Battery Power for LilyPad

Can anyone tell me what sort of battery would power a lilypad arduino board i.e the output voltage etc, shot in the dark really as i dont really understand

Many thanks for any help

being a mega 168, you can probably power it anywhere from 3-5V, maybe lower.

Hi thanks for the information, its very strange i litteraly found this information last night.

Thanks for the help, much appreciated