Develop Bugs

[REQUEST] Infrared mode patch.

Can a dev please make a patch implementing this app/script/hack. The Inc has a red theme so I may be willing to go with a red display if it truly doubles battery time. I read something about adding an option to the developer app. Being able to turn it on and off would be ideal.
Thank you all in advance,
dL
http://jsharkey.org/blog/2010/07/01/android-surfaceflinger-tricks-for-fun-and-profit/
https://review.source.android.com/#change,15614
http://androidandme.com/2010/07/news/night-vision-mode-could-double-your-androids-battery-life/

I would also be interested in something like this, if it can give me longer battery life.

Ehh if youre really desperate for battery life why not just do the recalibration trick? I'd rather have the battery run out quicker then have the phone look like that anyway.

The thing i don't get about this is they claim it can give your phone double your battery. Wouldn't the only thing this effect is the draw from the screen? I mean we already went from the lcd screens to the amoled screens and they are supposed to use alot less power and i haven't noticed any difference. My screen is only like 5% of my battery draw also....

th3drow said:
The thing i don't get about this is they claim it can give your phone double your battery. Wouldn't the only thing this effect is the draw from the screen? I mean we already went from the lcd screens to the amoled screens and they are supposed to use alot less power and i haven't noticed any difference. My screen is only like 5% of my battery draw also....
Click to expand...
Click to collapse
this is correct. it won't make our batteries last twice as long, but it may reduce the power used by the display by about half. our display is not a battery hog to begin with. AMOLED is more power efficient than lcd 3/4's of the time. the only time AMOLED draws more power is on an all white or mostly white screen. this is why the web browser appears to kill the battery so fast.

th3drow said:
My screen is only like 5% of my battery draw also....
Click to expand...
Click to collapse
I think that's a reporting bug with the stock Incredible ROM, because screen shots from a Nexus One show the screen being far and away the largest power draw. Flashing my Incredible to CyanogenMod also showed the screen as a large power draw (75% or higher). I didn't notice any appreciable difference in battery life either.

check out surface flinger http://jsharkey.org/blog/2010/07/01/android-surfaceflinger-tricks-for-fun-and-profit/
Oops see post above, disregard

I had similar results using the yeti rom. Display was always in the fifties or higher.
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Sent via the XDA Tapatalk App

I'd rather not use my phone at all if I had to use it with that red tint. I understand someone using this to test but why would you want to use this all the time? If you need more battery, go buy a new one. Turning this on defeats the whole purpose of having such a nice phone and screen. It's like buying a V8 and disabling 4 cylinders to save gas.

ludeboy said:
I'd rather not use my phone at all if I had to use it with that red tint. I understand someone using this to test but why would you want to use this all the time? If you need more battery, go buy a new one. Turning this on defeats the whole purpose of having such a nice phone and screen. It's like buying a V8 and disabling 4 cylinders to save gas.
Click to expand...
Click to collapse
I can see how it would be useful to toggle on in certain situations (emergencies, etc). The amber tint didn't seem quite as hard to look at as the red did.

russphil said:
I had similar results using the yeti rom. Display was always in the fifties or higher.
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Sent via the XDA Tapatalk App
Click to expand...
Click to collapse
Yeah, I'm quite sure that number/percentage is a weighted average. That's why "cell standby" appears so high, I think each one of those categories could be duty cycle or total percentage of potential power drain, such as 65ma/120ma= 55%, although it's obvious that the display will be one of the major drains -- it's always "on" unless the screen is fully asleep or the phone is off--let's not forget the backlight, which is totally independent of pixel intensity/color's specific power draw.

I'd like this as well, if only because the lowest brightness is pretty bright to my eyes in complete darkness!

I am really interested in seeing this on the incredible.
I am an amateur astronomer, and the night vision mode would be really nice to have.

