Battery saver mode. Battery saver mode changes certain settings to conserve battery power until you can recharge your phone. From the Battery saver screen, tap Turn Battery saver on (at the top of the screen) to set the phone to activate Battery saver mode immediately, when the charge drops to 10%, 20%, 30%, or 50%.
Is it better to charge Iphone on low power mode?
The fastest possible way to charge your phone is to put it into Airplane Mode and turn off the screen. However, low power mode is almost as good and it will charge far faster in low power mode than in regular mode. Whoever you heard that from was not only wrong, but told you the complete opposite of the truth.
What does low power mode do?
Low Power Mode reduces the amount of power that your iPhone uses when the battery gets low. To turn Low Power Mode on or off, go to Settings > Battery. When Low Power Mode is on, your iPhone will last longer before you need to charge it, but some features might take longer to update or complete.