Haven't posted here in a while but wanted to share how ridiculous this situation has been. The december update screwed up my battery indicator pretty badly; regardless of how charged the battery is the indicator doesn't change. it stays at some low percentage and keeps warning me that my battery is low. Now the update just showed up for me this afternoon but... it won't let me install unless it is plugged in and fully charged. which it never does. because the indicator is broken.
So now i'm letting the battery drain for the next few hours in the hope that after charging from empty i can install the update.
Sleep issue seems to be resolved but my device still idles at 30+% CPU utilization (System and System Interrupts) causing the fans to kick in, mild overheating and fast battery drain. This is a brand new replacement device (finally) 100% stock no apps installed