when the battery is removed.
It is a design thing
I've got a late '06 Macbook Pro, running OS 10.4.11, 2GB RAM, 2.16GHz processor. The battery recently died, but that's not a problem as I run it via the power adapter when at home. Problem is, since the battery packed up, the computer itself is running slower than when the battery was installed. Is this usual? It's a dualcore processor, and was previously fast enough to watch HD movies, but now HD movies are jerky, and the whole overall operating system seems noticeably more sluggish.
Any ideas...? I'd rather not replace the battery straight away, if I can help it...