Guide with all the steps necessary for you to change the battery of the iPhone 7 Plus yourself.
In the lower part we will find two pentalobe screws TS1 (0.8mm) which we will remove.
To separate the screen, it will be advisable to have the right tool, otherwise we could break the flex cables of the screen. If we do not have the tool, it can be done with a normal suction cup or in the traditional way, prying at the edge of the screen.