the phones and tablets and other things with USBs that we have, we have tons of these in use. I love that these are colored. They are really pretty. I have noticed that they work really well and charge well. I have not had any trouble with them dying yet so that is awesome as we use them a lot and I have had them for a while. However, they do get really hot so I wouldn't recommend setting them on fabric or anythin like that. They should be out in the open on a hard (not plastic) surface.