yashsingh1/xdaforums huggingface dataset:
[Nexus 9 General] seanashmore:
No problem, there are some other small changes to default settings, for example I turned off the notification for open WiFi network, enabled developer options by default etc.

If there is anything else you would like to see in the ROM please let me know and I'll see what I can do.
[Nexus 9 General] i9100g user:
Preview 2 elemental x, moderate use
[Nexus 9 General] lilliput222:
Broadband is down here due to heavy rain and it will take couple of days to fix :(
[Nexus 9 General] i9100g user:
Also there is virtually no drain on standby a big difference to L. (As one would expect)

5 hours standby 1% drain
[Nexus 9 General] lilliput222:
My standby battery drain is asum ,, whole night just 1% . i greenified all apps , wifi on , disable all useless Play Services from app MyAndroidTool . wakelock detector stays between 0-2% , 0 right now btw .. Current battery stats 100-59% , 4hrs 52 min SOT in 22 hrs , played candy crush 50 min and some book reading
[Nexus 9 General] i9100g user:
Yea battery life is too good to be true I wonder what the final release of M will do ?
[Nexus 9 General] nyasha1935:
Was hoping if you could include battery percentage on battery icon. Thanks again?
[Nexus 9 General] i9100g user:
Heavy usage (2 hours straight Chromecast stream via a otg-usb and chrome /YouTube rest of sot)

1 day standby

With battery saver on[emoji6]

BTW I have no mods its complete stock preview 2
[Nexus 9 General] lilliput222:
Nice ,, cpu governer tweaked or stock ?
[Nexus 9 General] lilliput222:
Some more new stats Candy crush 50min , youtube 40 min ,, lot of ebook reading
[Nexus 9 General] Domstadt:
ROM?
[Nexus 9 General] sarajonee:
Use third party app to maximize battery life

Like >

play .google .com/store/apps/details?id=com.asw.advacnedbatterysaver
[Nexus 9 General] seanashmore:
New volantis.zip at: https://drive.google.com/open?id=0B...VqUVZkV0doaTlpN2FEWFZPT2x3MkVWTDB6YlBVTDNqTG8

This build shows battery percentage in black until battery is at 15% or less, then it will show it in red. This feature can be turned on/off in a new 'Apathy Settings' screen in the Settings menu. I also added some extra options to the power menu (when you hold in the power button) allowing reboot, airplane mode and changing from vibrate to silent etc.

Just grab the new zip and run the flash-all script again.

Anything else you would like just let me know.

Thanks.
[Nexus 9 General] nyasha1935:
Thanks a lot! My tablet is now cooler than the iPad mini 2 that I have
[Nexus 9 General] lilliput222:
You must open a thread in development section with this rom :):D
[Nexus 9 General] i9100g user:
Governor elementalx (unchanged)
[Nexus 9 General] lilliput222:
Can anyone explain me what is above_highspeed_delay ,, . i set it to 2500 but dont know whats it impact on performance and battery
[Nexus 9 General] Nismo2005:
One Question: where you can see 8h SOT?
[Nexus 9 General] nyasha1935:
Got 7h with his updated rom without adaptive brightness. I set my brightness to 45%. (Tried to share image links first time posting images hope you see it)
[Nexus 9 General] seanashmore:
Cool, the images arent showing up for me but can see the links when i replied to your message now:

https://goo.gl/photos/ophEyfV8Wp1hppu59

https://goo.gl/photos/MiwT2u9U3dwLBcnc6

What kind of usage was this btw?

---------- Post added at 06:37 PM ---------- Previous post was at 06:33 PM ----------

This page seems to have good explanations for different parameters and even their rough effect on battery life:

http://xdaforums.com/showpost.php?p=33161912

Hope it helps. Probably use it myself to tweak my rom.

