grahamcurtis1, Aug 19, 2017 : About two weeks ago my OPO suddenly started draining when in standby at the rate of 7-8% per hour (instead of the previous 2%). The battery setting shows that the only battery usage is Cyanogen Mod System, Cyanogen Account, Google Play Services, Android OS - no others - in particular no apps. It looks like systems are working in the background. Cyanogen OS 13.1.2-ZNH2KAS3P0-bacon Android 6.0.1 The systems update on the phone is showing fully updated Any suggestions??