We may have AMOLED screens but soon there will be a ton a people with LCD screens... remember the switch because of the screen shortage?
Granted I probably wouldn't use it much... it'd be more of a novelty for me.

rynosaur said:
Yeah, I'm quite sure that number/percentage is a weighted average. That's why "cell standby" appears so high, I think each one of those categories could be duty cycle or total percentage of potential power drain, such as 65ma/120ma= 55%, although it's obvious that the display will be one of the major drains -- it's always "on" unless the screen is fully asleep or the phone is off--let's not forget the backlight, which is totally independent of pixel intensity/color's specific power draw.
Click to expand...
Click to collapse
Backlight? You are aware how OLED technology works right? Unless you're referring to the upcoming batch of LCD Incredibles that hasn't shipped yet (as far as I know), you should go read up...
Sent from my ADR6300 using XDA App

Change colours of Desire Amoled, invert or nw themes! Extrem battery saving possible!

Hi devs,
since i've read that the amoled display needs no or nearly no battery for black, i've thought about how one could change colours of display.
A lot of us are reading newspaper articles, blogs, mails,... on our desire - so why not change colours to read white text on black background? That would change the battery life extremely!
For a first step it would be enough to invert the keyboard and "text input areas". Later maybe new colours in maps and market,...
After this http://jsharkey.org/ it's maybe only a matter of time and batterylife will be much more longer and every desire or nexus user can choose from a few themes (15%,30%,50%,75% less battery usage theme). The great devs of this forum will have much better ideas!
So what do you think about?
Sent from my HTC Desire

I read about this but if its real why HTC or Android dont know this?
Amoled is a highly sensitive technic dont know if it can handle so huge changes...

essentially the request is to re-skin the OSto predominantly black. doesn't seem much of a problem really for a dedicated artiste

This should be too easy U mean if i use Black Theme my Battery Life is Better?
In time i read it i knowed its true i had better Batter Life with Defrost 1.6 because i used Nextheme on it Now i usen the white Theme and Battery Life isnt as good as before ....
hmmm

xtcislove said:
This should be too easy U mean if i use Black Theme my Battery Life is Better?
In time i read it i knowed its true i had better Batter Life with Defrost 1.6 because i used Nextheme on it Now i usen the white Theme and Battery Life isnt as good as before ....
hmmm
Click to expand...
Click to collapse
I use DeFrost 1.8 with Black TaskBar mod.
I can promise you that you'll see a difference less than a 1% removing the back taskbar.
But, inverting webpages and other stuff would be a huge gain thou.

The red and green filters seem potentially the most useful to me - red, because they are (as proven in his tests) the lowest power diodes in an LED display, and the green because you genuinely get 800x480 in pure green, so text ought to be sharper/more readable.
I'm not sure if using the display with one of these filters on a regular basis would make a noticeable difference to the screen, causing the red or green pixels to fade before the others (although I suspect this would be an issue even when displaying a constant white as I seem to recall blue pixels on OLED displays have a much shorter life than the others?) - however, I'm not really certain whether fade or burn-in on an OLED display is really going to be a huge issue within the lifespan of the phone anyway....

Just like GPS status app in night mode, more apps should support "night mode".
Would be so cool if we can be able to control it with a switch to turn it on and off.

brianius said:
Hi devs,
That would change the battery life extremely!
batterylife will be much more longer and every desire or nexus user can choose from a few themes (15%,30%,50%,75% less battery usage theme).
Click to expand...
Click to collapse
This is about the biggest BS i've read in a long time. Out of all the things that consume power, 'Display' is about 10% (look at your battery usage stats, mine is at 7%). So, you want to go through all this hassle to save maybe 50% of 10%, so you win 5%? Even the non-scientific test had a gain of 6% battry per hour, but you would have to use the screen the whole hour to achieve this.

pwhooftman said:
This is about the biggest BS i've read in a long time. Out of all the things that consume power, 'Display' is about 10% (look at your battery usage stats, mine is at 7%). So, you want to go through all this hassle to save maybe 50% of 10%, so you win 5%? Even the non-scientific test had a gain of 6% battry per hour, but you would have to use the screen the whole hour to achieve this.
But wait a minute, i have a even better idea! Turn off the screen while playing music, and you'll never run out of battery! Ever!
Click to expand...
Click to collapse
Yeah and you rely on the infos of android? When you update to FroYo, Display takes up to 50% of power...so...yeah, those numbers don't tell us anything.
But I would NEVER EVER change the display like THAT just to have better batterylife...that's a bit ridiculous imho.
It would be better if someone finds a way to calibrate the display properly.

