Develop Bugs

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

Is my battery usage normal? I have attached the image.

HTC Wildfire
CM 7.1.0.1
NO live wallpapers
NO GPS usage

Do you take a lot of photos? Have you been leaving the Camera app by hitting the home button? Your camera app seems to be running a lot so use the back button to exit it if you don't already.
Considering you've always got Wifi on I don't think your battery life is that bad.

First screen no, second yes. As Chris said, I think you are leaving the camera on or you might use the flash in the middle of daylight. If you aren't, use the back button instead of home. Also turn off the WiFi when you're not using it. You can also set the screen timeout to 7 seconds or turn the display brightness down or to auto.

usaff22 said:
First screen no, second yes. As Chris said, I think you are leaving the camera on or you might use the flash in the middle of daylight. If you aren't, use the back button instead of home. Also turn off the WiFi when you're not using it. You can also set the screen timeout to 7 seconds or turn the display brightness down or to auto.
Click to expand...
Click to collapse
My display brightness is always low.
And I guess that Camera360 app had a prob. I removed it and now it does not show up in the Battery Usage. That screenshot was taken a few days ago.
I get around 30 hours of battery life after full charging.
Is this normal for HTC Wildfire CM 7.1.0.1?
Thanks a lot for your replies

yash_p90 said:
My display brightness is always low.
And I guess that Camera360 app had a prob. I removed it and now it does not show up in the Battery Usage. That screenshot was taken a few days ago.
I get around 30 hours of battery life after full charging.
Is this normal for HTC Wildfire CM 7.1.0.1?
Thanks a lot for your replies
Click to expand...
Click to collapse
Lol,if I got 30 hours from my normal usage I would be ecstatic, i get about 18 hours max but I do use it a hell of a lot.
"sent from me2u"

slymobi said:
Lol,if I got 30 hours from my normal usage I would be ecstatic, i get about 18 hours max but I do use it a hell of a lot.
"sent from me2u"
Click to expand...
Click to collapse
There were times when i used to get 48 hrs of battery life after i installed CM7.
That is why i asked
Thanks anyways
18 hrs??
U must b using a lot of GPS..

Lol 18 hours is a lot to me, I'm lucky if mine lasts till 5pm after a full night on charge!!
Sent from my HTC Wildfire using xda premium

18 Max just a rough guess and that's with all sync and background turned off,never use GPS or wifi either really,just that my phone is kind of glued to my hand lol and is always on looking on xda for the next mod/new app or messing with my screens to try and find a setup i might keep for longer than a day ha ha.I actually carry my charger round with me lol.
"sent from me2u"

Amazing battery life on stock !!

Hi ppl,
probably all of you already noticed this trick.
Just in case you didn't... here it is.
On 2nd charge, I could see battery charge graph going down with no stop, even with screen off !
So, I installed BetterBatteryStats (XDA).
Battery killer was HTC Weather.
Guess what ?
On a freshly, just bought HTC One X, Sense refreshes, hourly
Your weather's location (so also GPS eating battery, but it's perhaps acceptable)
Weather from the most important cities in your country (Italy = 15 more or less) !!!!
Once removed all those static defined cities, leaving just the "where I am" and 1 static, HTC Weater became tamed and sane.
And my battery graph on screen off is now FLAT. With Wifi and data on.
I'll not get more scientific here.
The issue is very subtle and unsuspicious; the trick is very easy; the benefits are TREMENDOUS.
I also made refresh interval up to 3 hours. It should help too.
Still, the terrific impact was given by removing those 15 static locations.
I also left enabled the "refresh when opening weather" flag.
Happy trying !

