Yup, you read that right, lol. I'm going to install the app that downscales the screen resolution but I want to go lower then 720p if possible, for maximum power saving.
I'll be installing Linage OS 11 over the weekend.
I use the phone for GPS/Waze and to make calls. I've always hated the fact that it was full HD as I know from using 720p phones that there is no visible difference at all! Most importantly, I want to save battery life as the screen is constantly on for navigation.
What is the lowest resolution it can support without getting distorted? its a 5.1" screen so odd screen size. Would 480 x 800 work? If so, what DPI would that be?
Thanks!
480 X 854 is what I'm using for some games.
Any lower and you will have black bars around the screen.
Do note that not all apps downscale well. I also considered using the device in a permanent state of low resolution, but some apps simply did not look good.
Also, I'm not really sure if there is any big battery gain from this; I simply did it for the performance gain in games.
Thanks for the reply.
Theoretically wouldn't it be using double the CPU (thus more battery) to generate double the pixels at all times?
NokiaBricks said:
Thanks for the reply.
Theoretically wouldn't it be using double the CPU (thus more battery) to generate double the pixels at all times?
Click to expand...
Click to collapse
By that logic, my OnePlus 5 should have double the battery life of the S8, because it has half resolution.
In reality they are fairly close in regards to battery life. Or so reviewers say. Battery drain tests also show the flagships not that far apart.
Most power is consumed by the screen itself, not the CPU.
Sorry I meant using double the CPU/SoC in the processing of pixels, not double battery usage.
Example, to process all information at 1080p the SoC will use 10% of its power to process it, however at less then 720p it would use 5%? In theory anyway.
I think.... Lol.
NokiaBricks said:
Sorry I meant using double the CPU/SoC in the processing of pixels, not double battery usage.
Example, to process all information at 1080p the SoC will use 10% of its power to process it, however at less then 720p it would use 5%? In theory anyway.
I think.... Lol.
Click to expand...
Click to collapse
As I said, the screen itself uses the most battery. Doesn't matter if it's 4K or HD.
Yes, higher resolution requires more processing power, but it's negligible.
You might as well reduce the CPU frequency to about 1 GHz and you will have the same result.
It won't make a huge impact on the battery life. Not the one you expect at least.
Or you can simply test it yourself. The app I'm using is called Screen Shift.
See if
Related
You can overclock n1 only to 1.190ghz, while desire hd 1.9ghz and the htc desire Z (G2) 2.0ghz. Does N1 has to old cpu?
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Sent via the XDA Tapatalk App with my Sexy Nexy
Yes. 1st Gen snapdragon
Sent from my Nexus One using XDA App
if you want to OC you N1 go and OC you Desktop is the best choice
Why would you wanna over clock your phone? I have my N1 clocked @ 691 and works really fast with the MIUI rom and battery performance is better than stock. I'm not a fan of custom rom & rooting but I been pretty pleased so far. overclocking the nexus one will drain your battery like crazy plus the 1st Gen of snapdragons weren't as good with graphics as the A4chips and humming birds.
i have mine underclocked too and it works fine. try going a step further and underclocking it to like 422 when it's sleeping/standby. it'll help your battery
josemedina1983 said:
Why would you wanna over clock your phone? I have my N1 clocked @ 691 and works really fast with the MIUI rom and battery performance is better than stock. I'm not a fan of custom rom & rooting but I been pretty pleased so far. overclocking the nexus one will drain your battery like crazy plus the 1st Gen of snapdragons weren't as good with graphics as the A4chips and humming birds.
Click to expand...
Click to collapse
The connection between clockspeed and power consumption is not as strong as you think. But without a doubt it has an influence. Much more important is the voltage. If you "undervolt" the Nexus One CPU you can even get better battery live with higher clockspeed.
And if you use a tool to change the clockspeed depending on the situation (display on/off, battery % left, workload) and undervolt the cpu you can safe A LOT of juice.
With Wildmonks kernel, MIUI and SetCPU I get a much better lifetime than ever before even though my Nexus runs at 1152MHz.
Actually, the frequency makes a BIG difference in power consumption. Think of it this way - each clock causes changes propagating in transistors, which are the actual power draw. More clocks = more changes = more power drawn. As easy as that.