I use the desire often for listening to music with gsm+wifi on. Make a simple test:
- music + gsm + wifi + display off/night screen and
- music + gsm + wifi + display on with light sensor and bright wallpaper
There will be a big difference not only 5-10%. When we could "only" save 15-25% it would be a big thing!
Very good idea to make colour themes similar to gps status app btw!
Think about chatting on icq or sms with girlfriend,... with green/red/blue... text on black background, would be make a difference
If this could stop my battery from draining - why not?
Sent from my HTC Desire

Eggcake said:
Yeah and you rely on the infos of android? When you update to FroYo, Display takes up to 50% of power...so...yeah, those numbers don't tell us anything.
But I would NEVER EVER change the display like THAT just to have better batterylife...that's a bit ridiculous imho.
It would be better if someone finds a way to calibrate the display properly.
Click to expand...
Click to collapse
50%?
LOL. Mine takes up about 5-10%. Don't know what you've got runnin' on yours.
My Froyo is dark as it is. Maybe I could squeeze another 1-2% battery time by making all icons darker, but whats the fun in that?
As I said previously. Being able to invert websites from black on white, to white on black would be one of the worthwhile things. Or invert apps that have a light theme. Don't have any of those myself thou.

Daelyn said:
50%?
LOL. Mine takes up about 5-10%. Don't know what you've got runnin' on yours.
My Froyo is dark as it is. Maybe I could squeeze another 1-2% battery time by making all icons darker, but whats the fun in that?
As I said previously. Being able to invert websites from black on white, to white on black would be one of the worthwhile things. Or invert apps that have a light theme. Don't have any of those myself thou.
Click to expand...
Click to collapse
Read in the different threads, most people report 40%< with FroYo.
What I wanna say: the info you get from those percentages is useless. The display takes (of course it depends how much you use your phone) MUCH more than 5% when it's on.
Just test it. You can enable the option in Settings -> Applications -> Dev. Leave your phone 1 hour with enabled display and after that 1 hour with disabled. 5% my ass...

Hopefully the modification made on the following link will be possible for the Desire as well...
http://jsharkey.org/blog/2010/07/01/android-surfaceflinger-tricks-for-fun-and-profit/

why don't you remove your display from your desire? so it would consume no power...

I've changed my background to a dark one and installed Handcent app to get black background while reading and messing with text messages and I must admit that I get at least 4 hours of more juice from my battery. Usually it lasted 24-28 hours. I get more 4 hours on average now.
Sent from my HTC Desire using XDA App

* DeFrost 1.7c / black taskbar mod.
* Unneeded tasks killed
* Waited for 5 min for essential software to refresh.
* 100% charged before test.
Battery usage/average based on SysFS battery output: lowest to highest
Code:
Screen off (standby): 117mA
Screen home screen / brightness off: 172 mA
Screen home screen / brightness med: 196 mA
Screen home screen / brightness full: 232 mA
Normal usage, auto brightness: 200-240mA
Screen 100% red: 244 mA
Screen 100% green: 302 mA
Screen brightness off / CPU 100% load: 305 mA
Screen 100% blue: 354 mA
Screen 100% white: 476 mA
My phone lasts about 3 days depending on usage (65-75 hrs).
My Display usage (according to menu) usually is on the range of 2-5%
Normal battery drain in the range of 175-250mA at average brightness and usage.
Making it darker than I already have, maybe I could squeeze out 25mA (50mA feels impossible).
I would guesstimate I could gain another 30-60min, if I'm very lucky.