---------- Post added at 06:41 PM ---------- Previous post was at 06:37 PM ----------

I think they're referring to an old post of mine on this thread:

http://xdaforums.com/showpost.php?p=61706279&postcount=621
[Nexus 9 General] Nismo2005:
Ah okay I got it :)
[Nexus 9 General] nyasha1935:
Mixed heavy usage PDF reading, reddit, YouTube for 3hrs and web browsing. Also flashed DU minimal gapps
[Nexus 9 General] lilliput222:
On an average while doing random things i lose 1% for every 5 minutes when screen is On , Is it good ?
[Nexus 9 General] seanashmore:
What rom are you running? I guess it's decent as if the rate stayed constant you would get 500 minutes (roughly 8 hours) of screen on time that way. Obviously it will fluctuate but as a rough indicator i dont think its a bad thing.
[Nexus 9 General] lilliput222:
i am using Broken Os v2.4 with latest fire-ice kernel
[Nexus 9 General] lilliput222:
Some more new stats ...

Usage . youtubr 1h18 m ,, chrome 25 min , overall gaming 15 m ,, lot of book reading

Stats over 8hrs in 3 days

..Time to try some new rom now
[Nexus 9 General] Locklear308:
Wow, that is terrible... seriously? Why is it that the Ipad just has this outrageous battery life that other OEM's just can't do? Not saying I prefer the ipad, I don't care about crapple. But seriously a high-end tablet like this in 2015 needs to be flying to at least 12 hours of SOT with no trouble. Not barely making 7. Especially in one day
[Nexus 9 General] USBhost:
thats the first day i had my n9

of course its going to be lower lol

my new best is 13h sot
[Nexus 9 General] Locklear308:
Oh phew, thank goodness lol. I was like "Google wtf did you do!?"

What is the norm like?
[Nexus 9 General] USBhost:
about 7-8

but of course if you game your going

to get bad battery!

tegra cpus dont have good battery

to begin with. its always around 7-8 on low to moderate usage.
[Nexus 9 General] ArGyGG:
New nexus 9 problem

Guys I just got my nexus 9 and my battery will stuck 99% while charging don't know if its normal and another issue is the heat to the camera part .I love this tablet so any suggestion or something .Btw I'm running stock 5.1.1
[Nexus 9 General] whatever100:
Based on what I observed, browsing xda on Firefox will deplet the battery in roughly 5 hours.
[Nexus 9 General] whatever100:
Using setcpu to set the governor to conserved, and unchecked "always keep wifi on" made standby battery life much better.

Still nothing I can do for web browsing. Set it to conserved while using Firefox, but the effect isn't that obvious.
[Nexus 9 General] cacarrizales:
Hello everyone! I am new to the forums and this is my first post. Just thought that I would let you know how my battery is doing on my Nexus 9. I got it about three weeks ago off of Amazon. I ordered the WiFi version but instead got WiFi + LTE. So just letting you know that Amazon sellers are actually giving you a more expensive device for cheaper (around $350). Anyways, when I first had it it did not last very long. I gets very hot with web browsing and I've read that that's just the way the tablet is. The battery life would not last more than 5 hours SOT. This is about my fifth charge cycle and the thing is on 89% and I have 1 hr 5min SOT (I am completely stock, not rooted) from using music and Chrome the whole time. For 7 hour nights, the battery only drains 1%, which used to drain 3-5%. My tip to you is if you have a fairly new Nexus 9, let it discharge to about 5% and then charge it at night before bed and then unplug it when you get up in the morning. I did this 3 or 4 times and my Nexus is running stronger with every charge. I will post a picture of my battery usage when it gets low to where I need to charge it.
[Nexus 9 General] cobyman7035:
anyone else on a stock 5.1.1 LTE? hows battery life at 30% brightness stock everything...thx
[Nexus 9 General] Drizzy xS:
Hi I downloaded all the files in your drive account and I got the tablet to boot but it doesn't seem to have the Google apps even though I downloaded them, can you let me know how to get Google apps installed so I can use the tablet please? Thanks

Managed to fix it by installing twrp and installing the gaps that way
[Nexus 9 General] seanashmore:
You need to use TWRP to install the Gapps.

