yashsingh1/xdaforums huggingface dataset:
[Nexus 4 General] :
Hi all,

I have noted some important things. I was trying to use setcpu to reduce the frequency of the cpu, since it can quickly become hot even if the task doesn't need a lot of power.

In order to find what is the minimal frequency that allows the interface to stay smooth, I have set the maximum to 386MHz and the governor to powersave. Surprise, the interface stays incredibly smooth (i mean really smooth), probably due to the fact that the S4 pro cpu is quad core.

Anyway, back to the default frequency, I have noted this :

- when touching the screen, the cpu minimal frequency moves from 386MHz to 1026MHz during around 4s and then go back to 386MHz.

My first question is : do we all run the same kernel ? Mine is coming from the official Google images, and the two words that get all my attention are "performance" and "prerelease" (gcc). New version coming soon ? Less agressive behavior ? I don't know.

On my screenshots, the kernel information is displayed by CPU Spy, the other one is coming from Android itself.

Why set the minimal frequency so high, considering that the cpu is extremely powerful, the priority of the UI, very high, and the battery, not so big...

Envoyé depuis mon Nexus 4
[Nexus 4 General] jacklebott:
I think you can set the CPU frequency so low and still stay smooth, because all the rendering takes place in the GPU in android 4.2
[Nexus 4 General] :
Hum, this is not really true. Only a part of the UI is rendered by the GPU (you can check, there is an option that shows the elements managed by the GPU). Plus, if the GPU render all the interface, why make the minimal frequency so high when touching the screen ?

Envoyé depuis mon Nexus 4
[Nexus 4 General] jaZzyjeff818:
One thing I noticed is it charges up pretty quickly.
[Nexus 4 General] Nickel Dime Bay:
The build quality of this thing is amazing, i am in love.
[Nexus 4 General] Anubis007:
my wild unscientific guess would be that the poor battery battery performance is related to the poor benchmark scores. i am willing to bet it's a kernel related issue, but we won't know for sure until enough developers get their hands on the device.
[Nexus 4 General] tgyberg:
If only he were a bit more excited! :silly:
[Nexus 4 General] theguitarman94:
haha! The guy is a tech enthusiast. The way he jumped up at the start because he thought his nexus 10 was being delivered lol! Some of the guys at XDA don't like his reviews but with the very limited amount of video reviews of the Nexus 4 I'll take what I can get!
[Nexus 4 General] tgyberg:
I'm with ya! I've watched them all, even the non English stuff! :laugh:
[Nexus 4 General] Disastorm:
I've only been using it for a few hours so far but battery life seems decent for me, althouh I don't actually use the phone actively too much.

However, Is it true that Android 4.2 may be decreasing battery life more than normal? I've seen a whole bunch of articles mentioning that if you search google.
[Nexus 4 General] sotorious:
that is insane stats right there i just need to turn some of those services off just to see what type of battery life i would be getting thats 3 times what i get
[Nexus 4 General] jtroye32:
Yeah, I figure I'll just toggle them when I'll be using them, which is not a lot, so I'll deal with minor inconvenience of toggling. Once we start getting some tweaked kernels and such, I might ease up a bit, or just enjoy the even better battery life.
[Nexus 4 General] Ulver:
I left my phone unplugged during the night to see how good it idled, and it sucked! Went to bed at 82% and woke up 7 hours later at 50%. Android OS was running like crazy. Looks like it never went into a deep sleep. I have no idea why.
[Nexus 4 General] locsplitter:
NO NO NO NO

NEVER DO THIS FOR ANY PHONE EVER

Lithium ion technology DOES NOT work this way.

You WILL destroy your battery if you let it drain completely.

This was a trick for old nickle phone batteries to extend battery capabilities, and should never be used with newer phones.

Source: Learned this the hard way with my SGS2.
[Nexus 4 General] duraeas:
Does a Live Wallpaper still show up as itself in the battery screen? I'm running Nexus 4 Dot Live Wallpaper and feel as if it should be chewing up my battery, but doesn't show up.

Likewise, would appreciate it if someone could make a suggestion for reducing "Mediaserver" usage. I don't have any videos/music loaded on the SD card aside from things saved to Google Music.
[Nexus 4 General] systemf:
So far have gotten about the same life as my galaxy nexus. Yesterday got 3h screen time 1.5h GPS on a 14.5h day before it shut down.

Using WiFi saves battery by quite a bit. Like better than 1% loss per hour on idle, battery line looks flat which is a little better than the gnex. It's when using the cell connection that is worse than the gnex.

