I saw that video about 2 years ago. For a start, iPod batteries have improved dramatically & 2nd they can be opened up by service. You can even pay a package so that if your battery should fail within a certain period it will get replaced & also you get immediate replacement in any case if your battery fails.

iPod batteries are similar to digital camera batteries. You need to look after them. There's certain processes of charging you need to follow to obtain the maximum life out of the battery. Problem is too many people don't like reading instructions & just plug & play & don't give their batteries the appropriate treatment for them to sustain a prolonged lifespan.

Keep in mind that's an old video article. And also a bit of hysteria raising b/c people don't think they need to show any care for their digital equipment. The instructions for battery recharge are almost identical to those for digital cameras! Lithium rechargable batteries are lithium rechargable batteries whatever they're used for. Follow the instructions for battery care & you should get maximum life out of your rechargable batteries.