According to Computer World, behind the scenes Facebook application will do a lot of activities, and it is certainly an impact on the battery quickly drains.
Unfortunately some of the functions that run it are not very useful for many users, the example features VoIP calling services in the application.
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Facebook instant messaging application attached to it also accounts for the battery life of your iPhone quickly subsided. As quoted on Thursday (04/09/2014).
But no need to panic, there are some easy steps that can be taken to minimize the battery consumption of a Facebook application, ie by turning off unnecessary features.
For example, by turning off the function 'Background App Refresh' which is present in Facebook settings menu. Deadly alone claimed to have enough savings. Easy is not it?