Download Twrp from this link: https://dl.twrp.me/flounder/twrp-2.8.7.0-flounder.img.html

Then, when you have downloaded that. Go to where you have the Gapps file and run: adb push [insert gapps filename here] /sdcard/Download/

Once that has completed (it may look like it's doing nothing for a minute or two), run: adb reboot bootloader.

Then run: fastboot flash recovery twrp-2.8.7.0-flounder.img to flash TWRP over the stock recovery

Once complete, hit the power button to choose 'HBOOT', then choose 'recovey' to reboot into TWRP.

Once TWRP has loaded, choose install and navigate to the gapps file in the Download folder that you transferred earlier and swipe to install it.

If you want to start up as you would with a stock rom i.e entering your google account details etc. you can use TWRP to do a factory reset before you go to 'Reboot->System' to restart into the ROM.

I hope this helps you out.
[Nexus 9 General] Drizzy xS:
That helped thanks, I figured I'd have to use some form of custom recovery
[Nexus 9 General] seanashmore:
No problem, it would be great if there were some other way but were not allowed to include them in the image unfortunately. I've actually updated the from quite a bit since that upload, I'll get the new version up soon.
[Nexus 9 General] rolling_thunder:
I've had my nexus 9 since February, I'm running it stock. I've never gotten more than 5 hours out of the battery, browsing in opera, watching vids on YouTube, chrome casting movies, stuff like that. Honestly, I think I'd have to say after owning it for awhile and wanting to like the device, it kinda sucks and I'm pretty dissappointed. It's not the typical complaints, my buttons are fine, no flex, very little lightbleed, I just feel like it could run, overall, better. More or less the battery life could be better. Just my 2cents.
[Nexus 9 General] lilliput222:
Just root and decrease high-speed freq ,,, battery difference will be night and day
[Nexus 9 General] nyasha1935:
I have been using a different browser from chrome called habit browser that has a ridiculous amount of customizations. Battery life now lasts 8hrs on stock rom with stock kernel and no root. The browser supports about 8 or more active tabs all loading in the background. Will post screenshots when my battery life is at 10%. Habit browser also has adblocking settings that you can edit
[Nexus 9 General] aleandre1974:
Nice, but...

Hi,

I have decided to give it a try, but cannot honestly after one day see any difference in battery life wrt Firefox (BETA) I have been using until now. The browser itself is nice though, having these on-screen control wheels I was missing from the standard Android browser. Would you care sharing your configuration parameters, to see if something you do has a drastic effect on battery life (I have not yet fiddled with the configuration options, a plenty it is true) ??

Thank you very much !
[Nexus 9 General] nyasha1935:
Here is the link

https://drive.google.com/open?id=0BxJVahEO4ey6TERpTGFjQTN5MUU

I wanted to make it stock like chrome. I long press on a link to open in the background
[Nexus 9 General] Nismo2005:
I also installed the habit and I can say there is no battery approvement
[Nexus 9 General] USBhost:
Not my best

Not my best but still good

I used my nexus 9 a lot today

Rebooting playing testing browsing...
[Nexus 9 General] cobyman7035:
im kinda dissapointed in the battery life, im on EelementalX and im underclock to like 1.6ghz using ondemand governor, i dont think i can get 6 hrs SOT just webrowsing

screen brightness is only at 25% too or less
[Nexus 9 General] Macmee:
battery life is completely crap. My SP3 has better and it's running full Windows.
[Nexus 9 General] USBhost:
How so?
[Nexus 9 General] Macmee:
standby time on the nexus is just plain bad. It dies within a few days even if I don't use it at all. I've just reset the device to see if that helps and it does not.
[Nexus 9 General] USBhost:
O! standby time you say...