chareos12 said:
Hi ppl,
probably all of you already noticed this trick.
Just in case you didn't... here it is.
On 2nd charge, I could see battery charge graph going down with no stop, even with screen off !
So, I installed BetterBatteryStats (XDA).
Battery killer was HTC Weather.
Guess what ?
On a freshly, just bought HTC One X, Sense refreshes, hourly
Your weather's location (so also GPS eating battery)
Weather from the most important cities in your country (Italy = 15 more or less) !!!!
Once removed all those static defined cities, leaving just the "where I am" and 1 static, HTC Weater became tamed and sane.
And my battery graph on screen off is now FLAT. With Wifi and data on.
I'll not get more scientific here.
The issue is very subtle and unsuspicious; the trick is very easy; the benefits are TREMENDOUS.
Happy trying !
Click to expand...
Click to collapse
I did this on my Rom (charmander) just has your location and that's it. Always done this on my personal roms also but never thought of it so save battery lol.
Sent from my HTC One X using xda premium

It has dramatic battery usage.
Then, I also made refresh interval up to 3 hours. It may help too.
Still, the terrific impact was given by removing those 15 static locations.

First thing I've done since my Desire is remove everything except 'My current location'...I don't need to know the weather anywhere else!

EddyOS said:
First thing I've done since my Desire is remove everything except 'My current location'...I don't need to know the weather anywhere else!
Click to expand...
Click to collapse
Couldnt agree more. Who cares about weather somewhere else!
Sent from my HTC One X using xda premium

Who cares about inaccurate accuweather info anyway, it's terrible. The only thing it's good for is telling me what it's like now (I have known that to be wrong too). I've got these amazing glass panels in my walls so I can see what the weather is like now. I just don't use it so I turn weather sync off.
I only wish there was an option to change where the weather data comes from like in so many other apps/widgets. MeteoGroup, for example, seems much better.

Same here and ive hit 3 days and 3.5 hours of.screen time.before now.
Sent from my HTC One X using XDA

Actually I can understand that 1-2 static places could be handy, while planning a trip on a sudden.
But... 15 static places (can't imagine how many they were in bigger countries !!) is just a plain overkill, a complete suicide by HTC.
About accuracy... it seems precise enough here in Italy. Surely it's different as per country.

Please could you take screenshots of your screen on time and battery usage page also what brightness your using. I have a One X resting in the box because it simply can't make it through a working day. My Nokia N8 with the same type of usage. GPS,Weather,whatsapp,calls,web. Is full to almost full by 5pm. Mind you this is with 3G turned off.
Now I'm not expecting the one X to be anywhere near that good but if this would mean the phone lasts me an entire day of normal smartphone usage then I might just dust it off xD.

Vandal4125 said:
Please could you take screenshots of your screen on time and battery usage page also what brightness your using. I have a One X resting in the box because it simply can't make it through a working day. My Nokia N8 with the same type of usage. GPS,Weather,whatsapp,calls,web. Is full to almost full by 5pm. Mind you this is with 3G turned off.
Now I'm not expecting the one X to be anywhere near that good but if this would mean the phone lasts me an entire day of normal smartphone usage then I might just dust it off xD.
Click to expand...
Click to collapse
Check the battery stats thread.
Sent from my HTC One X using XDA

Hmm, seems quite decent. You have some amazing on screen time. I could barely manage 3hrs with auto brightness. Did you notice this increase after removing the other city locations?
What were your stats before removing the extra weather app cities?
I would actually love to know the OP's stats. He says its "TREMENDOUS"

i have not even touched the settings to weather and mine (based in london dunno if makes difference) only shows my current location and refresh every 6 hours or upon open that was my default settings

Vandal4125 said:
Please could you take screenshots of your screen on time and battery usage page also what brightness your using. I have a One X resting in the box because it simply can't make it through a working day. My Nokia N8 with the same type of usage. GPS,Weather,whatsapp,calls,web. Is full to almost full by 5pm. Mind you this is with 3G turned off.
Now I'm not expecting the one X to be anywhere near that good but if this would mean the phone lasts me an entire day of normal smartphone usage then I might just dust it off xD.
Click to expand...
Click to collapse
Yup, not really going to take screenshots today
I'd say to you that today I noticed
- phone unplugged at 9.45
- 18.30 (so nearly 9 hours later) I had 3hrs screen on time - intense usage due to SSLauncher setting up - and still 40% battery left.
3G on all the time, a couple of calls, many market downloads.

