The Microsoft Launcher 5.0.1 build has been reported to cause severe battery drain issues for users both on the beta and stable release channels. To address this, the Microsoft Launcher Engineering team has released a test build for those who are suffering from this problem, which needs to be installed manually and has special debugging tools built-in.
The first thing you have to do is downloading the Microsoft Launcher 220.127.116.11.47080 test build and installing it manually. Make sure to enable 'Unknown sources' from your device's Security settings to be able to install apps from places other than the Play Store. Also, note that this special build does not have the Timeline feature.
Proceed with using the app and your device in the usual way that you do it for more than three hours and if things look fine, then please report in an email format at firstname.lastname@example.org with a title "Google+ user battery issue: ...". If you are still experiencing the battery drain issue, there is a CPU profiling tool in Settings - Utilities - Analyze CPU usage. This will collect data in the background for just a minute while you are doing your thing and the outputted log file you will get to attach to an email and send it to the same address and with the same title as we mentioned right above.
If the problem is still there, you can try doing the following changes and report back if they do fix it:
- Sign out and sign in again with your Microsoft Account.
- Disable the News Tab in the Feed page by toggling it from Settings - Your feed - News.
- Disable the Feed entirely by switching of the Your feed option, which is the top one in Settings - Your feed.
- Make sure to check for memory leaks by tapping on Analyze memory usage in Settings - Utilities and send the results to the MS Launcher team.
For more info and tips you can join the Microsoft Launcher Beta community on Google+.