The nexus 9 was never built for battery. It was for single task performance

If it where built for battery it would have 4-8 cores.
[Nexus 9 General] beno619:
I've been very happy with standby drain. Have you hunted down any apps stopping it from deep sleeping ?
[Nexus 9 General] darkchazz:
The only way I could improve standby time on N9 is by manually turning off wifi before I turn the screen off. Modifying the "Keep wifi on during sleep" option on the other hand doesn't seem to work for me.

This makes the battery graph almost flat during standby..

It is quite weird because I have nothing syncing on the device, yet it has lots of wakelocks if the wifi is on.

Here's hoping the Doze feature in Marshmallow will fix this.
[Nexus 9 General] beno619:
Pretty happy with mine on the latest lollipop build with a few apps greenified.
[Nexus 9 General] cobyman7035:
I've used 40% in 13hrs...SOT 2hrs. 33mins gsam battery pro

Via my NeXus™ 9 LTE on Tapatalk 5.1.1
[Nexus 9 General] darkchazz:
My thoughts on the N9 battery life:

Nvidia wanted so badly to have higher benchmark scores than everyone else, they clocked their SoC too high and let loose their cpu and gpu governors to give more power than what the user needs at a time.

Did you know the GPU boosts up-to the maximum 852 mhz on simple touch events? That's right!

And with a closer observation, the GPU touch-boost clocks depend on how much the battery is charged (Aside from thermals).

With a fully or near-fully charged battery, the boost clock is 852 mhz. It goes down as the battery level goes down.

So you get 756mhz, then 708mhz, then 648mhz, then 540mhz, and so on...

But.... I see absolutely no difference in UI perfomance.. So why this stupid behavior instead of simply using a single low GPU clock to drive the UI ?

Too bad there's no known way to tweak the GPU governor.
[Nexus 9 General] mangomonkey00:
i'm using my tablet with pure nexus and fire ice kernel latest one i have my cpu underclocked to 1530 and gpu at 708 i have currently used 50% of battery with 3hrs of sot and a total of 12hrs on battery i'm using lte too is this normal or am i having a bad battery life also sometime my tablet just freezes although the freezes are normal but it happens like twice or thrice a day and i have to restart it to get thing going is it something related to underclocking
[Nexus 9 General] cobyman7035:
Seems like a bad n9 u got... Shouldn't freeze at all... Maybe the occasional random reboot every week or so is normal
[Nexus 9 General] shamo42:
I can't complain about battery life. It depends a lot on the apps you use IMO. Firefox and Chrome gave me worse battery life.
[Nexus 9 General] Khye:
Battery percentage not consistent.

Hello, my Nexus 9 battery percentage is not consistent.

Example, its 100% fully charged, unplugged and use it for few minutes, the percentage change from 100% to 98% by skipping 99%. This happened all the times, 90% straight to 88% and happened between 100% to 0%.

Another thing is that, when I stop using it, screen off and leave it idle, example 80%, after a few minutes, it will drain to 79%. Every time i stop using it for few minutes, it will drain 1%.

I had tried factory reset, clear cache partition. But it still don't fix. Happened most of the time, even upgraded to Android 6.0.

By the way, my average screen on time is 4.5 hour to 5 hours.

