How can I change the battery image on my iTouch?

I have seen people with a duracell battery as their battery image on the charging screen on their iTouch or iPhones before, does anyone know how to change that?How can I change the battery image on my iTouch?
it is a simple theme and/or icon change that can be manipulated to custom images, you must first have jailbroken your itouch, youtube it ';jailbreak itouch'; also check the firmware version you have, you prob have 1.1.4 . once you jail break it go to the installer app and make the modifications you likeHow can I change the battery image on my iTouch?
I think you would have to download it from somewhere unless it is in the settings...

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bird