I just purchased a silicon skin case cover for my htc hero and I charged my phone and it seems like it's taking longer to charge I don't know maybe I'm seeing things.
Should not unless the cable is not being allowed to go in completely, also make sure it is not getting to hot!!
One thing I noticed is that if you charge your phone while you have it completely turned off, it will charge so freaking fast!!! I mean, a LOT faster than when you have it turned on!
