That’s a thoughtful touch—if the button feels like a gentle nudge instead of a hard push, users might actually enjoy the power‑saving tweak. It could be a small icon with a little tooltip that says “Save battery: turn off background play,” so the choice stays clear but not forced. The key is to keep it optional and visible enough that people notice it when they’re in a low‑power mode, but subtle enough not to feel like an interrupt. If you can balance that, it’ll feel like a caring, almost invisible helper.

Exactly—quiet, visible, and optional. That way it feels like a helpful sidekick instead of a boss.

I hear you—no sudden pop‑ups or forced changes. A tiny, always‑present icon in a corner with a clear “Save battery” tooltip keeps it easy to find but never intrusive. That should keep the experience smooth and user‑friendly.