Yep, me too. I'm waiting for a 10.1 stable ROM cause 10.2 beta has a lot of cool featureas and maybe they'll be available on the new stable aswell. I had GREAT battery life on stable 10.0.1/5
Since yesterday I have amazing battery drain, without me doing anything. I did not update I try to close some apps but they close automatically, waiting for new weekly update on my mi8 EE (Ursa)...
8.12.13 - no longer battery drain. 4h SoT in 14h with everything on (4G, Wi-Fi, BT, location just 2h on high rest power saving) and 47% battery left!
Much improved. Waiting for the new stable, hope will be as good as this beta.