How long can an itouch battery last if you play music?
An iTouch battery can last up to 18 hours when you just play music. On condition that you don't run a big app and the backlight is off, you will be fine. Playing music does not normally drain the battery in most devices.
It will last way longer than a app. Maby 2 hours.
Buy another battery as back up, or get one that holds more charge. When you play music, it draws more power then normal operations..