An iPhone battery can die quickly if you use it a lot during the day. Much of the battery consumption will occur simply because the screen is on, but apps, and even certain settings and features on the iPhone, can contribute to your battery depletion as well.
The steps below will show you how to use a setting on your iPhone called Low-Power mode to automatically adjust some of the settings and feature on the iPhone that you don’t use very often, and which can aid in extending your battery life.
Step 1: Tap the Settings icon.
Step 2: Scroll down and tap the Battery option.
Step 3: Tap the button to the right of Low-Power Mode to enable it.
Enabling Low-Power mode is going to change a number of different things. Among the settings that it will adjust are Background App Refresh and a setting called Reduce Motion. You can click the links below to see how you could manually adjust these specific settings yourself if you find that Low Power Mode is negatively impacting your iPhone usage experience.
Turning on the Low Power Mode option is going to change the color of your iPhone battery to yellow. Low Power mode can also be enabled when your iPhone drops below 20% battery life. Once you get your battery to this level, you will see a pop-up that prompts you to enable Low Power Mode.
You can always navigate back to the Battery menu to turn off Low Power Mode if it is preventing you from doing something on your iPhone.