I couldn't find anyone who had done a full teardown of this key FOB so I made this video. If you intend to open your key, TAKE YOUR TIME...be careful and it'll all work out.

REPLACEMENT BATTERY https://amzn.to/38Ek9o9
MultiTool https://amzn.to/2VZ0wSK
Camera https://amzn.to/38Lr13m

Hat https://whr.institute/products