[Nexus 4 Q&A, Help & Troubleshooting] Lamba92:
Hello, :fingers-crossed:

i'm having a lot of troubles with the battery of my Nexus 4. I'll try to explain this strange situation...

Few days ago i noticed a ridicoulous battery drain while i was, as usually, listening to some music with my bluetooth A2DP headset Jabra HALO2. It was something like 1% every less then 1 minute. At first i thought it was due to a recently upgrade to CM10.2M1 (which is a monthly build of Cyanogenmod on 4.3) or due to a 5 minutes fast charge from the 2A charger of Nexus 10 that could have "upset" the battery.

At first i started focusing on the software side problem; i tried CM10.2RC1, CM10.2, stock 4.3, stock 4.4 and now CM11M1, and, while doing all of those wipes, i noticed that not only the discharge was insanely fast, but even the charge! The graph on the setting panel is almost vertical while cahrging, like 3% to 40% in 25 minutes.

But that's not all, sometimes, after rebooting, i noticed a battery level different from the previous boot, so i decided to wait a full discharge and then fully recharge it. I have waited the 0% (not so much time :p) putting the screen always on and the LED flash too, then, i tried few times to turn it on and every time, after the boot screen disappeared it immediately started to turning off due to 0% battery.

Moreover, for being certain, i tried to turn it on in recovery and wait how much time it would take to consume the lasting charge on the battery. Surprisingly, after 30 minutes it was still there! I tried a reboot into system, showing me a 10% remaining battery (WTF:confused:), which discharged to 0% in like 3 minutes. Now i'm waiting the whole night the real discharge in recovery with screen always on, hoping that a full recharge could fix it. I would like to evidence that the phone do not overheat during both charghe and discharge, so i guess the battery itself may be ok.

I'm still not sure if it's a software problem, and i'm worrid if it could be an hardware related issue. Maybe it could have been the charge from the 2A adapter.

I really don't know what to do next. Someone knows how to help me?

Here 2 screenshoots, I wasn't able to upload it normally so here the links:

https://drive.google.com/file/d/0ByucdM-SwPNnMlFUOGU4bXkzaGs/edit?usp=sharing

https://drive.google.com/file/d/0ByucdM-SwPNnZEtXczNuTXhiMGc/edit?usp=sharing

EDIT:

I've done a full discharge until even the full hybernation has been shutted down, but seems that it hasn't solved anything. I've also noticed that in the battery stat is missing the display consumption (WTF?!?). Maybe it's a CM11M1 bug, it happen even to my Nexus 10. Here other shots:

https://drive.google.com/file/d/0ByucdM-SwPNnazVacUNZeEZkUlk/edit?usp=sharing

https://drive.google.com/file/d/0ByucdM-SwPNnRHU2QlJibk5TVVE/edit?usp=sharing

EDIT:

As happened to the N10, after a while the display appear in the stats:

https://drive.google.com/file/d/0ByucdM-SwPNnMEozbzNRVGdzSHc/edit?usp=sharing

EDIT:

I've noticed just now that while I was waiting a real full discharge of the battery the TWRP couldn't show me the battery percentage. Really strange...

[SOLVED]

In summary, the problem was the combination of kernel+ROM. The CM with his kernel on N4 was consuming tons of electrons. I tried Purity+Hellscore, now i reach few days of low usage and one and half of medium usage :)