Had the maps problem too where it was eating battery at idle. Turned off location reporting which seems to have solved it.
[Nexus 4 General] nyijedi:
I'm not sure exactly what the difference is, but in the location settings under maps, I left location reporting set to update automatically, but unchecked "Report from this device" and maps wake locks seem to be much improved.
[Nexus 4 General] ptesmoke:
No man...

If you run your phone to 0% it does not harm the battery. In lithium your not running the battery to 0volts. There's many protection built-in to prevent over draining a lithium battery.

Only way you'd fully drain one is to short it with a resistor to bleed off the remaining 3.6volts
[Nexus 4 General] manlisten:
Good enough for my needs, but I can't help feeling that something is needlessly eating the battery. Mediaserver seems to be running whenever have the screen on, just not sure what app is using it. My standby performance is pretty good though. Lost ~3% over a 5 hour idle period.

About an hour of streaming music, 30 minutes gaming and the rest web browsing.
[Nexus 4 General] lonz358:
Under volting keeps the phone super cool, mobile data would have it around 100°F browsing the web and using xda

Sent from my Nexus 4
[Nexus 4 General] Younggun123:
I'm having the same issue with the media server. Even more of an issue for me is I don't have a single song, picture, or movie on my phone yet. Only app I can think of that might be using it is YouTube, which I have been using here and there.
[Nexus 4 General] desdelaayuda:
hi....with this metod...my battery starts to work fine...until that only 8 hours with 2 hours of screen..today 9 hours with 3 hours of screnn and 35 per cent yet...sorry for my english
[Nexus 4 General] bastic:
if only battery would be like this all the time...

[/SPOILER]

will see how it will work at work tomorrow where I have carp reception or rather lack of it..
[Nexus 4 General] aceo07:
What were you doing during those 7hrs? Just had the display on idling? I see most of the hours at 384mhz..
[Nexus 4 General] bastic:
around 2-3h web txt etc, rest idle...

wont ever use so many hours of screen time but wanted to test it how long it will go especially as screen should be eating most of battery
[Nexus 4 General] italia0101:
What app is this ?
[Nexus 4 General] marshalex:
Not impressed. Hardly used the phone today, only 42m of screen time, 8h 43m on battery and down to 62%. Dropbox used a bit when uploading some videos and photos but otherwise it's hardly been touched. Had wifi on all day. Google now and maps all off. Must be a bug
[Nexus 4 General] italia0101:
Def sounds like a bug... I'm completely stock, I'm loving the battery .. Check it :
[Nexus 4 General] tomedic:
Overnight (9+ hours) on LTE and lost 4%. Not bad...
[Nexus 4 General] Red Wolf:
with HSPA on the battery is really bad on my nexus 4, but with wifi its really awesome :D

HSPA on I am getting around 8hrs, 2hrs display time hardly. and with wifi I get around 14hrs and same 2hrs display :)
[Nexus 4 General] sidamos77:
Yes, it should be listed, if it is using at least 2%.
[Nexus 4 General] wazka2:
So far I am quite happy with my battery :)
[Nexus 4 General] razball:
I don't get how is everyone getting such amazing battery life I barely can squeeze out 2 he's on screen time and 7 hours of off charged total and that's with juice defender and ram booster and killing apps constantly and most syncs off is there a trick? And I'm not rooted
[Nexus 4 General] nyijedi:
Same here. Battery is great on wifi, but kind of weak on hspa. That msm_hsic_host wake lock really is a lot worse when on hspa compared to wifi. I'm suspicious that that's causing the drain.
[Nexus 4 General] italia0101:
I would try getting rid of both those apps.. Its not always the best thing to constastly kill the apps. They will just reopen

No tricks
[Nexus 4 General] powerwagon:
Yea I think you're doing more harm than good by using those apps. With 2 gigs of ram, there really is no need to kill off apps anyway.
[Nexus 4 General] AlwaysDroid:
Yeah, do not ever use things like task killers. Android has its own ram management and does a fine job at it :)
[Nexus 4 General] nyijedi:
Agreed. Task killers are so éclair ;)
[Nexus 4 General] razball:
Had no idea Lol well both are gone now lol
[Nexus 4 General] golfinggino:
I flashed the matr1x 1.5 kernel last night and pimp my ROM to see if I could get battery life but I didn't use it too much today, I ran it max 1026 MHz in setcpu with lte on to see if the reduced setting would have any effect on the battery life, I am currently at 10 hours 4 minutes on time with 2 hours and 25 mins screen on time with 57 % battery remaining , 35 minutes voice calls some small internet and emails not really a good test but I don't use a phone much on the weekends anymore that is what my 7 android tablets are for !!!
[Nexus 4 General] MaxCarnage:
I haven't had an opportunity to use my phone for a "normal" day yet (work day) but so far I think the battery has been decent. It's not the MAXX or anything but it's gotten me through a day and then some. The only day I had an issue where I thought the battery was going to die before I was done with it was a trip to the Renaissance Festival on Friday; I was using the camera a lot and the signal during the four hour trip and for the four hours we were there was pretty bad (one to two bars) with no wifi or anything and I was at about 49% when I got in the car to leave. Forty-five minutes later and I was at 100% again on the charger. I didn't take any screencaps or anything but honestly, it works for me and that's what matters. :)
[Nexus 4 General] eep2378:
First charge cycle:D

