Moto X with AMOLED

i read somewhere before the barometer only meant to help to lock GPS faster.
let me start by saying nexus 4 battery is not the best. but if you practice leaving your phone charging over night, every night, you should have no problem.

i typically only charge the phone once every 2 nights because i barely used 50% battery everyday. my usage and preferences has a lot to do with it:

1. have wifi at home and office - phone save more juice when on wifi
2. have no facebook, wasapp, twitter installed - i use web and google plus
3. undervolt my phone to around -175.

IMO, most battery related issue are due to wakelock in the phone. the 2100mAh is not big by today's standard, but if you leave your phone in air plane mode, off screen, it could last 1 months!

Well, the idea is, if you can let your phone truly "sleep", your phone can last very long.

Unfortunately, most app went out of the way to try to work harder for you. This is especially true for social media app that need to keep you updated to the seconds. They end up waking your phone too regularly. Say 1 app, wake up every 30 minutes, check if there is any new messages for 1 sec, if nothing, go back to sleep. 1 sec in 30 minutes is not that bad right? Well, it turn out that, that 1 sec of waking up, may "echo" other to start busy-body and start checking things. other app (such as radio) will continue to check if signal is okay for another 5 minutes while the CPU is awake.

now, what if, there are 5 of such app, that wake your phone for 1 sec every 30 minutes? you get the idea.

so, enter the Project Volta!

Android L will have better battery life due to Project Volta. Google identify those issues, and is now pushing for developer to use "JobScheduler" API to push for more battery efficiency.

What it will do? Every app now should use JobScheduler to do background stuff. Instead of waking up based on each app, the OS will now consolidate all request and do it in 1 shot. Wake up 1 sec, do everything as fast as possible, and go back to sleep.

You are right. That will only be effective if every app participate. Good guy google will "eat their own dog food" (their term) and start using this in all their app. So, a Nexus 4, running only Google stuff in L release, you should see something like 30% better battery life (some already tested it in the preview). But as soon as you start putting your other favorite app, if they not using JobScheduler, the efficiency may decrease.

See for yourself



And 1 last thing, will you see a better SoT with L release? May be not. SoT may not be best to measure a phone battery life... AMOLED will always win. *wink*

Anyone know how much does it cost to replace the power button and volume button in LG service center?

There's no more warranty on the phone.

Very nice explanation. So it will be useless if others app dev don't join in.

Android L port for Nexus 4 is ready on xda.

not useless. at least the OS will be more power efficient. it only take 1 bad app to drain your battery. nothing is changed. good thing that they now include a more efficient Battery Historian that may allow you to identify the culprit and take the necessary action. 
i'll never run something like this in my nexus 4 

Hope google won't remove some feature on nexus 4 though. Remember google remove features of KitKat on nexus 4 such as the transparency and others

Who is getting L release? Based on L preview source code Google published, the following device has new "L preview" build, which mean, they are working on getting L release to work on these devices. 

Nexus 7 and variant:

device/asus/deb

device/asus/flo

device/asus/grouper

device/asus/tilapia

Nexus 5:

device/lge/hammerhead

Nexus 4:

device/lge/mako

Nexus 10:

device/samsung/manta

Android SDK emulator:

device/generic/goldfish

Not in the list:

Galaxy Nexus - Maguro / Tuna

Nexus S - Soju / Crespo

So, as you can see, L is coming to Nexus 4 

Your power button issue alright already r ?

Didn't. Haven't found any people who know how to repair...    But since flashed from Purity Rom to Andriod L, the sensitivity had gotten better... 

send to LG SC lar...

Didn't. Haven't found any people who know how to repair...    But since flashed from Purity Rom to Andriod L, the sensitivity had gotten better... 

Yalo, sent to LG SC , within 10 mins settle
eventhough might need to pay if pass warranty period