The settings allow you to lower the resolution. I lowered the resolution to 2340 x 1080 and I don't really notice anything different.... Would this increase battery life? If so, how much?
It will definitely increase battery life.
How much will it increase depends on your usage and your apps installed. It should at max give you 10% increase.
id3alistic said:
Would this increase battery life? If so, how much?
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It is well and widely known that lowering resolution won't give you increased battery life. At all
Ah thanks. I come from an xperia z3 so been using FHD screens only. I was interested in the XZ1 compact back then and one of the key points from reviewers is that the lower screen resolution(720p) saved a lot more battery vs the XZ1 at 1080p.
id3alistic said:
Ah thanks. I come from an xperia z3 so been using FHD screens only. I was interested in the XZ1 compact back then and one of the key points from reviewers is that the lower screen resolution(720p) saved a lot more battery vs the XZ1 at 1080p.
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I think the misconception is lowering the screen resolution vs a device that maxes out at a lower resolution. Maybe it makes a difference for OLEDs...but for LCD screens, all if the pixels are still illuminated, so there's not much difference there.
AarSyl said:
I think the misconception is lowering the screen resolution vs a device that maxes out at a lower resolution. Maybe it makes a difference for OLEDs...but for LCD screens, all if the pixels are still illuminated, so there's not much difference there.
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Sounds convincing and makes sense. I wonder why they'd allow it on this device though?
20degrees said:
Sounds convincing and makes sense. I wonder why they'd allow it on this device though?
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Because Samsung's can do it.
Nothing but hype for the misinformed and ill-advised.
[Dopey voice]"Bruh...look what my phone can do to save battery life. Can yours?" [/Dopey voice]
Using lower resolutions use less power bc they use less gpu computational power. Youre not saving anything really from the screen itself. Think of it this way does your computer/laptop use more power running resource intensive applications or running idle?
id3alistic said:
Ah thanks. I come from an xperia z3 so been using FHD screens only. I was interested in the XZ1 compact back then and one of the key points from reviewers is that the lower screen resolution(720p) saved a lot more battery vs the XZ1 at 1080p.
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As one said here it's from misinformed people.
id3alistic said:
XZ1 compact back then and one of the key points from reviewers is that the lower screen resolution(720p) saved.
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Not that the resolution that saved power. If Sony could put their 3840x2160 resolution display into 4.3" size of XZ1 compact it still would run longer on battery than any 6.5" sized phone from similar battery even with 720p display. Because it's sheer size of screen that saves battery, not the resolution. 4.3" vs 6.5" is hefty difference. One needs more light to make 6.5" display emit light than to make 4.3" one hence one need more power.
Think about it this way, if resolution would matter then XZ Premium and XZ2 Premium would drain their batteries in a matter of minutes with 3840x2160 res displays. Right? But they work almost as long as say Galaxy S9 Plus or Note 8.
---------- Post added at 07:58 PM ---------- Previous post was at 07:52 PM ----------
Nirrik said:
Think of it this way does your computer/laptop use more power running resource intensive applications or running idle?
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It not works like that. When your phone renders picture in 720p or 1080p it doesn't do it sitting idle. It still consumes power when rendering picture 60 times a sec. And its GPU still runs at 200MHz, maybe it needs like 230 or 250MHz for rendering picture in 1440p but is 250MHz vs 200 MHz a huge difference? I doubt it
It's not like 1440 picture rendering needs full GPU power but 720p or 1080p can be powered by idle GPU. Never was, never will. Ask devs in http://forum.xda-developers.com/android/software-hacking if in doubt
In reality ability to pick your resolution for battery life is a gimmick and doesn't really do anything.
There were no proofs that phones live longer from same charge when it's resolution lowered. Maybe it works for constant gaming, like playing games in 720p on a 1440p screen will bump battery life. But in other cases no
Taking only power consumption from the display alone, there is no different between HD, FHQ, QHD. The different is that if a game or any apps(or even system app itselfs) runs at HD, it will need less graphic computational power than running at QHD (once again, its not about the drainage from the display, its from GPU).
romeokk said:
The different is that if a game or any apps(or even system app itselfs) runs at HD, it will need less graphic computational power than running at QHD (once again, its not about the drainage from the display, its from GPU).
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in reality, it's bull****. learn how GPU works. Try to ask Google devs if you don't know. They do habitate here, at XDA
It's not like it renders something and then goes to sleep turning cores off as CPU does. Instead GPU renders frame 60 times a sec and uses 203MHz either your resolution is 720p or 1080p. It can't lower frequency to 100MHz magically because it's not designed that way. So it consumes as much power working at 203MHz either rendering 720p frames or rendering 1080p frames.
