Battery only lasted about 1 day on charge without using it.
All went well with the disassembly. Problem came when putting it back together. There is a little ribbon cable from the touchscreen that is very short and does not like to be put back on by human hands. I finally got it back together and now this old iPod Gen4 is working like new.
Take your time when putting it back together and watch out for that little touch screen cable. You will get it, just go slow.