Do you always measure ingredients exactly when following a recipe? Do you say things like, "According to my pedometer app, I've walked 3.8 miles today."? Do you use decimals when filling out your weight on medical forms?
If you do, you'll be happy to know you can also quantify exactly how much battery power your iPhone has left.
Simply go to Settings>General>Usage and toggle Battery Percentage on. The battery percentage will now appear to the left of your battery icon.
And just like that, the nagging discomfort of not knowing exactly how much battery power your iPhone has will be eliminated.
Now you can go around saying things like, "My iPhone's battery percentage is down to 22 percent; time to plug it in."