So, having 10% higher frequency and 10% lower voltage compensates each other.
Nexus has examples that overclock to 1.5GHz when overvolted, like Desire Z and Desire HD (both of those have to be overvolted to go up stable from 1.2GHz). Most of Nexus Ones fail when overclocking and don't reach higher than 1.2GHz, but it might be not because of the CPU, but because of other devices on system board.
Generally, it is only when you change the voltage (which is required to stabilize the higher frequency) that you see noticeable differences in battery life.
Jack_R1 said:
Actually, the frequency makes a BIG difference in power consumption. Think of it this way - each clock causes changes propagating in transistors, which are the actual power draw. More clocks = more changes = more power drawn. As easy as that.
So, having 10% higher frequency and 10% lower voltage compensates each other.
Nexus has examples that overclock to 1.5GHz when overvolted, like Desire Z and Desire HD (both of those have to be overvolted to go up stable from 1.2GHz). Most of Nexus Ones fail when overclocking and don't reach higher than 1.2GHz, but it might be not because of the CPU, but because of other devices on system board.
Click to expand...
Click to collapse
willverduzco said:
Generally, it is only when you change the voltage (which is required to stabilize the higher frequency) that you see noticeable differences in battery life.
Click to expand...
Click to collapse
Ok, some additions required.
Leakage is also dependent on power, and the dependency graph isn't linear - and starts breaking upwards at some point, usually being a tad above the max designed voltage.
Going down in voltage makes leakage change approximately linear, and doesn't affect nearly as much as going up.
Overclocking will draw power just as I noted above - exactly with the same percentage difference - only when the clock is reaching the overclocked area, which happens only when you're playing games or doing CPU-intensive tasks.
Undervolting will affect leakage, which happens 100% of the time.
So yes, when running in dynamically scaled environment, undervolting has more effect than overclocking. On desktop PC, running the same clock frequency constantly, the effect is the same.
Very True. And I wasn't saying that overclocking, while at the same voltage, didn't draw ANY more power... I just am trying to say that (for example in this graph) overclocking only has a small effect on power draw until you actually change the voltage. In that same example, going from 3.4 to 3.8 GHz only adds about 6% current draw while at the same vCore, while going up a similar amount in clock speed.
I'd even wager to say that if you're slightly under-volted and as heavily overclocked as you can go at that given voltage, you'll save some trivial amount of power versus stock because of the fact that voltage affects power draw significantly more than clock speed. I would also wager that if you are at an overclocked speed and are at stock voltage, the amount of current and power draw will be almost indistinguishable to the end user, since things like display will almost always use much more power if the display is on for any appreciable amount of time.
Jack_R1 said:
Ok, some additions required.
Leakage is also dependent on power, and the dependency graph isn't linear - and starts breaking upwards at some point, usually being a tad above the max designed voltage.
Going down in voltage makes leakage change approximately linear, and doesn't affect nearly as much as going up.
Overclocking will draw power just as I noted above - exactly with the same percentage difference - only when the clock is reaching the overclocked area, which happens only when you're playing games or doing CPU-intensive tasks.
Undervolting will affect leakage, which happens 100% of the time.
So yes, when running in dynamically scaled environment, undervolting has more effect than overclocking. On desktop PC, running the same clock frequency constantly, the effect is the same.
Click to expand...
Click to collapse
Jack_R1 said:
Actually, the frequency makes a BIG difference in power consumption. Think of it this way - each clock causes changes propagating in transistors, which are the actual power draw. More clocks = more changes = more power drawn. As easy as that.
So, having 10% higher frequency and 10% lower voltage compensates each other
Click to expand...
Click to collapse
I wouldn't call 10% more peak power consumption big if you take in account that the cpu is only running at the max clock speed a very small amount of time. 90% of the time the device is sleeping anyway and even if it's not you barely need the max clock speed. But if you do you will recognize the difference.
On the other side the reduced voltaged can safe you power all the time.
willverduzco said:
I'd even wager to say that if you're slightly under-volted and as heavily overclocked as you can go at that given voltage, you'll save some trivial amount of power versus stock because of the fact that voltage affects power draw significantly more than clock speed. I would also wager that if you are at an overclocked speed and are at stock voltage, the amount of current and power draw will be almost indistinguishable to the end user, since things like display will almost always use much more power if the display is on for any appreciable amount of time.
