People are just realizing iPhone has hidden-button that stops ‘vampire’ battery drain in seconds

APPLE'S newer iPhones usually have good battery life but apps can affect the quality.

If you find yourself with an iPhone that loses juice too quickly you may want to try out a feature hidden without your settings.

It's called Background App Refresh.

Apple : "After you've switched to a different app, some apps will run for a short period of time before they're set to a suspended state.

"Apps that are in a suspended state aren't actively in use, open or taking up system resources.

"With Background App Refresh, suspended apps can check for updates and new content."

The feature may be useful but it also drains your battery so you may want to hit the button to turn it off.

Apple even admits: "Turning off apps may help preserve battery life."

Go to your Settings apps and click "General" and then "Background App Refresh".

Here, you can click a toggle to turn it off.

You'll also see two other settings that say "Wi-Fi" and "Wi-Fi & Mobile Data".

If you find turning it off leaves you feeling less in the loop with your beloved apps, just follow the above instructions to turn it back on in seconds.

Alternatively, try the "Wi-Fi" only setting.

It means you won't be wasting your data and battery to refresh apps when you're out and about but they will refresh when you have Wi-Fi.