What is the difference between "Show lowest battery level" and "Show average battery level" in "Dynamic tray icon"?

[Weltolk]

[timschneeb]

For example, if the left earbud has a 10% charge and the right earbud has a 20% charge:

• show lowest battery level will display 10% because the left earbud has the lowest charge of the two
• show average battery level will display 15% because that's the average charge of both earbuds