Chosen Solution
I have a 7th generation iPod Classic with 160GB (A1238 model). It works perfectly well when connected to external power. At that time, the battery is shown as fully charged also. However, if I disconnect it from external power, it does not even come up. Have tried Reboot (Select+Menu) etc but in vain. I have tried to drain the battery but as soon as I remove the external power, the display and the iPod shutdown immediately. Hence battery is never drained. Any idea what could be wrong?
On your Mac, download, install and run Coconut Battery. Go to the iOS feature and see if it will give us a comprehensive report on that battery. https://www.coconut-flavour.com/coconutb… iPod Classic Battery Replacement
You need to replace the battery, iPod Classic Battery Replacement