I was wondering if the different power adapters for the different Macbooks are compatible with eachother even though they are different sizes. Specifically, I just purchased a Macbook Air. About once a month I visit family for the weekend, and they have a Macbook Pro. Can I leave my Macbook Air power adapter at home and simply use their Macbook Pro power adapter to charge my Air? I am aware about the difference in the end of the magsafe plug, but if I boost my Air up on a book I could easily use the Macbook Pro adapter to charge my Air. I just want to know if its compatible or if it will cause any damage.