Hence no battery economy achieved
Billy Madison said:
in reality, it's bull****. learn how GPU works. Try to ask Google devs if you don't know. They do habitate here, at XDA
It's not like it renders something and then goes to sleep turning cores off as CPU does. Instead GPU renders frame 60 times a sec and uses 203MHz either your resolution is 720p or 1080p. It can't lower frequency to 100MHz magically because it's not designed that way. So it consumes as much power working at 203MHz either rendering 720p frames or rendering 1080p frames.
Hence no battery economy achieved
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See this:
https://www.google.co.th/url?sa=t&s...FjADegQIBRAB&usg=AOvVaw3qEXVbk4h0XmHcDhhRUR1P
Related
Hey guys!
I just wanted to know if scaling down the screen resolution has any impact on the battery life. All of you who have scaled it down, is there any significant improvement in the battery life?
Sent from my LG-D855 using xda premium
There is an battery improvement but some Apps look horrible with This solution. I am back to 1440p and give a f**k about these 1 or 2 hours.
Der CaRl said:
There is an battery improvement but some Apps look horrible with This solution. I am back to 1440p and give a f**k about these 1 or 2 hours.
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Is that 1-2 hours of SOT, or just usage?
This would all depend on the way you use your phone.
A. If you're a heavy user, (games & movies n stuff) then lower resolutions would benifit tons.
B. If you're a light user, (texts & emails n stuff) then the higher resolutions are very efficent.
There is a common misconception going around about this screen requiring alot of power.
The screen isn't what is draining the device so bad, it's the gpu powering the immense amount of pixels that is causing the power drain.
Now taking that into consideration, there is 3 things to keep in mind.
1. You're still lighting up 3,686,400 mini lightbulbs (aka pixels) no matter what resolution you run at.
2. Lower resolutions = less power draw from the gpu, mostly when the gpu is under higher loads.
3. The gpu doesn't require much power while under lighter loads
So to sum it up
Higher resolution + Very graphic intensive = Heavy power draw from the gpu
Lower resolution + Very graphic intensive = Medium power draw from the gpu
Higher resolution + Not graphic intensive = Low power draw from the gpu
Lower resolution + Not graphic intensive = Low power draw from the gpu
As you can see, under lighter loads 2560x1440 is extremly efficent and preferable by myself, but under heavier loads (games and stuff) 1920x1080 is far more power efficent on the gpu (if your games will even run), once we get a custom kernel for our phones a slight gpu underclock would be MUCH more effective than lowering your resolution.
All this talk of lowering the resolution to save power is rubbish, it doesn't work. Its just a placebo.
By far the biggest cause of drain on the battery from the screen is the backlight, not the resolution. Changing it to a lower resolution doesnt actually change anything, the GPU isnt even trying even at 1440P, it never scales past the second step (330MHz) in 2D. The only thing stopping the GPU from being able to display 4K or even 8K is the bandwidth, not the GPUs power. 2D is effortless for the GPU.
If you reduce the resolution to 1080P the GPU has to rescale that image to 1440P in order to fill the screen (the actual screen resolution is fixed and cannot be changed). All this does is add an extra layer of processing and costs you processor cycles.
In games this changes somewhat, but the effect isnt as big as some like to think. The GPU is still memory bandwidth limited in 3D even at 1440P, not power limited. To prove the point in Basemark X the G3 scores higher than the N5 and almost as high as the M8 and S5, despite having double the pixels.
I bought it for the resolution.. I'm not turning it down.. Otherwise I would have just bought an S5 Or a freeking iphone lmfao
---------- Post added at 08:32 PM ---------- Previous post was at 08:30 PM ----------
At 47% now 10hr usage 2hr SOT.... ESTIMATED 8HRS LEFT..
I don't see much different between the qHD and 1080p HD display. the only matter is to heat up the phone and waste of battery capacity.
keaheng said:
I don't see much different between the qHD and 1080p HD display. the only matter is to heat up the phone and waste of battery capacity.
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Really? Text looks much better and zooming in on just about anything looks better.
Nothing compares to 4k video either.
5 to 6 hours screen time with 4k and I've not had any overheating issues. I keep my screen on auto.
Sent from my LG-D851 using XDA Free mobile app
keaheng said:
I don't see much different between the qHD and 1080p HD display. the only matter is to heat up the phone and waste of battery capacity.
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QHD does neither heat up the phone or use more battery. This changing the resolution thing is a myth. The screen is a fixed 1440P, that cannot be changed, if you 'force' the phone to render in 1080P all that happens is that the GPU then scales it back up to 1440P anyway in order to fill the screen.
