It’s simple to turn on too.
Here’s where to look.
Scroll down and tapBattery.

Tap the toggle next toPower Saving Mode.
Many phones will tell you how much extra battery life you’ll gain for doing so.
Alternatively, tapSuper Power Saving Modeto extend life further.

Here’s how it works.
On the Battery screen, tapPower Saving Mode.
TapTurn on at specified battery leveland toggle what percentage you wish it to switch on automatically.

TapTurn off automaticallyto switch Power Saving mode off when your battery reaches a certain percentage.
How Else Can I Adjust the Power Saver Mode?
Within the Battery options, many phones come with other power-saving options.
Here’s where to look.
On the Battery screen, tapApp battery management.
Tap an app you wish to tweak.
Choose to toggleAllow foreground activityorAllow background activityto adjust how much the app uses your phone’s battery life.
Some apps won’t operate correctly if you stop them working in the background.
TapPhone battery usageto see which apps are using the most power.
TapMore battery settingsto make further adjustments specific to your phone.
Is It OK to Turn on Battery Saver All the Time?
It’s possible to leave Battery Saver Mode on at all times.
Here’s a quick overview of the pros and cons of doing so.
Is Battery Saver Good or Bad for Your Phone?
There’s no harm in using Battery Saver mode on your phone.
Does Battery Saver Ruin Your Battery?
There’s no risk to your phone’s battery when you use Battery Saver mode.
In some ways, it may even extend the battery’s life as you aren’t constantly recharging it.
Ultimately though, you don’t have to worry about it ruining the battery while using this battery-saving mode.
On an Apple Watch, this feature is called Power Reserve mode.
To turn off Power Reserve mode, you’ll need torestart your Apple Watch.
Press and hold theside button, then tapPower Off.
Then, press and hold the side button again, and release it when the logo appears.