Can you name these instances? For research purposes.

What does this dirt at the background even mean?

Good idea, terrible execution. I'd prefer they make manufacturers display the state of a battery (iOS already has this) and provide a single free battery replacement, which doesn't expire with a warranty period. Also, battery replacement service should be free, customers should only pay for battery itself. Current implementation is ridiculous - I don't want the return of fat smartphones with detachable battery.