Develop Bugs

Decrease Screen Brightness -> save battery

Hi,
I found this:
chart
Short explanation for non german reader:
max brightness
iphone 4: 486 cd/m²
SGS: 311 cd/m²
Nexus 1: 217 cd/m²
min brightness
iphone 4: 3 cd/m²
Nexus 1: 24 cd/m²
SGS: 84 cd/m²
As you can see, the screen brightness is still very very high, even if you set it to the lowest value.
So i took a look into the settings.db and saw, that the value for screen_brightness was 30, not 0. (I had set the brightness to the lowest possible before).
Maybe the Samsung preferences don't let you set the lowest available brightness?
I set the value to 0, but I'm not sure the brightness changed. =/
Someone else wanna try this and measure if the brightness really decreases?
Could save some battery...

Nice one, because of the technology we generally use less power than iPhone 4 for display HOWEVER if you display a lot of whites the AMOLED screen has the *POTENTIAL* (note: potential) to use 30% more power than the iPhone 4's H-IPS Backlit LCD.
So, another power saver tip is to use dark backgrounds as white/light ones use a lot more display power. This is a side effect of the AMOLED technology.

This is probably the biggest quibble I've with this phone right now, so I was glad to find this post from supercurio's (creater of Voodoo) twitter: "Wow, minimum brightness on #GalaxyS can be tweaked to extremely low levels !"
I hope he'll share these findings with us soon.

Its pissing me off sooo much. Like at night even at min brightness its too bright, browsing market blinds me. Can't wait for supercurio's thing, he said he got the profiles figured out.
For now all i know is 18 is the lowest u can go, anything below just completely turns the backlight off.

You guys tried dimmer from market? Goes to 10.
Sent from my GT-I9000 using Tapatalk

I simply pay more attention to my brightness now and control it myself. It adds to the to do list BUT I have gained about 30% battery life per day by doing it.
I find unless I'm in the sun there is no need to go beyond 38%.

Any of you see a big battery difference with brightness??

So I've always used my phones with automatic brightness, but it seemed like this one would always be really low. The only time I would see the brightness change at all was when I'd take my phone out in the day when it was sunny. So I decided to switch it to full brightness on all the time and haven't really noticed a big difference in battery life. Plus with such a great display it looks so much better with the full brightness on. Any of you tried this and notice a big battery drain??
Sent from Flip's SGS2

Im the opposite of you. If i have my brightness pass mid, my battery will be drained in no time. So i am forced to use low. I cant even use Auto Adjust, because that will also use a lot of battery. Mid and higher, my battery drainage will be around 59%-65%

For me full brightness really kills my battery. I I used to do full brightness but after going on my quest to improve my battery life I ended up sticking with ~50% brightness
Sent from my SGH-T989 using Tapatalk

The display is (generally) the biggest drain on your battery, so adjusting the brightness level accordingly definitely has an effect one way or the other. If I'm not in direct sunlight I leave my brightness very low, usually around ~15-20%
One of the biggest battery savers I found was a new watch my wife bought me. No more turning the display on/off throughout the day just to see what time it is

[Q] Screen Mode & Battery Consumption

Ok so the Note's got Dynamic, Standard, Natural & Movie screen modes (in order of saturation).
Would a more saturated Screen Mode chew up more battery, because you'd think the OLED would require more power to produce a more vivid/saturated image.
I haven't seen it mentioned/discussed anywhere...It might be worth testing out, although I don't know how much of a difference it would really make...
P.s. I'm not talking about the brightness or backlight at all. We all know that makes a BIG difference.

Saturation of colors should NOT make a big difference. (provided overall brightness is the same)
Let me explain with an example :
Red on full saturation only uses the red leds (at full brightness)
While red on 0 saturation uses all 3 colors at much less brightness
Sent from my GT-N7100 using xda premium

I actually kinda put the same question nobody replied to me aha
It was in Q&A section, I thought I put it in the right place... but If its answered here its fine ^

Didn't know that about the screen. Which mode are you guys using? I always have stuck with dynamic.

TBH from 60% to 100% brightness i see NO noticable diffrence in battery life, on LCD and TFT screens brightness does vary the battery life a lot, but on the note 2 it barely shows any difference especially if most your usage involves dark/black backgrounds

Brightness

Anyone else think the brightness is not very bright? I have turned auto brightness of but slider is on around 75 to 80% in normal conditions?

Seems fine to me. Depends entirely on what you are comparing it to, though.
With the brightness dialed all the way up, it looks either brighter or dimmer than my P2XL depending on the angle, so...

I have come from iphone x and (work phone) huawei p20 pro.
Right way up or 80% is fine but say half way 50% is loads lower than most other phones

jonezy8873 said:
Anyone else think the brightness is not very bright? I have turned auto brightness of but slider is on around 75 to 80% in normal conditions?
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The display could be brighter, I feel 100% should have been what 90% would be. 50 and below is too dark to be used at all imo.

