My battery was swollen so badly that it was easier to start at the bottom when I removed the case. I used the blue plastic iPod opening tool that I purchased as part of the battery repair kit. Started where the case was already separating near the cable connection then carefully worked my way around the entire case. The hardest part for me was removing the battery cable cause my fingers are kind of "stubby". All in all an easy and quick fix for a very reasonable price - Thank you ifixit!