Facer 4.5.9 is is rolling out to the Google Play store right now and should be available worldwide by the end of the day. This release fixes an issue that could cause higher battery usage than normal in some situations on some Android Wear devices. If you were seeing bad battery life, please update to this version and make sure your watch is also updated to Facer 4.5.9. If you are still seeing unusable battery life, let us know in this thread and we'll continue investigating.
The Facer crew