iPod touch turns off when unplugged

Hello,

My iPod Touch only turns on when its docked on my radio/ipod dock but will immediately turn off as soon as I take it from it. It won't even turn on and sync when connected to my macbook. The iPod has never had battery problems or anything else wrong with it.

Any ideas would be awesome, thanks.

thanks for the reply, i dont have a mains adapter though. would it be the same as putting it on the dock for awhile?