With the help of a fine opening tool we are unhooking the back shell. We have used a metallic tool, but it would also be worth a plastic as a spike for example.
Step 2 Battery
We disconnected the battery, and pulled the stickers that are on the battery. You have to pull the stickers carefully as there is a possibility that the sticker will break.
Video Tutorial summary
In this video you can watch a quick summary of the tutorial, but we recommend to follow the complete tutorial, with its explanations and detailed images.