I just changed my battery following the German transcript.

Warranty void sticker and sadly the battery strap were missing in my phone.

So i had to poke under battery with my spudger. And by sheer luck the phone survived. The copper circles in the battery’s aluminium trunk are not sticker material as i thought, but holes in the mid frame with copper foil under them, already belonging to the display unit. That’s were i was poking and sliding around, scratching the foil, but as mentioned not with fatal consequences. Phew.

Insert tools to lift the battery in a way to avoid these holes, which is particularly hard at the position of the speaker, which is also about the only spot where you can get under the battery…