Apple has revealed three tricks in a special memo, urging people to tweak settings "if the battery in your iPhone drains too quickly".
They're all easy changes to make, won't massively affect your iPhone experience, and Apple says they'll "extend battery life".
DON'T let your iPhone's battery run dry because of a few rogue settings.
If Auto-Lock isn't active then if you set your iPhone down and forget to lock it, it'll keep draining battery.
So if you're constantly running out of iPhone juice, try these settings as soon as possible.
