I second your results with regard to 1.1.33. It does drain battery pretty bad. Perhaps solving this problem fundamentaly is challenging. However, I think could be mitigated if the "Battery Saver" mode would work properly. Ideally, when the app is in "Battery Saver" mode, it should completely disconnect from peers, stop listening to ports, etc. Thus the app would stop preventing deep sleep. In reality, this mode stops syncing, but does not stop communications. I ran a quick tcpdump today and it shows continuous chatter between my phone and my PC, even when in Batter Saver mode. Hope the developers have a look at this.