Great guide. Mind you, the cover is REALLY, REALLY hard to get off. I broke a few plastic tools, tried it with a metal one but made a tiny crack on the screen under the home button, so don’t do that. You can also expect some blood, as I damaged my skin a few times trying to get it open ;) Once this was done it was quite easy, though some screws don’t come out very easily. Oh, and I had some cheap tools which wore out, so I had to find better ones. I’m currently attempting to calibrate the battery, and I’ll see how it goes. I also changes the charging port while I was there, which is even simpler than the battery. So if you’re changing the battery, change the port also, it’s really cheap and it does make a change.