Seems to me you'd have to use a monochrome dark red theme for the least power drawn.
Actually sounds rather cool
Sent from my Desire using XDA App

WhiT3Kr0w said:
I've changed my background to a dark one and installed Handcent app to get black background while reading and messing with text messages and I must admit that I get at least 4 hours of more juice from my battery. Usually it lasted 24-28 hours. I get more 4 hours on average now.
Sent from my HTC Desire using XDA App
Click to expand...
Click to collapse
considering your average usage varies 4 hours each lifespan (24-28 hours as you claim), how can you say you get 4 more hours usage?
where's the logic in that lol?
(lol, I totally agree with you the darker colors use more power, hence saving battery - I just had to point this out lol)

troedi said:
why don't you remove your display from your desire? so it would consume no power...
Click to expand...
Click to collapse
Because then i wouldn't be able to watch Hannah montana

WhiT3Kr0w said:
I've changed my background to a dark one and installed Handcent app to get black background while reading and messing with text messages and I must admit that I get at least 4 hours of more juice from my battery. Usually it lasted 24-28 hours. I get more 4 hours on average now.
Sent from my HTC Desire using XDA App
Click to expand...
Click to collapse
Thanks a lot! Will install handcent app now. I do have a plain black background (black dot as jpg) and think I have around 2h more at least, but to be sure I'll have to test it.
It's really frustrating if you come from a 5-7 day magic/mt3g to a 7-12h desire. Maybe I should root only for a battery reset
Sent from my HTC Desire

Screen brightness and battery life.

I have been searching for 20 mins and can't find an answer (first time using the app so may have missed something).
I was wondering if anyone had any data on brightness % and power usage. People seem to go to great lenghts to change the brightness levels but I remember something on last years Google dev. con. videos on YouTube that said it didn't make as much difference as originally thought. (i can't find the video either lol. Bad search day here).
Sent from my HTC Desire using XDA App

The biggest improvement in battery life (IMO) comes from setcpu. I also keep my screen at 40% which I suppose helps some. I've got a Mugen extended life battery and setcpu set at around 537 max (on demand) with the screen off. I get 2 days out of my battery... And I use my phone a lot.

k3an said:
The biggest improvement in battery life (IMO) comes from setcpu.
Click to expand...
Click to collapse
Lol, now uninstall it, set smartass governor and see how meaningless that app really is.
madmaveric said:
I was wondering if anyone had any data on brightness % and power usage.
Click to expand...
Click to collapse
The bad thing is that on Sense roms, I have yet to see brightness going lower than 30%, even in pitch dark. Aosp does far better job as long as brightness is concerned. Setting it at low value is not an option for me either as it renders your phone unusable in direct sunlight.

/accidental double post

erklat said:
Lol, now uninstall it, set smartass governor and see how meaningless that app really is.
Click to expand...
Click to collapse
How to set governor when i don't have an app which can do this any more?
Swyped from my HTC Desire using XDA App

MatDrOiD said:
How to set governor when i don't have an app which can do this any more?
Swyped from my HTC Desire using XDA App
Click to expand...
Click to collapse
Every rom has it listed under its changelog, usually it is smartass for sense roms. It isn't by accident either, some have reported lag waking the phone up. I haven't across almost all roms available, and even if I did I'd still prefer 20% less performance over 20% less battery life.

madmaveric said:
I have been searching for 20 mins and can't find an answer (first time using the app so may have missed something).
I was wondering if anyone had any data on brightness % and power usage. People seem to go to great lenghts to change the brightness levels but I remember something on last years Google dev. con. videos on YouTube that said it didn't make as much difference as originally thought. (i can't find the video either lol. Bad search day here).
Sent from my HTC Desire using XDA App
Click to expand...
Click to collapse
Why dont u test it wiht currentWidget or so? Okay, i did it:
0% -> 125mA
25% -> 150mA
100%-> 280mA
So what do we learn? Brightness and/or Screen has a big impact and probalby most people here trying kernel tweaks and whatever to improve the battery dont understand math.
MatDrOiD said:
How to set governor when i don't have an app which can do this any more?
Click to expand...
Click to collapse
You can just use the Terminal... its linux after all.

x潮騒x said:
Why dont u test it wiht currentWidget or so? Okay, i did it:
0% -> 125mA
25% -> 150mA
100%-> 280mA
So what do we learn? Brightness and/or Screen has a big impact and probalby most people here trying kernel tweaks and whatever to improve the battery dont understand math.
You can just use the Terminal... its linux after all.
Click to expand...
Click to collapse
Agree. Just check the battery usage, you will get the idea.
On mine, display usually uses 40% - 60%, with data always on.

