Teardown robot vacuum battery - what's inside?

Teardown Xiaomi Roborock, Xiaowa E20 E202 Vacuum Cleaner robot Lithium-Ion battery at Home and what's inside?

Vacuum Cleaner Battery on Aliexpress:
- https://bit.ly/3zuzRku

Vacuum Cleaner Battery on Amazon:
- US https://amzn.to/3Nkp5mu
- UK https://amzn.to/3MYxiOJ
- DE https://amzn.to/3gW18WK

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