Apple claims 30 hours of music for the touch, and Microsoft claims 33 hours for the Zune.

iPod Touch specs, footnote 8: iPod units were associated to a Wi-Fi network and Auto-Brightness was turned off; all other settings were default

Zune HD specs: Music, up to 33 hours (wireless off); video, up to 8.5 hours

Цитата от(из) GeekFox:

i guess not, mAh is a unit of electric charge, which equals 3.6 coulombs, while mA is a unit of electric current, which equals 0.001 coulombs/second.

Hmm... 1 hour = 60 minutes = 3600 seconds. Therefore, 0.001 C/s equals to 3.6 C/hour, n'est-ce pas? If the device consumes 26.3 mA then it lets through 0.0263 coulombs each second, i.e. 2840.4 coulombs (789 mA·h) during 30 hours.