The official Zune 2 battery specs have been posted by ZuneInsider! Zune 4 and 8 for audio will run for 24 hours and play videos for 4 hours. For the Zune 80, audio plays up to 30 hours and video up to 4 hours. They’re very similar to what the iPods have and quite different from the numbers Engadget provided a few days earlier—20 hours of music and 5 hours of video for the Zune 80 and 20 hours of music and 5 hours of video for the flash Zunes.

Zune 4GB and Zune 8GB
Audio: up to 24 hours
Video: up to 4 hours

Zune 80
Audio: up to 30 hours
Video: up to 4 hours