Re: W10M Insider Preview 14342 Issues (Redstone branch)
Ran all day with cell data off. While it helps, it seems that on WiFi the battery drain is back with the svchost.exe running a full core's worth of CPU. So, yes, turning cell data off helps because it's not connected to the Internet as much when you're out and about, but the bug is back when you get to WiFi. Might just blow it away and go back to release preview until the next build.
I ran all day with this scenario:
Signed Out of Photos App (this then kills the ability to pull photos/videos from my One Drive and I believe that also kills the ability to have the Photos backed up automatically from Camera/Video as they are taken)
Hey Cortona turned off
with both of those turned off, I was able to run 3hrs of FM Radio (thru FM Radio App, no longer a built in OS app now) from a 100% full battery, it was ONLY down to 89% after 3hrs of FM Radio listening.
with either one or both turned on (signed into Photos App, Hey Cortana turned on) battery drain is HUGE and 3hrs of FM Radio from 100% charge was down to 25%.
the Photos App signing out was a tip someone else posted.
I noticed in Photos App that when I signed back in, the sync arrows kept turning. Kept checking on that every 5 or so minutes and it NEVER seemed to STOP looking or attempting to Sync. Once signed out, sync stopped.
This all on Lumia Icon