Zune Battery Life
Here are some tips to extend your zune battery life
Try To Play Only 128Kbps WMA files
The zune battery has the best performance when you are playing 128kbps windows media audio(WMA) files. If possible, convert other music formats such as mp3 to WMA format.
Backlight Settings
Using backlights can drastically reduce their zune battery life. If possible, try to reduce the backlight timing to either 1 or 5 seconds. Do not set to always on.
Brightness Settings
The brightness settings is another factor for causing the drain on the zune battery. If you can in an environment where it is bright for example in school or office, then you can set the brightness to low.
Wireless Settings
The wireless chipset on the zune player can consume a lot of battery resources when turned on. If you are not sharing files, it is best to turn it off. The amount of files you send or receive when sharing can also affect the zune battery.

