Experiencing some excessive battery drain? Hangouts may be the culprit. With the 2.1 version of Hangouts, users have been noticing the app is really punishing battery life. On the Google Product Forums, people have started chatting about it and Google is listening. The engineers reportedly found a potential fix for the bug. When any fix will be issued, no one knows. But hopefully they do so before mass riots ensue. Damn you, Hangouts.
Source: Google Product Forums