Apologies for the late reply. lost internet connection for a week then forgot I posted it
Thanks for the replies guys. I eventually found the video, took ages lol
(youtube.com/watch?v=OUemfrKe65c).
According to what they say in this the screen actually doesn't account for that much of the total battery usage (mainly due to the screen being off most of the day) overall given everything else using battery.
i.e. coming up with a way to keep the device asleep for longer when turned off would completely out strip any adjustment to the screen brightness in terms of battery life.
So things like lower cpu when in standby can be really good but only when not getting data transfer (as this needs to be done very quickly as its expensive).
As adjusting screen brightness is easy to do I think that is why so much time is spent on this. In reality though it seems like it is only going to give a limited battery life increase.

But if you put low cpu, the cpu needs more time at low to do the same that a fast cpu, thats why the setcpu apps its a bit crap. I think that set low the brightness of the screen save more battery than putting the set cpu really low... (just my two cents)

I leave the brightness on my phone to around 30% for better battery, and i can see it ok in the daytime. I have recently had it up at 100% and noticed how quick my battery goes dead.

Gsanez said:
But if you put low cpu, the cpu needs more time at low to do the same that a fast cpu, thats why the setcpu apps its a bit crap. I think that set low the brightness of the screen save more battery than putting the set cpu really low... (just my two cents)
Click to expand...
Click to collapse
Very true.
I guess ideally you want the CPU low when its not doing anything and high when doing data transfers etc (to speed up the high current draw activities).
I guess a good app would be one that puts the phone in airplane mode for 90% of the time when inactive. Only coming out once every so often to check for text/data etc. I can see that giving better returns than anything else. from what was said in the video a phone in standby doing nothing would apparently last nine days (as apposed to one normally). Given this data I guess its possible to double the battery life with this kind of app.
I may have to have a go at writing one

SMF_12 said:
I leave the brightness on my phone to around 30% for better battery, and i can see it ok in the daytime. I have recently had it up at 100% and noticed how quick my battery goes dead.
Click to expand...
Click to collapse
I agree that turning the brightness down makes sense and saves battery. It just seems a disproportionate amount of time people spend over brightness vs better ways of extending battery life.
I guess the rewards also depend on the amount of time you use the phone as the more you use it, the better reward from the screen and the less from the standby solutions

Max Screen Brightness Battery Run Down: Test Results!

