Opera launched a new Power Saving mode in Opera 39 to improve the web browser's battery life during mobile use.
Opera's own tests showed that the browser's staying powers improved significantly with battery mode enabled. It is still too early to tell how big of an impact battery saver mode makes on day to day operations, but it seems clear already that it extends battery life of devices to a degree.
The first version of Battery Saver shipped with little options. Opera displays the battery saver icon in the interface when it notices that the computer is running on Battery.
A click on it displays the interface that enables you to turn the feature off or on. The only option that shipped in Opera 39 was to display the Battery Saver icon all the time in the interface.
Opera 40 ships with improved Battery Saver options. The browser is currently available on the Developer channel only.
The main change for all users is a new battery left indicator that is displayed when you click on the icon in the Opera toolbar.
Opera made the decision to hide the options behind a flag in the browser stating that they are reserved for experienced users currently.
This is puzzling considering that the options require no degree in computer science. The only explanation that I have, apart from keeping things simple is that Opera may add more options to Battery Saver later on that are designed to give experienced users better control over the feature.
First, here is how you enable the additional Battery Saver preferences in Opera 40:
The new options become available on opera://settings/ after the restart. Scroll down until you find the Battery Saver listing. The following options are listed underneath it currently:
The new options give you more control over the feature. It would be great if you could enter a custom value instead of one of the available ones. Also, it would be useful if the browser would highlight the difference Battery Saver makes when enabled by displaying how long the device would run with and without it.
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