Any solution or is it due to battery defective ?
[Nexus 9 General] kacanghantu:
same happen to me..afaik and if i'm not mistaken,they use blx to prevent us from overcharging..if you want a proper full charge,you can install battery doctor from play store
[Nexus 9 General] Eiad Ajam:
i can't get more than 5-6 hours screen on time ...
[Nexus 9 General] kiru:
Pretty much brand new Nexus 9. Plugged in during update process to Marshmallow and then drained the battery. This is technically its first full recharge cycle. Didn't do much but watch videos and surfed the net.
[Nexus 9 General] pradeepvizz:
Hello guys, i am noticing my Nexus 9 dropping it battery from 100% to 89% on standby. I got my Nexus 9 when Android 6 came out and had upgraded to 6 almost the same day i purchased it and it's been almost a month and i have noticed this behavior from the start. Do you think it's a HW issue? i am not using the charger in the box, but i am using the my old M8's charger. i suppose that won't be much of an issue? Any suggestions?
[Nexus 9 General] jonnyszt:
Try upgrading your nexus 9 and it would make the battery life got a big upgrade and it last me about 2 days or 3 days.
[Nexus 9 General] sheenswizner:
My nexus 9 battery drains when I am browsing or playing games while doing charging as well. Any1 facing this same issue?
[Nexus 9 General] mangomonkey00:
I'm getting this over counted something in battery can anyone tell me what is it?and why it has consumed that much battery?
[Nexus 9 General] rolldroids:
Not when I'm browsing but playing asphalt 8 with USB charging. Then it seems to consume more energy than it can get from the charger. With ac charging I don't have this issue.
[Nexus 9 General] illcat2000:
I can't no matter what I do manage to get decent battery life out of this tablet. All syncing is off brightness all the way down. On WiFi all day

Bluetooth off. Battery just drains and drains what am I missing? I'm on the latest cm13 using elementalx kernel. I haven't tweaked the kernel at all but I don't think I should have to with a tablet. Any suggestions I've tried everything.
[Nexus 9 General] laureanop:
I did two things to tame the wild idle drain, which was anywhere from 13-20℅ a day: stopped syncing Chrome and have the option to turn WiFi off during sleep enabled. My idle drain went down to 6-8% a day!!! Since I don't rely on my tablet for notifications I don't care if they come in or not.

So since 6.0.1 I can go about 4 days with about 4-5 hrs SOT which I consider great for my needs.

Also switching to opera browser has freed up an average of 100 mb of RAM pushing the average free RAM to about 200 mb ( needless to say this improved performance quite a bit)
[Nexus 9 General] laureanop:
I shaved off another 3-4% a day by turning off double tap to wake. So basically after 6.0.1 my daily idle drain is about 4% which is iPad territory. Very happy now.
[Nexus 9 General] Nismo2005:
How did you turn off double tap to wake?
[Nexus 9 General] laureanop:
I don't think it's turned on by default, but it's under display settings.
[Nexus 9 General] Nismo2005:
Ah I got it. Thanks a lot
[Nexus 9 General] Beta1440:
Keep in mind the Elementalx governor is geared towards performance at the expense of battery. Additionally, the Elementalx kernel sets the default maximum frequency to 2.3 Ghz. If you want to get better battery life, I suggest lowering the maximum frequency to 2.1 or even 2.0 Ghz. Additionally you could try switching to the conservative cpu governor.
[Nexus 9 General] Jeltel:
What do I do with these percentages, temperatures and voltages?

Edit: Complete reinstall worked. Now to see if getting root/xposed caused the problem.
[Nexus 9 General] USBhost:
This is what I call sleep
[Nexus 9 General] resrevni:
Can anyone tell me why my battery life is so good?
[Nexus 9 General] Jeltel:
Your battery life isn't better then before, only the percentages is wrong. I had the same problem (only two posts above yours).

It's something to do with the boot.img i guess. Reinstall the stock rom and run SuperSu without the modified boot. It doesn't need it anymore.
[Nexus 9 General] lilliput222:
Broken Os
[Nexus 9 General] xhddlf96:
Sorry wrong
[Nexus 9 General] StuMcBill:
^that doesn't look like a nexus 9.^
[Nexus 9 General] showstopper03:
this is still the nexus 9 thread im reading right???
[Nexus 9 General] xhddlf96:
oh i has Mistakes
[Nexus 9 General] Gormsen:
So I brought mine to the university today to take notes. When I went I had around 90% battery left and 45 minutes of SOT. When I left I had 65% and 3 hours and 9 minutes SOT. I think this is okay, I also did a little browsing on chrome and checked Facebook a couple of times.

I've come to the conclusion that it's mainly chrome or other unoptimized apps that are to blame. Have anybody tried different browsers? What are your experiences with those?

