I needed to replace a battery in an old ipod shuffle. I watched a couple of videos in which they used special little plastic tools to open the case. The videos were made by a company which sells the batteries. I went to their website to place the order, and the batteries come with the plastic tools for about ~$5-10. The most complicated part with the ipod was that the battery had to actually be soldered, but thankfully I know how to do that so it wasn't an issue. It took me, an untrained person, about 1/2 hour to fully repair the ipod back assembled working condition.