The battery stores just so much electricity. The lights use this electricity. Sooner or later the supply is depleted.

No, stars with the most hydrogen have the shortest lives. The more massive a star is, the faster it burns its fuel, and the sooner the core is depleted.

A cation has a depleted electron configuration.

We've depleted our supply of Cheetos.

Ozone is depleted everywhere. Some of the contaminats that deplete ozone in the hole, making it larger, starting sooner, and getting larger / deeper, also deplete ozone everywhere. Ozone has been depleting since the 1700s, not just since the invention of CFCs (after 1920).

The ozone hole is just a symptom of overall ozone layer health.