Vandal4125 said:
Hmm, seems quite decent. You have some amazing on screen time. I could barely manage 3hrs with auto brightness. Did you notice this increase after removing the other city locations?
What were your stats before removing the extra weather app cities?
I would actually love to know the OP's stats. He says its "TREMENDOUS"
Click to expand...
Click to collapse
Before the Weather static positions cleanup: 2 hours screen on, battery empty.
After the cleanup: 3+ hours and still 25-30% battery to go.
As I stated in 1st post, I won't go much scientific, other threads are already there with much more data and insight...
yet, the improvement looks TREMENDOUS *thunder* *evil laugh* to me

Back to my phone... 1% battery left
I see:
12h 7min unplugged
4h 49 screen on time
all time with 3G on, all sync (Facebook, Linkedin) on, intense usage due to device setting up (SSLauncher, maps regions pre-download, Flipboard sync and a lot more)
Won't go more scientific than this

Awesome guys, just put the phone on charge, lets see how it goes tomorrow Maybe I'll finally fall in love with my One X

So I took it of the charger @ 6am today. It is now 5pm and normally the battery would be dead by now. At the moment it is @ 43%.
My brightness is set to auto and the phone tells me my on screen time is only 53mins. You guys are talking about something like 4hrs on screen with this fix. So I don't think it has improved much.
However I'm sure that my battery stats are off because it tells me it's only been off the charger for 4hrs. So I can put up actual stats tomorrow, if it resets properly tonight.

Vandal4125 said:
So I took it of the charger @ 6am today. It is now 5pm and normally the battery would be dead by now. At the moment it is @ 43%.
My brightness is set to auto and the phone tells me my on screen time is only 53mins. You guys are talking about something like 4hrs on screen with this fix. So I don't think it has improved much.
However I'm sure that my battery stats are off because it tells me it's only been off the charger for 4hrs. So I can put up actual stats tomorrow, if it resets properly tonight.
Click to expand...
Click to collapse
I noticed that if you reboot the phone, every counter (unplugged time, screen on time) resets, f*cking up measurements.
Could it possibly be your case ?
Damn, I'm going too scientific

Batt bad bad bad

I´ve just moved from th GS2 to the HOX and even though I had read reports about the battery not being so good I was really surprised at how bad it is! I mean with the GS2 I would watch about 1 hours of videos, navigate a little bit, check my calendar several times and talk a couple of times and I would get home at the end of the day with about 80% full batt...I do the same with the HOX and it´s almost half that! Plus it takes forever to charge when compared to the GS2, GS1 and the Atrix. Is it really that bad or is my unit faulty? Is there a mod or an update that can probably address this?

If you used to get all of that use out of 20% of your sgs2 battery, you probably had a really good sgs2 because I could never achieve anything like that.
Sent from my HTC One X using Tapatalk 2

So you just got it and reporting a bad battery after a first charge probably? Use it more and report again then...

Well I´ve had several other smartphones that didn´t have this issue after I "just got them".

I think you GS2 is incredible

Cycle the batt
The hox has wayyy better batt life than any samsung
I don't miss the 3% increase an hour it took for any samsung to charge once they are dead forget about getting a fast charge may as well have a spare charged n ready or how about the can not use camera bs!! because the battery is to low... to function the cam
Lol all that crap is history.
Charge the phone with data toggled off
Set screen to 15sec time out
I'm getting 15-16 hrs out of mine on heavy use
Sent from my HTC One X using XDA

I must have faulty unit then because I really don´t see it. I´ve used the GS2 for an year and the battery was supperb. And I had the screen set for maximum light ALL THE TIME.

