Facebook's application for Android could drain your device's battery faster by up to 20 percent. The app by Facebook, the most popular social networking service, runs in the background constantly and consumes a lot of CPU time and RAM - even if you're not using it, or have it in a logged out state. This report based on an in-house benchmark using Samsung Galaxy Nexus (GSM), Android 4.2.2 and Facebook 3.4. A good alternative to Facebook's app is to create a bookmark linking to Facebook's mobile website on your homescreen.

 Extend Your Android Device Battery Life By Removing Facebook App @ NgoHQ