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Cnet has published their “official” battery test results today…

Cnet gets the following:

• Zune 80 Wifi On – 18.5 hours
• Zune 80 Wifi Off – 22 hours

My 1st Round got:

It’s really funny that these came out today since I started my 2nd round test today at 7PM CST. I am testing the Zune 30, Zune 80, and iPod Classic 80 this time. All three have the same album ripped in MP3 format this time, so all 3 are using the same content only. They are all at 1/2 volume with earphones connected and WiFi off.

Our CNET Labs have just published the results of their Zune 80 audio-only battery drains and the numbers are somewhat disappointing. Microsoft rated the Zune 80 for 30 hours of audio playback with the Wi-Fi feature turned off. Lab testing revealed that the Zune 80 is realistically capable of 22 hours of audio playback with the Wi-Fi feature turned off, or 18.5 hours with the Wi-Fi feature enabled.

While 22 hours is certainly better than the 13 hours we got from the first-generation Zune, it’s nowhere close to the 45 hours we were able to get from the competing 80GB iPod Classic.