Does live multitasking and the Events screen consume much battery power in Nokia N9?

To preserve battery life, some applications, such as Maps, video player and camera, enter stand-by mode when you swipe to home and leave the application running in the background.

The browser pauses javascript and other potentially battery consuming tasks when you swipe to home. This prolongs battery life, and also helps save data costs. Still, you can easily return to the pages where you left them.

In the Events view, feeds are updated in the background in pre-defined time periods. This keeps the view fresh but preserves battery life. You can also refresh the view manually, if you prefer.