Muffin approved this message.....
[Nexus 4 General] Disastorm:
Does anyone know if 2G + wi-fi is better for battery than HSPA or HSPA+? Just wondering what I should be using at my apartment.
[Nexus 4 General] nyijedi:
I'm pretty sure 2G/3G doesn't make a difference when wifi is on.
[Nexus 4 General] Disastorm:
What I mean is should I turn wi fi on or off for better battery ?
[Nexus 4 General] resynx:
Using wifi will save more battery than being on 3G.
[Nexus 4 General] Disastorm:
Thanks.
[Nexus 4 General] zzelinka:
This is on HSPA+ all day inside my building in Downtown Portland, OR... Stock unlocked and rooted.

Stupid volume button. It was 18 hours off charger...
[Nexus 4 General] Simer03:
Cm10.1 and matrix kernel! Still at 25% and going! Running out of things to do to drain it lol

Sent from my Google Nexus 4
[Nexus 4 General] MattSkeet:
After exchange my 2nd bogus runs a lot cooler and battery is far much better. I'm sure I could squeeze more than 4hrs screen time just don't have that much time in the day to play with it. However, I'm going to work in a minute and I don't have good reception there (friggin hospital :) ) so my battery will probably suck. Will report later ...
[Nexus 4 General] maniAK-:
real happy with battery life getting 2 complete days thats with normal usage watch some video surf some net on data and wifi and listening to some music , i get one days use on my GS3 while having a new phone with new batttery could well help i dont remember my S3 doing so well when its battery was new , i think its the Amoled display that uses more power

anyway real happy with my N4 finally found the phone i was looking for untill 2013 that is :D
[Nexus 4 General] yfbc:
The battery on this phone is pretty inconsistent, I'm pretty sure there are some bugs causing random battery drain.
[Nexus 4 General] ugotproblemz:
How are u guys such great battery??? I see that ur WiFi is always on. but is your 3g on?

In my case I have ****ty reception at work. If I leave my phone on with 3g I lost about 30-40 percent on idol over 11 hours.

But today I turned my 3g off and had WiFi on...and BAM ONLY LOST 11-12% OVER 11 HOURS....
[Nexus 4 General] dwang:
Pretty happy with battery life running faux's kernel.

Can probably squeeze out another hour of screen time with how much battery I have left, but I need to go to bed. Lol
[Nexus 4 General] manlisten:
Insane idle performance. :D

Was at 49% about 7 hours ago. Dropped to 47% over 5 hours, then I loaded a couple of webpages.

Very happy with this performance. I *think* disabling NFC improved things a bit.
[Nexus 4 General] 6i9:
I can confirm that disabling Google Now (by turning off the Location Services master switch) battery life drastically improves! Especially in an idle state.
[Nexus 4 General] PoisonWolf:
Google Now is a HUGE battery drainer. Turn it off if you don't need it.
[Nexus 4 General] Nitroz:
Disabling NFC will help the battery a lot. When NFC is enabled, whenever you put your phone on a surface, the NFC counterpart is searching for something NFC compatable. I've never used NFC in any of my devices, so disabling it comes 2nd nature to me :P
[Nexus 4 General] eep2378:
1) Disable Google Now

2) Disable location access

3) Disable NFC

4) When you have access to Wifi, turn off mobile data, and set your wifi sleep policy to "never"

5) Profit :D

Also disable backup data to google servers help too :)
[Nexus 4 General] razball:
How's the smoothness of matrix kernel?
[Nexus 4 General] stuart0001:
We really shouldn't have to disable these to get a decent battery life. I'm getting less life than my HOX which has all these enabled. Considering the N4 has a larger capacity battery it really is baffling.
[Nexus 4 General] DjeMBeY:
Not bad but now I know is not as good as it should be....

My S3 LTE have the same battery size 2100mAh, bigger screen, older Android version, more power hungry CPU&GPU and still muuuch better battery life....

