I didn't know that

There's so much I don't know. It would be an everlasting theme for me to write about.
Some things I learn are counterintuitive. Like what I just read about HERE.

It used to be that turning off your car engine at a long stop, say, for a railroad crossing, was a way to save gas. Then some said the restarting of the car engine used more gas than was saved by turning off the car. I'm sure there's a way to calculate all that. Our hybrid car does that automatically.

That's the theory about ending apps on your iPhone. I frequently end apps that are running on my iPhone. I figured that getting rid of apps I'm not currently looking at would save battery life, and help with performance. 

​Apparently, I was wrong, at least according to that article. Apple is so efficient with the handling of apps not in the foreground that ending them, just to start them up later, is less efficient and more energy intensive. Read it Here.