Hello all,
I've been suspicious of the power draw of the screen on the GNex, and so decided to figure out how much a difference brightness made.
This is to test the difference extreme brightness settings make to battery run times. Including text, browsing or having radios on will dilute the results. I'm only interested in the efficiency of the screen and its supporting infrastructure people!
Here's my testing method.
1. Charge phone to 100% using a PCs USB charging (should give a more full charge than the wall adapters quick charge, I think, otherwise no harm done). Leave attached to USB cable
2. Switch the phone into Airplane mode.
3. Switch off Auto Brightness and turn brightness to Max
4. Restart Phone. Leave it to settle for a few mins
5. Fire up "Just Pictures" and the image "TotalWhite.jpg" (attached). No other photos in the folder where it sits.
6. Disconnect USB charging
7. Start Slide show. Record the start time.
8. Every now and then (about 45 mins to an hour and bit) I quickly pop into settings and take a sneak look at charge level - don't want to get caught out!
9. Resume Slide Show.
10. Wait until the phone switches off, which is less than 2% charge​
Now, it's not a quick process as I'm going from 100% Batt until auto shut off. So I'll be updating this post in installments. Today is the Max Daddy Full Brightness White image!
Full Brightness, White Image:
100% 00h00m
85% 00h39m
60% 01h53m
35% 03h08m
0% 05h00m​
Pretty good I think!
Battery status stated that Screen was 91% and Android System was 9%. Screen on time was the same as the run time. It never went off.
There's a heavy set of disclaimers to go with this though: The White Image isn't quite the right aspect for it to display across the full amount. Check out the image "White Full The Phone.jpg" - it's pretty close though. Just Pictures isn't so full screen that it takes over the Android buttons - Anyone know a 100% full screen picture view BTW? Between the point where it comes up with "Please connect your charger" (15%) and 6% it said that message over the White image and partly dimmed the screen - I'm at work and was in the middle of something when it happened.
Minimum Brightness, Black Image:
100% 00h00m
85% 01h26m
82% 02h05m
18% 08h54m
0% 10h47m​
Battery status stated that Screen was 85% and Android System was 16%. Yes, that's 101%, but there you go... Screen on time was within a minute of the run time.
Again, some notes on the testing: From the "connect your charger" point (i think 15%) to 8 % it had the message on the screen. Just before the end I accidently touched the screen and ended the slide show for up to 15 minutes and the screen went off. Switched it back on and it was at 2%. It then lasted something like 30 mins before auto shutdown. Black isn't Black! check out my the photo "Black Dim The Phone.jpg" - ignore the strange black specs, it was 1 seconds exposure at F1.4, with the camera facing down - think there's some crap in my camera body/lens.
Minimum Brightness, White Image:
100% 00h00m
0% 10h20m​
Again, Battery status stated that Screen was 85% and Android System was 16%. That's the same as when I ran it on Min Brightness, Black Image...
Maximum Brightness, Black Image:
100% 00h00m
0% 10h52m​
Battery status stated that Screen was 90% and Android System was 11% (again 101% also probably due to some rounding going on). Screen was on 100% of the time, Android OS was awake for 100% of the time, CPU time 23 Seconds
Overview:
Maximum Brightness White Image: 5h00m
Maximum Brightness Black Image: 10h52m
Minimum Brightness White Image: 10h20m
Minimum Brightness Black Image: 10h47m
Well, well, what's happened here? Maximum brightness with a black image scored the longest run time - unbelievable, right? Yeah pretty much: On the minimum brightness black run I did check the battery stats a few times. The black image run had a greater Android OS drain (11% vs 9%) compared to the white image. As I switch the phone off in preparation for the test it's possible I inadvertantly bump charged the phone. In addition to this, I was trusting the phone a lot more in this, the final test and didn't check the battery status near the end, so perhaps drawing a lower current happily sitting there doing nothing other than displaying a blank image the phone managed to syphon off the last dregs of power, as opposed to spending CPU time with me rummaging through the settings screens for battery stats. Let's put it all down to being in the margin of error and consider the Black images to have the same run times, despite the Android buttons blazing away on Bright (but they aren't many pixels).
Conclusion:
Back to my original concern, that the screen was abusing the battery more than necessary. I'm mostly happy with the outcome - Black bright and dim screens draw substantially less than a very bright white screen on this phone, as it should. It's surprising to see that on dimmest setting the white screen got so close to the run time of the black screens. It's producing a lot more light than either black screen. It's drawing c5% more power than the black screens, but I would expect a lot more. I'm guessing that the circuitry to run the Screen and the small amount of power used to make the "Black" OLEDs glow dark dark grey draws only a little less than the white screen.
And that's a shame. I wanted to run an app such as "Off-Clock" to have a clock on the screen like the Nokia N8 used to do, but i'm thinking this will eat the battery in 10 hours 20 minutes. Only one way to know for sure....
My initial annoyance that Black never is actually Black whilst the screen has faded. Many of you good folks have pointed out (and after more Googling) that all OLED screens have this, although the reason for it isn't clear. It's either to ease the transition from black to lit by having the LED at the threshold already, power seeping into the circuit somewhere or something else. Who knows, maybe we'd get better run times if the screen was on full brightness but used PWM or a fast strobe to show a dimmer image!
That's all folks, discuss, and remember - continue testing...

I love you for doing this. Please don't stop.

Some tidbits: The whole phone was warm, front and back. Not scary hot, but like a nice hand warmer. The screen shots were actually done after I connected the charger and restarted the phone. You'll see the graph shows it starting to charge, but all the stats are for when it was last on the battery - in the test.

