depends on the use you give the ipod, to watch movies it can last some 8 hours, on music it can take some 30 hours, wifi, apps and the brightness can reduce your battery to a mere 4-5 hours
12hrs
Ipod nanos last about a good 12 hours on a fully charged battery. The time varies depending on how often you stop it from going on continuously.
54 hours !
4 hours
Each ipod's battery will last for a certain number of charges. Charging your ipod touch alot isn't bad, but will cause you to need to replace its battery sooner.
it last for 1 year or malfunction
When new and fully charged, the battery provides up to 8 or 12 hours of battery life
4 hours
1 hours
Whether you have just started using your iPod or are looking to make the battery last longer than normal, consider the following tips: Charge the battery only when it runs out. Charging it too much can actually result in a shorter battery life. Keep your iPod at room temperature. Leaving your iPod out in the cold can damage it. Turn off your iPod when unattended, as leaving it on can quickly drain the battery.
You are either using it a lot, or the battery is not working properly, and you need a replacement.