[Sony Xperia XZ1 Compact Questions & Answers] Dean F:
Somewhere earlier this year I started getting a 20% overnight battery drain. On a few nights it didn't drain, but its pretty consistent. I have tried everything listed on this forum..This drain is definitely not caused by any standard settings. I am really hoping somebody with insight into Oreo might have something new I could try. I know xda user Digisteve is going to showup and suggest more things, and that is also not going to work.

Things I've tried.

- using root to disable logd. (saw this as a process in BBS) Still drained.

- Disabling auto-sync of all accounts. Still drained.

- Turning on stamina mode at night. Still drained.

- Removed google play store, google play services framework, and all google aps - and replaced with alternative China app store. - Still drained. Not a play services problem.

- Turning off wifi, all wifi scanning, notifications of wifi networks etc. Still drained.

- Turning off mobile data and wifi - no connectivity at all. Still drained.

- Turned of location in all possible device settings,. Still drained.

- Rooted the device with Janjan method/kernal. Still drained.

- Flashed different regions. Including (Taiwan, my region, Malaysia, Germany, Swiss, HK). Still drained.

- Tried firmware verions , 179 , 205, 235, 270

- Deleting 3rd party apps. Still drained.

- Installing Gsam - checking for consuming apps. No apps listed as cause of the drain.

- Installed greenify. Tried as standard, non-rooted with adb permissions, and fully rooted. Still drained.

- Disabling various packages related to 'carrier services', qualcomm and rcs. Still drained.

- Debloated to the point that the phone had no google apps, no Xperia apps and removed tons of other apps, camera bloat, anon data, etc, all removed. Still drained.

- All built in apps replaced with a 3rd party app, including, sms, contacts, email, keyboard. Still drained.

- Installed Linage OS 15.1 Beta 5. Still drained.

- switched from 3G only to LTE only. both drained equally.. though I have worse single with LTE in my area.

I am hoping there is a better solution than throwing the phone away. Because I am pretty much at that point now. I have spent probably well over 120 hours trying to fix this, and I can't. Its at the point where I need to move on to a new device rather than waste more time.... but there are no small devices on the market now, and also no more classic xperia style devices on the market. Sony does not make the executive, classic 'Xperia' style I fell in love with anymore. I don't do round, heavy, huge phones. Very sad.

UPDATE - AUGUST 14

Now running the latest Customized German 270 firmware.

Still draining 20% per night. Check out the screen shots - clear to see I have almost no apps. No process can be seen as a battery hog in both Gsam and BBS. However Gsam screenshot shows evidence of CPU usage.

UPDATE - SEPTEMBER 13 - FOUND THE PROBLEM

Considering almost nobody had my issue, I assumed my phone must be a dud. Late August I bought a second XZ1 compact. The new phone worked for 1 day, and on the second day drained battery at 15% per night idle drain. Previously I had only tested the sim card by switching 3g,4g and disable mobile data, but never actually removing the sim from the phone. Last 2 nights I replaced my old sim with my gf sim of a different carrier. In the morning I had 99% battery remaining. No Drain!

I then downloaded an app these measures signal strength, and turns out where I sleep at night, there is is less reception. Its not noticeable just looking at the standard signal strength on your home screen, you need to check the more detailed strength in decibel millimps /dbm. I can still get good signal in most areas of my house, but the phone is having to use more power to keep the signal good. I can now reproduce the battery drain on demand. If I sleep with the phone near my bed, I get drain. But if I keep the phone in the living room, no drain. I found that connecting to wifi not a factor, since even if you use wifi for data, the phone was still holding open a connection the the cell tower.

This problem took me months, countless hours, and the expense of buying a completely new phone!!! Now I have 2 XZ1 compacts....arg.... but so happy its solved.

The important point is that if testing sim, good signal, or disabling mobile data, changing 3g 4g isn't enough. Your phone is using more power to maintain good signal.

Thank you to everyone who spend time trying to help me, digestive, proflyer, etc. Thank you guys.