Thanks for testing this.
How do you define min brightness?
The black color, do you mean #000000 hex color code?
That will last days!
Sent from my Nexus S using XDA App

excellent thread that's it's about screen time on no idle time

gogol said:
Thanks for testing this.
How do you define min brightness?
The black color, do you mean #000000 hex color code?
Click to expand...
Click to collapse
Not too scientifically - I made it black in MS Paint. It's a JPG. I tried it out in portrait and landscape on full brightness and I can't see the edges of anything on the screen, so it's as black as the rest of the black in Gallery. If you have a better way, then I'd gladly take a 16x10 black image if you think it is more black.
Min brightness will be using the brightness slider in settings. I haven't rooted the phone so don't see any way to get it lower. I tried the app "Dimmer" but it's the same brightness as far as I can tell as min setting. Also I figured the min setting was relevant to more users than something they can't easily get to (or probably see on screen!).
Do you have any suggestions? I want to root, but my home PC can't see my GNex. It's being a pig about it and I haven't got Broadband ATM... Hope to root as soon as I can.

Just a quick input. If you just show a picture for 5h how does the cpu perfom in this time? Isn't it really bored?
In addition if you switch it to air plane mode it doesn't use any power for transmitting a signal. I know this point is really tricky due to the fact that not everybody receives the same signal strength.
Isn't there a more realistic way to test it? Like a combination of stability test and the white picture?
Or a slide show with specific pictures, for example a picture with lots of green, one with a lot of red, one with blue, one with white and one with black?
I really like the idea but if we could create something like a standard which tries to simulate real usage that would be great for future testings.
So that we could say something like:
Galaxy Nexus with Vanilla Android -> 5h with XDA battery benchmark
Galaxy Nexus with CyanogenMod 9 -> 5.3h with XDA battery benchmark
We could compare different settings and see how good they perform based on a "standardized" procedure.
Hmm is this probably a bit too much?

I like the idea of a standardized battery procedure for XDA.
Only thing is, i feel like just web browsing would give a better idea, mostly white website sites and it uses data and CPU/GPU still to give real world usage results.

Nebucatnetzer said:
Isn't there a more realistic way to test it? Like a combination of stability test and the white picture?
Or a slide show with specific pictures, for example a picture with lots of green, one with a lot of red, one with blue, one with white and one with black?
I really like the idea but if we could create something like a standard which tries to simulate real usage that would be great for future testings.
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Hi Nebucatnetzer, I get what you're going for and think it would be a great test. My original goal was just to see how much of a drain the screen was. I used it on Airplane mode as I do not want to have any other drains diluting the result. As you say, signal strength changes, and so this becomes an uncontrollable variable. I'm only showing a white image as it's the most uniform full power test of the screen I can think of. As the display is RGBG, maybe a greenish white would draw more, but I can live without that - web pages are predominantly Plain White and Text in ICS is white.
I actually think that 9%/10% drain for Android OS may be a bit high for 5 hours. I think Just Pictures may be the cause for it as it does every minute change the image in a slide show... to itself...

pewpewbangbang said:
I like the idea of a standardized battery procedure for XDA.
Only thing is, i feel like just web browsing would give a better idea, mostly white website sites and it uses data and CPU/GPU still to give real world usage results.
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It was one of the things which annoyed me the most here. Everyone says he has the ultimate tweak to save juice but you never really could measure it.
We probably have to skip the data part due to asimilar signal strengths.
And it would be really cool if we could find something which works for every phone.

pewpewbangbang said:
i feel like just web browsing would give a better idea, mostly white website sites and it uses data and CPU/GPU still to give real world usage results.
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Hi! I'm not trying to do a real world test as such. I'm trying to find out how much of an impact a white screen has compared to a black screen. I have a suspicion that the Black screen will draw more than it should do. I've been using my phone on Auto Brightness and at night, min brightness and have found the screen is caning the battery. There's more to the screen than the AMOLED - there's also a MIPI Framebuffer controller, plus whatever interfaces that has to the rest of the phone.
I'm aware that ICS and the other internals of this phone seem quite efficient, so any savings I can make on the screen (which really does suck the juice) should translate into big run time gains... Surely...Right?
If it turns out that there's very little different in battery life between a Black screen and a white screen, then I'll crank up the brightness to revel in its retina destroying beauty. If there is a difference, then i'll stick with my black homescreen background....

