Change iPod 4G battery in few steps
15 minutos - 1 hora
My battery was almost dead, I couldn't listen the music for more that 1 hour, so I decided to replace it.
Actually, it was very easy, following the guides from iFixit.
Tha hardest part was the first step, opening the iPod. Since I have some experience from prior jobs, everything else was pretty smooth. It took me some 15 minutes at all.
I used only your guide, it was sure enough.