If you’re buying the battery from iFixit I strongly suggest getting the full kit and not the battery-only option so that you get the glue and the gasket. Great guide, thank you!

I had a lot of trouble with this. Only two came out properly and the others snapped off. I heated up the back of the phone with a hair dryer then used the flat end of the spudger to slowly pry it off right to left, bottom to top.

At this point I would have found it easier to remove the glue from the edges than later on when I was reassembling it. I bought the kit that had the replacement glue in it.