Click to expand...
Click to collapse
That's exactly what I experienced.
Pommes_Schranke said:
I wouldn't call 10% more peak power consumption big if you take in account that the cpu is only running at the max clock speed a very small amount of time. 90% of the time the device is sleeping anyway and even if it's not you barely need the max clock speed. But if you do you will recognize the difference.
On the other side the reduced voltaged can safe you power all the time.
Click to expand...
Click to collapse
Yes, you're right, and that's why I corrected myself in my second post. I totally forgot about the frequency scaling.
Off topic, but this is why I love XDA. Rational debate over a subject by intelligent people, where there usually isn't flaming. Thanks added to the two of your posts.
Just wondering if the screen is the major battery draw like battery stats show or if the CPU uses the most and if under volting makes a difference.
Sent from my Nexus 7 using Tapatalk 2
maybe a little,
#1 battery drainer is screen brightness...
Personally I don't think so. Just my opinion tho I'm no expert.
Sent from my Nexus 4 using Tapatalk 2
The power dissipated by a chip is calculated by C*V²*f (V = voltage, f = frequency)
So undervolting will lower the power consumption a bit, but not much in comparison to the screen. Real life difference will be minimal.
Undervolting the 1.3Ghz step from 1.075v to 1v will theoretically lower the power consumption at that step by 15%. But the tablet spends most of its time in the lower cpu steps, where undervolting much is not that simple to accomplish. Don't expect huge differences.
no
I think it does a bit plus it reduces the heat a bit .
Sent from my Nexus 7 using xda premium
The big battery eater on the nexus7 is the screen, not the cpu. You will save way more juice by setting your screen to not be maximum brightness than you will by hacking up the kernel and undervolting.
Think I've read somewhere you may save 3% or so, the real saving is the reduction in temperature
Sent via TCP/IP
I can give a similar general consensus as the others. On smaller devices like my old evo 4G, Undervolting, especially at the lower end of the frequency chart, made a very noticeable improvement, but on a tablet device or device with a larger screen, the quantitative difference quickly dissipates. Undervolting may still help a decent bit in standby time (which I'd argue tablets spend in than phones) but screen on will make only a minimal change.
spankmaster said:
I can give a similar general consensus as the others. On smaller devices like my old evo 4G, Undervolting, especially at the lower end of the frequency chart, made a very noticeable improvement, but on a tablet device or device with a larger screen, the quantitative difference quickly dissipates. Undervolting may still help a decent bit in standby time (which I'd argue tablets spend in than phones) but screen on will make only a minimal change.
Click to expand...
Click to collapse
Actually there is no saving while in standby; the cpu goes into the deep sleep state which already uses very little power. While I can't say I've seen battery life improvements from undervolting, it sure keeps the device cooler.
Sent from my SGH-I777 using xda premium
Please, does turning off power saving decrease the performance of the note 10.1 2014 edition in any way. And also any difference in battery life? Thanks
iMLordJ said:
Please, does turning off power saving decrease the performance of the note 10.1 2014 edition in any way. And also any difference in battery life? Thanks
Click to expand...
Click to collapse
It will surely affect the performance of the tablet. I'm not sure about the difference in battery life tho because I also turn power saving mode on
Done some quick tests with and with out power savings mode, in short:
Battery life up 20 % better ( really depends on use and settings like screen brightness and so on)
performance impact , well in reality it seems to scale down cpu/ gpu power buy 60 %, but in real life terms the effect is far from that drastic. Most apps run as fin, no real lag increase, games work just fine, even emulator er ok. You do notice a bit of a lag on certain High rez games , with max quality. But so far Still very playable.
tested with
FPSE (PSX emu)
Need for speed
Bards Tale
Youtube app
VLC ( movie app)
Again these are somewhat subjective tests, and lag is somewhat a subjective element. I haven't done benchmarks and such, simply because benchmark rez don't always translate to real world experience
hy there,
im on latest sokp rom on my g2 (d802)
i want to get more juice from my battery, so I setup my core setings at 1036 mhz max and minimum 300 mhz.
wil this provide me a lot off battery in real life and will it also reduce heat ? even if i watch hd movie or play graphical games
In theory yes it should but not as much as you think cause it will be offset because it will have to keep a higher frequency for a higher period of time. Temperature should be reduced a lot but keep in mind games will lag if they need the extra power
drivenby said:
In theory yes it should but not as much as you think cause it will be offset because it will have to keep a higher frequency for a higher period of time. Temperature should be reduced a lot but keep in mind games will lag if they need the extra power
Click to expand...
