While charging your battery to 100 percent more than once a month will not damage it, you should avoid habitual full charging.
You can do this from the lock screen without entering your passcode.
Low Power Mode requires iOS 9 or higher. You can also turn on the “Battery Percentage” option from this menu. This will display a number indicating your battery’s remaining percentage of life, which will allow you to budget your current battery life more efficiently.
High-performance apps, such as games or advanced software, will probably slow down considerably when in Low Power Mode.
Background refresh is when apps you have open (but not active) refresh their information, either over data or via wifi. This eats up a huge amount of battery life.
If you don’t usually update manually, you’ll need to remember to re-enable this feature when practical.
