Two days ago my Sony Xperia J phone's battery began to be drained very quickly. It seems, the Exchange service has gone mad (it uses 57% of the battery time). It polls constantly, I get a new mail every minute according to it (I have only 1 new mail actually). I already restarted the phone. It even polls when it requests a security update.
What have gone wrong? Did Google release a new version of it?