1) Use Wifi to browse 20 pages in a loop, spending 20 seconds on each page, while playing MP3s in iTunes. 4hr 16min 2) Play a DVD image (off the internal hard drive) in a loop. 3hr 25min 3) Download 10GB of files, Web browsing loop from #1, play two 480p Xvid videos in a loop. 2hr 25min