Battery drain on Cyanogen OS 13.1 I have a OnePlus One running stock Cyanogen OS. Before the upgrade to 13.1, I was getting 24-48 hours of battery life, but now I'm only getting 6-8 hours.

Wiping the system cache doesn't help. Hard reset doesn't help. What can I do?
This is a bug in Cyanogen OS 13.1. Go to Settings &gt; Personal &gt; Apps, open the three dots menu and select Show system. Find Google Contacts Sync in the list, select, and tap DISABLE.

I am not sure as of yet whether this breaks any functionality.