Why is my iPod cant keep a charge

Why is my iPod cant keep a charge

every time i plug my iPod up and let it charge,and when i unplug it the battery runs out really fast

answers:

If you have the original battery in there it probably has just worn out. Replacing it with a new one is what I would recommend. Just make sure to buy the right one as there is a thin and thick version of this iPod.