On Wednesday, July 2, 2003, at 01:55 PM, Ron nie wrote: > hi.. it is healthy to leave the powercord plug in the > whole time, even if u want to leave the pbook in the > sleep mode? > thanks.. > I don't see why it wouldn't be healthy. Since Powerbooks use lithium-ion batteries, I don't believe that it would be problematic. Also, eventually the AC adaptor will sort of cool down, because it won't need to pump in as much power as before. So, to answer your question, yes.