Chosen Solution
My ipod has a battery next to a exclamation mark when I plug it in. What the heck does that mean!?
This means you’ll need to replace the battery since the iPod detected values out of normal range. Could be that the battery simply reached the end of its life cycle. Follow this guide if you want to replace the battery yourself: iPod 5th Generation Battery Replacement Opening the iPod is by far the most difficult part, so be careful to not stab yourself or to mess up the metal casing. (If you do happen to mess up the casing there are lot’s off after market casings).