I am not sure most of my movie are anime episode. And they ended up 30 mb each high quality divx. And i was able to watch alot of anime before it ran out and it took 7-9 hours. But i had breaks. Plus i have a backup battery also
I've just tested mine with a 2 hours best quality video/audio movie, volume on maximum (stereo) and backlight on. At the end of the movie the main power was at 53 %.