If it just flat doesn't get bright enough for you you're kinda screwed. If you're wondering about auto brightness you gotta keep on cranking it up for a week or so before it starts giving in and giving you what you asked for; at least this was the case with my 3 XL. Seems to be the case here, mine is still slowly but surely getting brighter as I keep on dutifully upping it to the desired setting in various conditions. It worked very well before, the best I've used so far and I'm hoping the same will go on here.
The auto-brightness is supposed to be fairly intelligent BTW: As an example it's supposed to recognize the middle of the night and that your sleeping and turn the brightness down more with the same brightness information available than it would in the early evening when it knows you're awake. As an FYI the adaptive battery feature also seemed to need some time to figure out what it wanted to do. I had my 3XL for about a week last fall and the battery situation was slowly but surely getting better every day just like the auto brightness. No idea if either would have continued to improve after I sent that one back but they both needed time, that was for sure.

[GUIDE] Getting the best battery life

Hello,
I've been using this device for about 5 months now and the battery life for me has been great so far, but there's so much you can do when you need the juice in your battery last longer. In order to help those who want to get the best battery life out of their phone, I've compiled a list of things I do to make my phone last longer.
We'll go from the things most effective to the least and mind you, all of these can be done without rooting of using ADB etc. So let's start
'''Turn on Gray Scale'''
As we have an AMOLED screen, turning on grey scale will give you an improvement in battery life of around 25-35 %, and it's especially noticable if you use your phone in high brightness mode.
'''Dark theme'''
Dark theme obviously saves battery on our phone, there's and awesome guide on XDA guiding you to do it without rooting or using any theme engine.
'''Set brightness to 50%'''
Our eyes don't perceive brightness linearly, so 100% brightness will take around 50-70% percent more battery than 50%, but going much lower won't help either cause increasing brightness from 0-50% results in around 20-30% extra power draw.
'''Restrict background running of less used apps'''
You can restrict an app from running in the background and this setting is baked right into the App Info settings,
Go to app info and tap on battery usage, from there, restrict the app.
'''Enable data saver'''
This can be enabled via Quick Settings menu and this can drastically save battery if you're mostly on Mobile data.
'''Turn off Auto Sync'''
It is long known that doing this can save a bit of battery.
'''Enable Battery Saver'''
Pretty self explanatory.
'''Change minimum width'''
Set minimum width to anything less than 400, this leads to less information being displayed on screen which results in lower usage of GPU, and thus better battery (somewhat)
'''Reduce animation duration scale'''
This will speed up everything and improve battery life just a bit.
And that's it from me, if I remember anything else, I'll make sure to add it, and please make sure to tell me anything that works for you, I'll happily add it.

If you want to get absolutely the best battery life out of your device, you must install a custom kernel. I'm using Fenix currently.
Also, turn off printing service. This idiotic thing is turned on by default. It keeps sucking battery for no reason at all. I'm not using stock ROM now but you can find it by going to: Settings>Bluetooth & Devices (or something similar)

Can you post the link of the thread for enabling dark mode I would like to try that.

Another tip - switch to airplane mode, mobile network is one of the biggest battery consumer..
But seriously, how does greyscale mode save the battery? Instead of glowing one of the subpixels for displaying a color, all of them must be shining to provide different shades of white color. It might even use more power.
Width change and animation duration scale have some very interesting thinking behind them, it will have absolutely no impact on the battery.
Dudes, just enjoy and use the phone. Why do you want to cripple your experience just to gain extra few percents of battery per day? If you're living of the grid, there are much better phones for such a lifestyle.

_mysiak_ said:
Another tip - switch to airplane mode, mobile network is one of the biggest battery consumer..
But seriously, how does greyscale mode save the battery? Instead of glowing one of the subpixels for displaying a color, all of them must be shining to provide different shades of white color. It might even use more power.
Width change and animation duration scale have some very interesting thinking behind them, it will have absolutely no impact on the battery.
Dudes, just enjoy and use the phone. Why do you want to cripple your experience just to gain extra few percents of battery per day? If you're living of the grid, there are much better phones for such a lifestyle.
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There's an XDA article comparing battery saving with AMOLED on black and grey theme, you might want to check it out, or you can also watch a video by Mrwhosetheboss to see how it went for him. As for animation speed and DPI, they have the least effect on battery life as I've stated above. Kindly do some research before you start making claims.

FranzScarrey said:
Can you post the link of the thread for enabling dark mode I would like to try that.
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It requires you to have Magisk tho.

RizwanH20 said:
There's an XDA article comparing battery saving with AMOLED on black and grey theme, you might want to check it out, or you can also watch a video by Mrwhosetheboss to see how it went for him. As for animation speed and DPI, they have the least effect on battery life as I've stated above. Kindly do some research before you start making claims.
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Where exactly in the article does it say that monochrome display saves power over colored one? Actually it's you who started with unique claims, so please provide some proof.