rawfa said:
I must have faulty unit then because I really don´t see it. I´ve used the GS2 for an year and the battery was supperb. And I had the screen set for maximum light ALL THE TIME.
Click to expand...
Click to collapse
I came from the SGS2 which was running VillainRom with an underclocked CPU with under volt. (Auto Brightness)
.... and my stock HOX gives better battery life whilst having a much brighter default auto brightness.
Under my usage, I would never get over 3:xxhrs screen on time, so if you used 100% brightness, you can probably half that.
Also regarding streaming (as I do a lot of it), my ex SGS2 would die after around 6hrs whereas the HOX can do 9+hrs, ive tested these thoroughly.
So, I really don't understand this thread.
Sent from my Xoom using Tapatalk 2

rawfa said:
I must have faulty unit then because I really don´t see it. I´ve used the GS2 for an year and the battery was supperb. And I had the screen set for maximum light ALL THE TIME.
Click to expand...
Click to collapse
Remember that you have a li-po battery in the HOX ... you need some charging cycles to get the full performance of the battery

muamers said:
Remember that you have a li-po battery in the HOX ... you need some charging cycles to get the full performance of the battery
Click to expand...
Click to collapse
Thanks. I didn´t know that. I will work on it.

HOX= HTC One X ??? how long can batt use??

Well even me coming from the SGS2 I can say it had the better battery life with an extended battery. Could easily get 4-6 screen on time on various things. HOX is fine but not as good as SGS2 with extended battery.
Currently in Turkey on roaming and idle time in this is quite excellent the 5th core works fine in idling.
Sent from my HTC One X using Tapatalk 2

My battery was ****e for the first week of having the phone. Can't complain now though, it definitely out performs my previous handset (Sensation XE)
Sent from my HTC One X using xda premium

@liberator 72 - What settings did you have for screen brightness? Was it auto or did you set it manually to a low value? I am asking as I can't get past 3h of screen time, about 10 days after I bought the One X.

StefanCelMare said:
@liberator 72 - What settings did you have for screen brightness? Was it auto or did you set it manually to a low value? I am asking as I can't get past 3h of screen time, about 10 days after I bought the One X.
Click to expand...
Click to collapse
Auto brightness. Pretty much standard stock setup with only a few of the bloatware apps disabled in the apps settings and haptic feedback turned off. All accounts setup to auto sync too! It took a good couple weeks for the battery to last that long but now on moderate use I can get 2 days out of it.
Sent from my HTC One X using xda premium

It's all about charge cycling the battery and adjusting settings
Sync off screen time out display background data etc....
It will get better my silver hox right now is new but I have a white hox that has awesome batt life
Sent from my HTC One X using XDA

Not too shabby. Virtual constant use with WiFi and GPS both on.
Sent from my HTC One X using xda premium

If you want to be sure that you don't have a faulty battery you can always perform the HTC test , type *#*#3424#*#* in the phone and look for battery test.

Tried that got the O2 woman.
Sent from my HTC One X using xda premium
edit: working. I just have fat fingers.

Not really now
I used to get only 8 hours out of my HOX with it getting extremely hot. But then someone suggested me to perform the following steps in exactly this order.
1. Turn Wifi Off, set sleep mode to "always".
2. Turn 3G data On
3. Turn 3G Data Off
4. Turn WiFi back on
5. Close Maps, Gtalk and any other Google service when not using the same.
I am getting 48 hours on an average with 3 hour screen On time. I am On 1.28 Stock.

How to set my display ???

How to set my display to lower my
Battery to drain slower???
...like u see I always on between 56-65 %
.my brightness is set lowest
Sent from my SGH-T989 using Tapatalk 2

I set mine to 50-75% when I'm indoors, when I'm in the sun I have to bump it up to 100%. I don't notice much battery drain from normal usage, only with games and video, they normally drain batteries really fast. I don't play any games only some YouTube or videos I took.

kola2121 said:
How to set my display to lower my
Battery to drain slower???
...like u see I always on between 56-65 %
.my brightness is set lowest
Sent from my SGH-T989 using Tapatalk 2
Click to expand...
Click to collapse
If you go to settings then power saving, you will see custom power saving settings you can then adjust how to same battery including the option for brightness.

I always keep mine at full brightness and I've gotten killer battery life. My phone averages 3-4 hours screen on time. Of course I can make that stretch 5 hours or one whole day. Depends on how much you use your phone of course.
Sent from my SGH-T989 using xda premium