;)
[Nexus 4 General] PoisonWolf:
Lol. You may as well return to a Nokia 3310 if you're going to disable everything just to get decent battery life. Disabling Google Now should be sufficient.
[Nexus 4 General] manlisten:
So yeah, I'm pretty satisfied.
[Nexus 4 General] LawAce:
+1. My HOX definitely got better battery life.
[Nexus 4 General] blackpaw78:
I love going to my gas station, and paying using the NFC on google wallet, it freaks them out :D
[Nexus 4 General] Girn:
How do you pay with NFC? Do they need a scanner or something
[Nexus 4 General] eep2378:
You can use g wallet to pay at any paypass terminal.

Muffin approved this message.....

---------- Post added at 12:58 PM ---------- Previous post was at 12:54 PM ----------

I'm not talking about " decent" battery life. Disabling just a few things will get you decent. :D my example was for above average battery life (for this device).

Muffin approved this message.....
[Nexus 4 General] alen1901:
Thats not true. Well, partially. It is recommended to not charge phone to full charge(on nexus there is limit, so OK, but you can put charge to 90max), and to plug it in charger when its on 20% or when first notifies you that battery is empty. But, also is recommended to fully discharge and charge your battery once in a while(once in a month, or once in two months).

Sent from SpeedMachine i9023
[Nexus 4 General] MaxCarnage:
Can you cite a source for that information? Literally everything I have read about Lion and Lipo batteries says the opposite; that you should avoid fully-discharging the battery whenever possible.
[Nexus 4 General] alen1901:
You can harm that battery only if you are fully discharging every day for a long time(months). If you discharge it fully once, and charge it, its 1 charge cycle and this battery has 800 charge cycles. My nexus battery has 500 charge cycle. I fully discharged my battery couple of times till now and my battery is too good. Fully discharge makes battery to calibrate fully, so its more precise.

Sent from SpeedMachine i9023
[Nexus 4 General] bassbox:
The electronic in the battery knows when to shutdown to avoid problems caused by deepdraining as it also knows when to stop and say 100% i'm fine.

You can nearly to what you want: Discharge to 1% and fully charge to 100% or from 50% -> 100% or from 20 to 60%

its close to the same for battery lifecycles. It will last as long with a 1->100% charge as it will with 50->100

There is many electronic in the battery wo measures the voltage of every single cell to stay in range of e.g. 3,6 and 4,1 Volt whereas everything is fine

You should only try to avoid to power on the phone several times after it has shutdown due to low battery and reload it as soon as possible after the phone says its empty and shuts down !!

Put the phone charging whenever you want (best >1%) , 20, 40, 60% doesn't matter much at all. And put it off the carger with 20, 60, 80 or 100% whenever you need to. It WON'T harm your battery! (Do what you want, just don't let it drain toooo empty thats the only harmful thing you can do to LiPo)

If we say 1cycle equals to one full charge then only using 50% of a charge would equal to about a half cycle used ! (Yes, thats quite correct! And no there is no memory effect :D only NiCad had memoryeffect due to the Cadmium) But this can vary a lot as i dont know the exact technical specification used in our battery... In most cases partially discharges give longer battery live than full! (You can read about this e.g. here: http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries )

Source: recent lecture
[Nexus 4 General] meanwhile:
Sent from microwave
[Nexus 4 General] Serious_Beans:
Not bad for a first cycle.
[Nexus 4 General] d4mi3n:
So its okay to leave it on a charger all night then?
[Nexus 4 General] alen1901:
Yes, because phone is limiting itself so it doesnt fully charges, preserving battery health.

Sent from SpeedMachine i9023

---------- Post added at 10:08 PM ---------- Previous post was at 10:06 PM ----------

I see only bad battery life here. Its the same like on my nexus s. But, little UV, UC, remove some Google apps and it should be a lot better.

Sent from SpeedMachine i9023
[Nexus 4 General] Mohit12:
Hey. I'd like a favour please.

Can someone do an EDGE vs 3G vs WiFi battery life test?

I'd like to see how much the difference is. I don't mind switching to EDGE for certain periods of time if it really helps my battery life along.

Also, if you're in Canada and can use that LTE service, put in your input. However I know that the signal of LTE is weak so that'll draw more battery power, so this probably won't give accurate a result.
[Nexus 4 General] tpboi:
4 hour screen on time with 1.5 hrs of gaming. Rooted and using Franco's build 5 kernel. Google now NFC disabled. Deleted a few stock Google apps like books and magazine. Wi-Fi always on everything syncing. Still 7% battery when taking the screen shots, overall very satisfied after some tweaks. Ask if you need any advices.
[Nexus 4 General] SammyK300:
I haven't tried edge but on 3g I can get 3 hours screen on over a 10 hour period.

