Turn Off Your iPhone if You’re Running Low on Battery

On the other hand, if you have little battery left for the day and have nowhere to charge your iPhone, turning it off will be the perfect way to preserve battery life.

By turning off your iPhone, nearly everything that consumes your battery power shuts down entirely, making your iPhone’s battery last for as long as you need it.

That way, if you’re in a pinch, you’ll know your iPhone’s battery will last as long as you need.