Originally Posted by Sad Professor
Yeah, processing with the hard drive spinning. I assume you were plugging it in every chance you got.
Re getting RAM yourself, yes, but keep in mind you can't do this with the Air. The RAM is built-in and you can't upgrade it. So don't under any circumstances get the 2GB model.
Oh, well I only did it twice so it did not have any meaningful impact on the battery AFAIK. (the Macbook is still going strong on the same battery.)
The Air can not be upgraded? Well I suppose 4GB is plenty for an Air considering you are unlikely to be using it for "heavy lifting".