Really getting tired of seeing these kinda posts now...
Richieboy67 said:
Nothing compares to 4k video either.
5 to 6 hours screen time with 4k and I've not had any overheating issues. I keep my screen on auto.
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The G3 does not have a 4K resolution/display.
Pfeffernuss said:
The G3 does not have a 4K resolution/display.
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He means playing back 4k video.
Especially with root now becoming available, I started giving this more thought:
If someone wanted to do that, would running a lower resolution be an option, to perhaps extend your battery life?
The screen is QHD, 1440x2560. To minimize scaling issues with a fixed-pixel-location screen like an LCD, you could go down to HD, 720x1280. Now the graphics hardware is dealing with 1/4 as many pixels. It won't look as good, granted, but lets say the user accepts that trade-off.
Is this even possible? If so, do you think it could help battery life?
I don't have experience with this on phones. But on a computer, you can certainly lower your display resolution, even if using an LCD. It will look fuzzy at a non-native resolution, but perhaps that's less of an issue here, with the pixels being so small by comparison. And if you were gaming on the PC, lowering the resolution would allow higher framerates, assuming you were limited by your graphics card, not your CPU. I've admittedly never thought about it from a power-use perspective, but it seems reasonable that, if keeping the framerate the same, running a lower resolution would require less power for the PC.
My Galaxy S3 was 720x1280, admittedly on a smaller 4.8" screen, but I thought it looked fine. If using a lower screen resolution could, say, add 20% to my G4's SOT, I would be interested in that.
I believe this is what changing the DPI is for. This can be done via apps, or changing the value in the build.prop I think. Pushing less pixels on to the screen will definitely increase battery life. There's a threshold though, and depending on which G4 variant you have (whether it's branded by a carrier, etc.) you may want to research on what a safe number might be. I think some AT&T G4 user reported bootloops after changing the DPI to <530 or something. It looks like the camera doesn't get affected by the DPI change too, which is a definite good sign.
I'm waiting to see how the battery life holds up right now with root mode now being enabled in Greenify. If I can't squeeze more than 5 hours SoT while at a certain brightness and using BT, I'll consider changing the DPI.
This is not going to improve battery life in the slightest. You might be running a lower resolution but all the pixels are stilled turned on. The lower tax on the GPU is negligible.
kyle1867 said:
This is not going to improve battery life in the slightest. You might be running a lower resolution but all the pixels are stilled turned on. The lower tax on the GPU is negligible.
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Agreed. This was done on the G3 and batter life was not changed, only game performance improved as you are pushing graphics at 1080p instead of 1440p.
AhsanU said:
I believe this is what changing the DPI is for. This can be done via apps, or changing the value in the build.prop I think. Pushing less pixels on to the screen will definitely increase battery life. There's a threshold though, and depending on which G4 variant you have (whether it's branded by a carrier, etc.) you may want to research on what a safe number might be. I think some AT&T G4 user reported bootloops after changing the DPI to <530 or something. It looks like the camera doesn't get affected by the DPI change too, which is a definite good sign.
I'm waiting to see how the battery life holds up right now with root mode now being enabled in Greenify. If I can't squeeze more than 5 hours SoT while at a certain brightness and using BT, I'll consider changing the DPI.
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I believe that that's wrong, specially if you set it to numbers lower than stock.
I found a way to change the resolution
https://forum.xda-developers.com/galaxy-s5/general/tool-change-phone-resolution-dpi-root-t3582863
Follow this thread, it's so simple and works perfectly!! on LG G4 818p
Honor 8 Pro is an incredible device, which ticks all the boxes. But since it has a 2k display and a v8 engine in it, it chunks on the 4k battery pretty quickly.
If there is some way, we could lower the resolution to 1080 similar to that on S8 and S8+, I think the battery life will almost double!
Inputs?!
aKp1 said:
Honor 8 Pro is an incredible device, which ticks all the boxes. But since it has a 2k display and a v8 engine in it, it chunks on the 4k battery pretty quickly.
If there is some way, we could lower the resolution to 1080 similar to that on S8 and S8+, I think the battery life will almost double!
Inputs?!
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You can there is option in battery section when needed it automatically lower the resolution !!!
We actually don't know when it gets activated. It would be better if the user is given better control of the resolution! Like to lock the display on 1080 to preserve battery and then to switch the display to 2k while playing HD games or watching VR
Charging time more
aKp1 said:
We actually don't know when it gets activated. It would be better if the user is given better control of the resolution! Like to lock the display on 1080 to preserve battery and then to switch the display to 2k while playing HD games or watching VR
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Is Battery Charging take more time, when screen resolution is reduced?