On WiFi I can get well over 5 hours over a 30 hour period.
[Nexus 4 General] alen1901:
I am interested in why awake time is so small. On Jelly bean 4.1.2, if your screen is on, device is awake, so there is blue line for awake the same as screen on. But on Jelly bean 4.2, awake time is so little even if screen is on all the time and using phone. Is that a bug or..?

Sent from SpeedMachine i9023
[Nexus 4 General] lonz358:
Battery has been GREAT for me...way better than my galaxy s2... still 44% left...I deleted some Google apps I don't use, using faux beta 005 kernel on aokp. I also under volted and now the phone never gets hot anymore. ;)
[Nexus 4 General] sungrad:
If it keeps this up I'm heading for over 6 hours screen time...
[Nexus 4 General] Simer03:
I got 5 hours and 20 minutes screen time with Google now enabled but I also froze Google maps and enable it when I want to use it

Sent from my Google Nexus 4
[Nexus 4 General] Girn:
How do you disable/enable Google now? I went through titanium back up and uninstalled Google+ but that's not it
[Nexus 4 General] Ulver:
Turn it off via Google Now settings.
[Nexus 4 General] sungrad:
Of it keeps this up I'm heading for over 6 hours screen time...
[Nexus 4 General] Ulver:
Got the best day in battery so far!
[Nexus 4 General] yellowman82:
Liking some of tge n4 battery stats in here had to show off a bit if tge GN2 :D but today really wasnt that much usage just light moderate few browsing, texting, some phone calls and youtube watching also not sure why none of the apps I used today showed up in the graph :confused:
[Nexus 4 General] EnIXmA:
I am really impressed with the battery life. On 4g lte the whole DAy, got 14 hours standby and 2.5 hours of onscreen with moderate use
[Nexus 4 General] aceo07:
14:49hrs total. 4:18hr display on
[Nexus 4 General] Younggun123:
I just got my best yet. 4:40 screen on. 15:30 total on. I think I would have got quite a bit more but YouTube is not kind to the battery. Over two hours on YouTube. NFC off, Google now off, brightness at about 50%, on WiFi all day long.
[Nexus 4 General] ock:
Wrong thread? ;)
[Nexus 4 General] Mohit12:
Anyone using the N4 with EDGE?

Any idea what the battery life will be with EDGE and not 3G or WiFi?
[Nexus 4 General] InvalidUsername:
Lol wut? I pretty much had my screen on the whole time, and it doesn't show up?? This is right after the 4.2.1 update. Is this an issue for anyone else? I'm going to restart and see if it persists.
[Nexus 4 General] alen1901:
Hahah, Google fixes 1 bug and introduces another? :p

Sent from SpeedMachine i9023
[Nexus 4 General] maniAK-:
how do you disable google now is it the same as google search ?
[Nexus 4 General] playya:
Yes just go into your setting for google search(now) and turn everything off..

Open Google Now then go to Menu - settings- google now(search) and at the top right you should be able to turn it off. I do not have Nexus 4 but this is how I turn mine off and yes it helps greatly with battery life IMHO
[Nexus 4 General] optimiss:
All these great battery times are with the phone connected to wifi. Have any of you tried going all day without it? What kind of scores do you get then?
[Nexus 4 General] Blocoholi:
I've got some weird readings, can anyone tell me why? I'm on 4.2
[Nexus 4 General] yfbc:
+1 this.

I don't always have access to wifi away from home.
[Nexus 4 General] barondebxl:
Not without it but with a lot of hspa+, yes. Still reach 4hours + on screen time. Battery life drains normally from 100% to 50% then it drains slowly, at least for me.
[Nexus 4 General] rockethot:
Android OS has been draining my battery like crazy. Anyone else having this issue?
[Nexus 4 General] keepittidy:
Mine too :(

The android os keep awake is showing 3 hours and the phone has only been Running for 6 hours since last charge.
[Nexus 4 General] optimiss:
Yep, getting it too. It is that damn msm_hsic_host wakelock.
[Nexus 4 General] sungrad:
Just got my best so far, 14:37 up time, 4:53 screen time. That's about an hour of YouTube and 2 hours of Hill Climb, the rest was browsing and XDA.
[Nexus 4 General] jasonwc:
I finally took the suggestions from this thread and disabled Google Now, NFC and automatic location services (location services still works when manually requested in Maps, Navigation) and the difference has been massive. Yesterday, with pretty much the same usage I went from 100% to 15% battery life in 9 hours with about 2 hours of Pandora streaming and 1.5 hours of screen on time. Today, with similar usage and 2 hours of Google Play usage, I was down to 72% in the same period of time. Crazy.