I've replicated what follows from the Telegram Supergroup, as that's no place to collect observations from people using a variety of phones. Hopefully some patterns will emerge that inspire improvements.
I have a Nexus5 and, since 16.04, regularly get over 24hrs from the battery. OTOH I have noticed that there are (still) issues:
- Sometimes it gets to a state that "eats" battery very quickly when not in use. Shutting down (which, in this state often need two tries before the screen goes fully black) and rebooting seems to fix this.
Glad you brought this up. N5 just eats the battery in idle state. Wifi, Data, LTE etc are all off. I tested this matter on Android (stock rom and Pie 9 rom) and the battery didn't drain at all. So, it should be an OS problem. I wrote about that here, https://forums.ubports.com/topic/1958/n5-battery-usage-in-ut-and-in-android
Hope something can be done about this problem. Some apps don't go to sleep correctly, I suppose.