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So, I took and started up a few Zunes and iPods with full battery charges, etc last week.

All within a 2 minute period, I powered them all on after fresh full charges. I have the earbuds that go with the player (except I have ultimate ears on the Zune 30) plugged in to them. I am going to run them all until they quit. All the players are on shuffle all songs repeat mode.

The 1st Round results were scary for Zune, but I realized I had left the WiFi enabled on the Zunes, so I did it again (round 2)

Round 1 Results (1/2 volume, Contunious library shuffle and repeat with WiFi on the Zunes):

• Zune 30 – 12 hours 45 minutes
• Zune 8 – 18 hours
• Zune 80 – 20 hours and 20 minutes
• iPod Classic 80 – 31 hours and 15 minutes
• iPod Nano Fatty – 24 hours and 20 minutes

Round 2 Results (1/2 volume, Contunious library shuffle and repeat with WiFi OFF on the Zunes):

• Zune 30 – 12 hours 15 minutes
• Zune 8 -  18 hours and 45 minutes
• Zune 80 – 24 hours and 15 minutes

I hope to have time to do a video test as well as a Zune 80 vs. iPod 80 test side by side with the same cd ripped and added to each of them in the same format soon.