To the pic or it didn't happen guys:

Smashed down on the mighty Nexus 9
[Nexus 9 General] Scotlac:
That's really great battery life and I would be extremely happy with that if I were getting it!
[Nexus 9 General] USBhost:
Are you rooted
[Nexus 9 General] alicepattinson:
This device has a good batt life. More than what users expect.
[Nexus 9 General] pantmunu:
Yes sir. I am.
[Nexus 9 General] USBhost:
Then do this

su

mount -o remount rw /system

mount = you should see system mounted as rw

If you see that then

Retry my guide
[Nexus 9 General] pantmunu:
Hmm. Ok. Its rebooting atm. Lets see if it works this time . If not ill try that.

---------- Post added at 05:35 PM ---------- Previous post was at 05:34 PM ----------

Its working now . Lol . Weird. Prolly i did something stupid. :) THANKS.
[Nexus 9 General] mk92595:
I disabled Chrome and am currently using Chrome Beta. I get about 6.5-7.5 hours of OST
[Nexus 9 General] Gormsen:
Thanks, I'll give it a try. How hot does your device get when browsing chrome?

Smashed down on the mighty Nexus 9
[Nexus 9 General] mk92595:
Gets warm near the camera but nothing horrible. I have a case on so I dont really feel it
[Nexus 9 General] Gormsen:
The reason for me asking is that heat is sign of the CPU working harder than normal. I'll give it a go tomorrow, where I'm counting on my Nexus 9 to give me more than 6 hours of SOT for note taking and other stuff ;)

Smashed down on the mighty Nexus 9
[Nexus 9 General] GoremanX:
One thing I've noticed is that the N9 will happily continue running right up until the battery meter hits 0%. This is a vast improvement over most of my previous devices, which typically turned off at 8-10% remaining on the battery meter. So stopping a test at 15-20% remaining isn't very indicative of real world results in this case.

Also, the battery saver feature seems to really extend that last 5%, at the expense of speed.

Wow, that day-glo "battery saver" orange theme sure is fugly...
[Nexus 9 General] ElArmaSecreta:
My Nexus 9 made it to 7 hours and 20 minutes of SOT, while playing various games, browsing and streaming youtube video's. Do you completeley drain the battery before charging ?
[Nexus 9 General] dtl:
Well,

Mine comes in today and this issue of the battery life is disappointing. I am moving from a Galaxy Note 10.1 2012 version. I will miss the ability to actually write on the tablet but was hoping to gain more useful time with it. If I could get seven hours that would be nice as the 10.1 was 5 ish.

dave
[Nexus 9 General] Braderzf50:
Charged it once since I got it and I've been using it over the past day and a half. I have 30% left now with not bad sot. Hope it gets even better.☺ I've ordered a replacement unit tonight due to screen bleed and a dead pixel. Such a shame because I love this tablet.
[Nexus 9 General] Braderzf50:
Oops forgot the screen stats.
[Nexus 9 General] cmit37:
On my second charge cycle

I have now blocked Chrome and will be using Chrome Beta to see the impact on battery life.fingers crossed.
[Nexus 9 General] GottaStayFly:
not to sound like a defender or anything, but didn't Google say that there was some WiFi issue in lollipop that's causing the massive battery drain? or is that only for the nexus 5?
[Nexus 9 General] cmit37:
It looks like the screen is using less than 20% of the battery for most people that are only getting approximately 5hr of screen time. This would suggest that there is plenty more OS optimisation to be done to reduce the remaining 80% . There is a good chance that a firmware update will bring a significant improvement.

Generally the screen should be using a higher percentage of the battery. I would have expected over 40% for typical use?
[Nexus 9 General] MRobbo80:
I am heading for about 7hrs + ost (3rd charge) 2nd charge was (7.43hrs) browser is chrome.
[Nexus 9 General] cmit37:
What % of the battery is your screen using?