[Nexus 4 Android Development] :
Just thought I would give everyone an updated experience accounting I had. I recently went back to stock 5.1.1 for a week so that I could take advantage of Google's offer of using Android Pay once before the end of the year to get a free $20 Best Buy gift card. I have now updated back to the latest "Fake nexus rom".

After updating and on first boot, some apps kept trying to open on top of the first boot setup process. After the setup process, I kept getting popups saying "Connect" (the Motorola app semi-required for Moto 360 smartwatch) had crashed. I had to uninstall several apps and then re-install them from the Play Store because they would crash on launch. Those apps, that I can remember, include: Android Wear, Connect, Fandango, Xbox Smartglass. I think a few others crashed as well, but those are the ones I definitively remember. I had to remember to turn on cellular data and enable the use of the correct cellular APN (since this ROM has cellular data turned off by default).

I just got my phone fully charged at 10:38am EST and will try to remember to report back on battery life. Many here have been saying that they have had bad battery life with WiFi turned on so I am going to test that. I am in the US, have the black 16GB version, and am on AT&T with perfect signal as my office building has mini cell tower nodes throughout the building. Going to try to not touch my phone for 1 hour and see how it is and what has consumed battery life. I don't have any background running apps besides Google services.

Edit: So after 1 hour and 11 minutes, looked turned the screen on to see the battery level and it is 99%. The screen turned on once during the time period when I got a text notification. Also, Bluetooth was on the entire time and I have my Moto 360 connected. Sync is also on for additional data. Will try to go another hour and report back again.

Edit 2: Another hour has gone by and the battery is now at 98%. I received no notifications during this past hour and I did not touch the phone at all. Also, probably should have said this before, I have WiFi setup to only remain "Turned on while charging". So for those who are having issues with WiFi yielding major battery drains, maybe that option should be enabled if it isnt already. Under Settings -> WiFi -> (3-dot menu) -> Advanced -> change the Keep WiFi on during sleep option to only when charging. Will test another hour of sitting and not using and report back. I had to turn the screen on and interact with it for about 30 seconds to provide the instructions of how to change the WiFi setting.

Edit 3: Another hour gone by. I received 1 notification from Google Opinion Rewards, interacted with the phone for about 1 minute at the time of receiving the notification. Battery life is now at 96%. Another random detail about my device that may or may not make a difference is I am NOT rooted.

Edit 4: Last update for today. Two hours after my last update, I am at 93% battery life. I received two notifications. 1 email in Gmail that I deleted from the notification and a text message that I replied to. So about another 1 to 2 minutes of screen on time. During the 2 hour period, I did not touch or interact with the phone. The Battery stats screen says that WiFi has accounted for 5% battery use and that Google Services accounted for 1% battery use. Guess that extra 1% is missing or the battery stats screen rounds down. Maybe tomorrow I will run a test with WiFi off the entire day at the office and see what happens. Again, Bluetooth has been on the entire time and connected to my 1st-gen Moto 360.

Edit 5: Sorry for making this post long, but figured I would keep all the details here. After I got my N4 to 100% battery life, I turned WiFi off and unplugged it. It was in my pocket when I was moving around for about 15 minutes and then sat untouched on my desk for 2 hours. Battery life was at 96%. I looked at the Battery stats and it said WiFi accounted for 3% use and nothing else was listed. I have both WiFi and BT set to NOT be able to scan while off. After I woke up the phone, I got an email notification, so at some point it entered Doze mode. Powering down my phone to give it a clean reboot and will run this test again after getting it charged back to 100%. Not sure why WiFi would be the only thing listed as using battery life when it was turned off, but I hope that this new test I am about to start with a fresh reboot will yield a different result.

Edit 6: Think I will call this the last edit. After about 1.5 hours, the battery life is at 97% with WiFi turned off and WiFi scanning not allowed. The Battery stats says 1% for Android OS and 1% for Google Services. Bluetooth was on the entire time. Forgot to mention that I have NFC turned off as well. Not sure how much power that uses though.