The black screen shouldn't draw any power virtually as long as its truly black. SAMOLED functions where black doesn't turn the pixel on so no energy is used. I think the black test has been done by someone, you can probably google it.

We we aren't criticizing you specific we just hijacked the thread a bit sorry for that .

Nebucatnetzer said:
We probably have to skip the data part due to asimilar signal strengths.
And it would be really cool if we could find something which works for every phone.
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would be good if someone could make a benchmarking program which pumps out signals in a set pattern on all devices at set frequencies and at a few different power levels. It would't need to wait for a response from any cells or WiFi routers, just talk to itself and only itself. Maybe this would need too low level access to work, below root.
Then you'd have your predictable Radio part of the test. If it's even possible.

pewpewbangbang said:
The black screen shouldn't draw any power virtually as long as its truly black. SAMOLED functions where black doesn't turn the pixel on so no energy is used. I think the black test has been done by someone, you can probably google it.
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Well, I hope a black screen will draw considerably less. We shall see. Or it will be a revelation... Or everyone will get to witness me finding out that my phone is defective. Hahaha... oh...god I hope not...
I may run the black test overnight. It should last the night. If it doesn't I can always hook it up and check the last "On Battery" status as I did earlier. Then I can run two tests tomorrow!

Davidsmonkeyroost said:
would be good if someone could make a benchmarking program which pumps out signals in a set pattern on all devices at set frequencies and at a few different power levels. It would't need to wait for a response from any cells or WiFi routers, just talk to itself and only itself. Maybe this would need too low level access to work, below route.
Then you'd have your predictable Radio part of the test. If it's even possible.
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This sounds more than difficult. Not a clue how one could do this.
As soon as I have my device I'll probably start a thread where we can think about a standardized (what a stupid word) battery test.
Curios how your second test goes.

Instead of the black screen test, amoled screen, you could do a white background with black text. This would give better overall real world stats.
Text generator http://www.lipsum.com/feed/html

Second test - black on lowest brightness - is underway.
Some bad news, which you may already know about: Black isn't black. It's very dark, but the phone isnt switching all the pixels off. I took a photo with my SLR in the dark but can't upload at the moment, will upload tomorrow.
Just took a sneaky look at the stats.
85% 01h26
The draw is 85% screen and 16% Android OS. Yeah, I know they don't add up, but that's what it says.
So far, the draw is higher than I expected for lowest settings with a black image. Odd. The phone isn't warm though, like when the screen was showing a white, max brightness image. It's cold.
Sure hope it doesn't start moaning about running flat whilst i'm asleep...

Last check before I go to sleep: 82% 02h05
Same split of 85% screen and 16% Android OS. Who says percentages have to add up to 100?

Davidsmonkeyroost said:
Last check before I go to sleep: 82% 02h05
Same split of 85% screen and 16% Android OS. Who says percentages have to add up to 100?
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Most likely rounding bug.

Question Question about your guys battery life accurately app.

I'm wondering what kinda battery life you get on the zfold3. When I opened youtube with the big screen on my accusatory app says it dr omegle ains 32%/hr does anyone else have any knowledge of if this is normal rate or high? I got it on ebay so I'm trying to make sure that everything is running as expected.
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Also if I open lifeafter and play it while fast charging the back of the phone gets really realty hot! Think it was in the 120-130° range xender and screen goes really dim. Anyone else experience this on any slightly more demanding games?

When I watch videos on YouTube with the Fold open I have the same behavior as you, I reduced this by forcing the refresh to 48hz on the videos. For games I don't know, however it consumes when open.

Use manual brightness control and keep below 50% Display brightness sucks a lot of battery.
Using dark mode and wallpaper helps too.
Black pixels use no power... darker ones use a lot less.

Once the OS learns your usage patterns, you should experience much better battery life. That usually take around a month or 2.

iceepyon said:
Once the OS learns your usage patterns, you should experience much better battery life. That usually take around a month or 2.
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Lol, it never worked that I saw. Google global power management and it's tarded buckets will also cause erratic behaviors that can't be resolved unless you turn it off.
Hand optimizing is better, harder to do... but it works.