If the battery icon turns yellow, what you’re seeing is an indicator ... or that someone else triggered it after you briefly handed your phone over to them. You should probably turn the mode ...

Have you ever been puzzled by the yellow battery icon on your iPhone’s home screen ... level falls under the critical 20% threshold—the phone undertakes a series of adjustments to minimize ...

The yellow battery icon on your status bar means that Low Power ... This gives you a fresh battery, can improve phone performance, and is far cheaper than buying a new iPhone.