Battery saver helps extend battery life until your next charge. Your phone can prompt you to activate it when the battery is low, or you can enable it anytime.
When the phone is in Battery saver mode, you'll see 
When you use Standard battery saver, your phone will:
Maximum battery saver makes the same adjustments to your phone as Standard battery saver, and more.
Maximum battery saver will pause all apps and their notifications, except for these essential apps:



You can assign other apps to be essential. For all other (non-essential) apps, the icons appear gray, and you can't use them until you switch to Standard battery saver or turn Battery saver off.
Maximum battery saver will also:
Open quick settings and tap 
To turn Battery saver on when your battery is below a specified level:

To prevent your phone from turning Battery saver on before you need it, you can set it to turn off when your phone is charged to 90% or above:


To see which type of battery saver you're using, open quick settings and look for the label on the Battery saver tile 
To switch:


Select one:
To adjust how Maximum battery saver works:


Adjust settings:




