Chosen Solution
ipod classic only lasting 20 min when fully charged
Its Time To Change The Battery …. Hope It Works Thanks Varun
this sounds like you may need a new battery. no matter how good of a battery you have eventually if you use the device you will need a new one. battery have an finite amount of charges before alas even they die. the way you can tell if your battery is dying a lot of the time is if it no longer holds a charge for very long. I am sorry that this has happened to you and obviously you have used your ipod a lot over the years. I hope that this answer helps you out.
