I don't see why 10 hours is not possible; I have owned a VAIO PCG-U1 which pulled about 4.5 hours out of the normal battery and 8-9 out of the extended. The extended was no bigger than a paperback book and about 1" thick. Of course, the CPU was designed for portables(it was a Crusoe) and Apple's CPUs really aren't set up like that. Of course, Apple has yet to design a battery hog like a Pentium 4 (full version) housed in a laptop..... which gets you about 45 minutes of usage. >>It would be possible but you are dreaming if you want 10 hours out of laptop batteries, might >>as well use the AC adapter or a car lighter adapter. Not even new laptops can go 10 hours on >>a charge. __________________________________ Do you Yahoo!? New Yahoo! Photos - easier uploading and sharing. http://photos.yahoo.com/