I would HIGHLY suggest removing the entire motherboard when performing this repair. It’s just another few screws and a few ribbon cables to take it out, and it will make removing and installing the new battery 10 times easier and allow you to align it properly. The guide is not kidding about the adhesive holding the back of the battery in place - it is very strong! I ended up using a heat gun on the back side of the device (underneath the kickstand) to help soften it a little bit, and an old credit card to help pry the battery out.