I've had this phone for a few days now and I notice some mean battery drain that happens from time to time. I dumped a Bug Report via developer options, and used Google's Battery Historian after leaving my phone unplugged and idle overnight after a full charge and reboot. The tool seems to show that the following kernel wakeup reason seems to be the problem and holding the phone awake for over 1.5 hours:
Ranking Name Duration/Hr Count/Hr Total Duration Total Count
0 Abort:Wakeup IRQ -1111803216 (null) pending 10m8s737ms 779.87 1h34m13.62s 7243
The only thing that looks remotely relevant is that on the tool WiFi signal strength became weaker when the above wakeup events started.
Has anyone else had similar issues with random battery drains like this and/or happen to know any workarounds?