CRNair said:
Is Battery Charging take more time, when screen resolution is reduced?
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It saves battery instead.
Sent from my Honor 8 using XDA Labs
nil.d said:
You can there is option in battery section when needed it automatically lower the resolution !!!
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like others have mentioned, ideally, we want something we can manually control. like what is found on many other phones with 2K screen... users can manually select between 2k, 1080p and even 720p.
right now, the one under the battery/ power savings... we don't even know when it gets activated... or if it works (coz honestly, i can't tell any diff between 1080p and 2K on such small screen).
Hi,
Although there is a option to lower screen resolution to reduce battery consumption, we don't know when it exactly kicks into play or if it does at all. I suspect it only reduces the strength of the pixels.
We have raised this query in the recent meeting which was held in Chennai. They took it with a nod, not sure if it will be implemented. We did point out as to how S8 and S8+ does it.
amulbaby said:
Hi,
Although there is a option to lower screen resolution to reduce battery consumption, we don't know when it exactly kicks into play or if it does at all. I suspect it only reduces the strength of the pixels.
We have raised this query in the recent meeting which was held in Chennai. They took it with a nod, not sure if it will be implemented. We did point out as to how S8 and S8+ does it.
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Take a screenshot before and after enabling the option to lower screen res, you'll ses the difference between the resolution of both screenshots
PalakMi said:
Take a screenshot before and after enabling the option to lower screen res, you'll ses the difference between the resolution of both screenshots
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No. You won't see it.
Sent from my Honor 8 using XDA Labs
adriansticoid said:
No. You won't see it.
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I meant when you look in the info (details) of the screenshot
adriansticoid said:
No. You won't see it.
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We will see the difference bro. The lose of pixels
gopinaidu77 said:
We will see the difference bro. The lose of pixels
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Didn't see mine.
Sent from my Honor 8 using XDA Labs
adriansticoid said:
Didn't see mine.
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You will see when an app which sucks too much battery , during that the pixel will be decreased.
PPSSPP needs this...
Current emui 5.1 low res option are not decrease resolution to 1080p I think. Its just reduce the pixels a bit and automatically activated only on power hungry apps. Logically if change resolution at least your screen will flicker a bit. Dont worry upcoming emui 8 will have option to truly change your resolution either 2k, 1080p and even 720p. I think its coming to our phone in January.
Sent from my Honor 8 Pro using XDA Labs
Does lowering screen resolution from 2k to 1080p even save that much battery power?
DrGreenway said:
Does lowering screen resolution from 2k to 1080p even save that much battery power?
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Battery not very much affected, but gaming got better performance if in 1080p.
Sent from my Honor 8 Pro using XDA Labs
I have went back and forth with the 3 different resolution settings. If I look hard I can tell a little difference. At HD it is actually a little less sharp then my LG G5. Do we have any idea of the draw backs of the highest resolution? How much less battery life. Does it affect smoothness. I'll try different setting myself but was just wondering if anybody knew already.
I'm in the process of trying out the higher resolution too. I'll report back my real world use findings.
Sent from my SM-G965U1 using Tapatalk
Does use a bit more power BUT a lot more RAM
I haven't measured battery use (and it would be hard to have exactly the same test conditions anyway), but I haven't noticed any real difference between FHD and WQHD in normal use. I also don't see a whole lot of difference in sharpness or image quality, but maybe someone with younger eyes than me will see a difference.
Testing max resolution for a few days now, no major battery life impact so far. No lag either.
I've been happy with the battery on max as well. At the end of the day, with almost 4 hours screen time, my battery was still 40% yesterday. LTE most of the day, some wifi.
The difference between 1480x720 HD+ and 2220x1080 FHD+ is around 20 minutes battery time over the course of the entire day I believe. Then with 2960x1440 WQHD+ you're probably looking at losing 40 minutes of battery throughout the day. And overall, each step up uses more RAM, which is expected.
In terms of a difference, I can't really tell the real difference between 720p and WQHD+ ... I mean, the screen is small already, it's a phone. It isn't like you're stretch the resolution over a Monitor or TV where you can clearly tell the difference.
I believe WQHD+ is just slightly sharper. The big difference is if you were to use a VR Headset since the screen would be very close to your face and magnified.. this is when I would recommend using WQHD+ ... FHD+ 1080p is fine for daily use and I doubt you would be able to have a noticeable battery drain.
It's truely a topic of Battery Life & Lower Temps / vs. / "Visual Fidelity" & Higher Temps. I believe using WQHD+ over the course of a year would have a considerable but not horrible wear on the battery lifespan however, considering hardware isn't impervious to aging.
I've played with both resolutions but haven't noticed a difference neither.