Click to collapse
hmm, well after i underclocked i played asphalt 8 for like 20 mins and game performance did not changed significantly. and i feel that the phone is now cooler then before when multitasking stuff.
is there also another way that can realy increase battery life besides underclocking.
abati said:
hmm, well after i underclocked i played asphalt 8 for like 20 mins and game performance did not changed significantly. and i feel that the phone is now cooler then before when multitasking stuff.
is there also another way that can realy increase battery life besides underclocking.
Click to expand...
Click to collapse
you also can try custom governors
Hey there, you may be suffering a placebo effect, it can give you a little extra juice, but in my opinion you get most of your battery with these 4:
1. Reduce timeout to 15sec.
2. Adjust screen brightness to be as low as possible (lux helps with this)
3. Eliminate vibrations of any kind (haptic feedback, notications that make your phone vibrate ex. whatsapp) and so on...
4. Data (Use Wifi if possible, 2g when you are not using your phone and airplane mode in some cases extend your battery for a lot too)
Don't expect to get more than 30 min of extra use changing your kernel configurations. ALTHOUGH if you are a heavy user (let us say, in this case, a heavy gamer) there are some kernel configurations you should check.
Also remember, if a task takes you 30min but only consumes 1 % per 30 min compared to doing the exact same task in 30seconds consuming the same 1% which one is worth it?
Phones hardware is way above the software we have available at this time, underclocking and undervolting is an option and you won't feel the difference but, as I've stated before, those are not the main issues of the battery drain.
I hope I've helped you out!
Hey i tried many diffrent rom bui i can only get 2.5h SOT. Which kernel do you use and which rom to get the maximum battery life without lag?
Battery<----------------------------------->Performance
They are at opposite ends. If you want maximum battery life then there no way to avoid lag.
You can completely turn off 2 or 3 cores, leaving you with a single or dual core phone;
You can also underclock and undervolt the remaining cores, reducing power consumption even more.
This is very battery friendly (in theory), but, as I said, it will give you big lags.
I added a rom video review to the help thread. You might want to check it out.
obol2 said:
Hey i tried many diffrent rom bui i can only get 2.5h SOT. Which kernel do you use and which rom to get the maximum battery life without lag?
Click to expand...
Click to collapse
Sounds like you really need a new battery
GDReaper said:
Battery<----------------------------------->Performance
They are at opposite ends. If you want maximum battery life then there no way to avoid lag.
You can completely turn off 2 or 3 cores, leaving you with a single or dual core phone;
You can also underclock and undervolt the remaining cores, reducing power consumption even more.
This is very battery friendly (in theory), but, as I said, it will give you big lags.
I added a rom video review to the help thread. You might want to check it out.
Click to expand...
Click to collapse
Don't mean to troll, but can't help it. Turn a quad core cpu into a dual core? Really?!
Erm... ok.
thundastruck said:
Don't mean to troll, but can't help it. Turn a quad core cpu into a dual core? Really?!
Erm... ok.
Click to expand...
Click to collapse
Do you have any better ideas on how to increase battery life?
Cores need power to run. Turning them off is a completely logical option.
You really don't need all the cores for most tasks. You can browse Facebook, or whatever, just fine with only two cores.
I am currently running in dual-core mode with max cpu frequency at 1.2 GHz and it still is smooth.
GDReaper said:
Do you have any better ideas on how to increase battery life?
Cores need power to run. Turning them off is a completely logical option.
You really don't need all the cores for most tasks. You can browse Facebook, or whatever, just fine with only two cores.
I am currently running in dual-core mode with max cpu frequency at 1.2 GHz and it still is smooth.
Click to expand...
Click to collapse
I aldeady underclockt it to 1.2 ghz and undervolting it -625000 uV. Shut off to cores and use intellimm. I also under clock gpu to 320 mhz and under volt it 1 step down. I use zen with 1024 kb. Turn off android logger and zram. Use amplify, power nap, greenify and Max 700 mhz screen off. What I can do more?
obol2 said:
I aldeady underclockt it to 1.2 ghz and undervolting it -625000 uV. Shut off to cores and use intellimm. I also under clock gpu to 320 mhz and under volt it 1 step down. I use zen with 1024 kb. Turn off android logger and zram. Use amplify, power nap, greenify and Max 700 mhz screen off. What I can do more?
Click to expand...
Click to collapse
Nothing.
Test your battery. Or better yet, start thinking of getting a replacement or a new phone. With a 2 hour charge something seriously is wrong with your device.
My 3 year old S4-i9500 still comfortably gets through the day. Bought a brand new original battery 6 months ago. Smooth sailing. No under-volting, shutting off cores, under-clocking or any crap like that. Phone is custom rom'med and correctly so if I may add.
obol2 said:
I aldeady underclockt it to 1.2 ghz and undervolting it -625000 uV. Shut off to cores and use intellimm. I also under clock gpu to 320 mhz and under volt it 1 step down. I use zen with 1024 kb. Turn off android logger and zram. Use amplify, power nap, greenify and Max 700 mhz screen off. What I can do more?
Click to expand...
Click to collapse
lower values for read ahead cache are more battery friendly.
Also, bfq is considered more battery friendly too.
thundastruck said:
Nothing.
Test your battery. Or better yet, start thinking of getting a replacement or a new phone. With a 2 hour charge something seriously is wrong with your device.
My 3 year old S4-i9500 still comfortably gets through the day. Bought a brand new original battery 6 months ago. Smooth sailing. No under-volting, shutting off cores, under-clocking or any crap like that. Phone is custom rom'med and correctly so if I may add.
Click to expand...
Click to collapse
In two month I will get a new phone. I want to buy the lg v10 but don't know if it is worth or lg g4 / moto x style.
obol2 said:
In two month I will get a new phone. I want to buy the lg v10 but don't know if it is worth or lg g4 / moto x style.
Click to expand...
Click to collapse
Never heard of these models except for lg g4, which was crap imo.
thundastruck said:
With a 2 hour charge something seriously is wrong with your device.
My 3 year old S4-i9500 still comfortably gets through the day
Click to expand...
Click to collapse
You are aware that he said 2.5h SOT, "screen on time" ?
That means that after using it for an entire day or two, the combined time of the screen being on is 2.5 hours, and in my opinion that is not really bad.
The screen is always the culprit when it comes to power consumption, and in a phone with a battery that doesnt exeed 2000mah its just natural
that after about 2-3 hours of the screen being on the little battery is empty, and no ammount of undervolting will extend that significantly.
The only thing he can consider to increase SOT is a bigger battery, if he doesnt mind the bigger bulge at the back.
Backe888 said:
You are aware that he said 2.5h SOT, "screen on time" ?
That means that after using it for an entire day or two, the combined time of the screen being on is 2.5 hours, and in my opinion that is not really bad.
The screen is always the culprit when it comes to power consumption, and in a phone with a battery that doesnt exeed 2000mah its just natural
that after about 2-3 hours of the screen being on the little battery is empty, and no ammount of undervolting will extend that significantly.
The only thing he can consider to increase SOT is a bigger battery, if he doesnt mind the bigger bulge at the back.
Click to expand...
Click to collapse
Had no idea - never really cared what SOT stands for anyway! But thanks for clearing that up. Always had satisfactory battery life on my S4. The few times I didn't was when a rom on my phone went bad & subsequently had to flash another.
So if what you say is true regarding a day or 2 battery life, then what is this chump complaining about? Turning water into wine? :silly:
So @GDReaper idea is right!I currently am on crDroid and when I switch off 2 or 3 cores the phone is as fast as it was and the battery lasts a little bit longer..With normal charging it goes to full for about 1 hour and half and without using it the batttery lasts 1-2 days,using it lasts about 3 hours or 4.I flashed a new kernel and turned on fast charging on Kernel Adiutor,now the phone charges full for about 45 minutes and lasts same! I'm very happy with my battery bcs I haven't changed it since I got the phone!