I noticed that 1 hour of display on at normal brightness (just that, no aps running, no-nothing) drains my battery of about 20%, with the default wallpaper. I'm pretty "impressed" by this, and I wonder... is it normal?
In addition, I had a feeling that was more than confirmed by a specific test that I performed. Well oddly enough to say....
With display brightness set to minimum, and just the diplay on continuously for 20 mins, I get 10% battery drain, but...
With display brightness set to 60%, and again just the diplay on continuously for 20 mins, I get only 5%, and the units' temperature also lowers a bit!!!
I also get similar results (5% drain or so) with display brightness set to 80%...
Therefore, at least for my unit, it looks like for saving battery life, I should keep the display brightness fix at 60% or even more!
I don't know why this happens but I suspect that the brightness regulator of the display drains much more power than the amount it helps to save from dimming the display!
Anyone to confirm?
75 views and no reply?
Not to be rude, but there are a few threads concerning power consumption/battery use/display . if you have a browse around, and did some reading up, you would find some of the solutions that other people are using?
also, when posting a thread like this, you should try and give as much pertinent information as possible, for example, what firmware are you running? have you rooted the phone? is it branded or unbranded?
Again, not being rude to you. Just trying to give you some pointers.
stoney73 said:
Not to be rude, but there are a few threads concerning power consumption/battery use/display . if you have a browse around, or perhaps used the search function, and did some reading up, you would find some of the solutions that other people are using?
also, when posting a thread like this, you should try and give as much pertinent information as possible, for example, what firmware are you running? have you rooted the phone? is it branded or unbranded?
Again, not being rude to you. Just trying to give you some pointers.
Click to expand...
Click to collapse
Hi Stoney,
thank you but yes, actually I did make some search, but couldn't find anyone claiming that his dislay is draining more at dim than at full brightness... Maybe I was not searching in the right direction, in such case I would be pleased if you could give me some hints.
Cocerning my phone, it's unbranded and unrooted. I bought it 5 days ago, and I've updated it with Kies to the latest firmware available from Samsung:
Build is Gingerbread XWKE7
Kernel is 2.6.35.7-I9100XWKE7-CL215725
Baseband is I9100XWKE1
Did not notice any improvement, nor any degradation, in battery life after updating.
At the moment my battery is at 77%, and display is reported to have drained 68% of it, and it's reported to having been on for 1 h 15 mins.
This means that the display alone has drained 68% of 33% battery drain in 1 h 15 min, which makes approx. .68*33=22.5% of battery drain in 75 mins.
It means that, the display alone, without CPU or watever, totally drains my battery in 75*100/22.5=330 mins, or if you prefer, in 5 h 35 mins.
Well, I find this value really frustrating since aside from being miles away from my old nokia N95 8GB, I'm wondering how people can say that they get more than a full day of heavy usage out of this phone... I don't know if battery life is better or worse than other touch screen phones, because that's the first one I own, but I remember having read that Iphone 4 for instance, survives for more than 7 hours with continuous web browsing (and hence not only with the display on, but also with many other tasks running)...
JuniorGG said:
Hi Stoney,
thank you but yes, actually I did make some search, but couldn't find anyone claiming that his dislay is draining more at dim than at full brightness... Maybe I was not searching in the right direction, in such case I would be pleased if you could give me some hints.
Cocerning my phone, it's unbranded and unrooted. I bought it 5 days ago, and I've updated it with Kies to the latest firmware available from Samsung:
Build is Gingerbread XWKE7
Kernel is 2.6.35.7-I9100XWKE7-CL215725
Baseband is I9100XWKE1
Did not notice any improvement, nor any degradation, in battery life after updating.
At the moment my battery is at 77%, and display is reported to have drained 68% of it, and it's reported to having been on for 1 h 15 mins.
This means that the display alone has drained 68% of 33% battery drain in 1 h 15 min, which makes approx. .68*33=22.5% of battery drain in 75 mins.
It means that, the display alone, without CPU or watever, totally drains my battery in 75*100/22.5=330 mins, or if you prefer, in 5 h 35 mins.
Well, I find this value really frustrating since aside from being miles away from my old nokia N95 8GB, I'm wondering how people can say that they get more than a full day of heavy usage out of this phone... I don't know if battery life is better or worse than other touch screen phones, because that's the first one I own, but I remember having read that Iphone 4 for instance, survives for more than 7 hours with continuous web browsing (and hence not only with the display on, but also with many other tasks running)...
Click to expand...
Click to collapse
I can imagine it is quite frustrating, seeing people post that their phone is lasting a full day+(mine does) and yours isnt.
So what steps have you taken?
before updating to KE7, did you (backup your apps/anything on internal memory you want to save) and then wipe the cache, and factory reset(from the privacy settings on the phone)?
Do you use the samsung hubs/'AP app,etc? If not, have you tried freezing/deleting them?(I froze mine on the basis of you never know when/if you want to use them at some point)
These are the two things I did immediately after updating to KE7 and finding out it was draining the battery, after I performed those two steps, things went back to normal for me.
I dont tend to hammer the phone(now anyway), but on an ave day, I spend around 30-45 mins chat, 15-30 texts, 30-45 mins gaming, 2 email on push sync, fb/twitter updates, xda app. I dont tend to watch video much on it(I have a tab for that, a very much underused tab since I got the S2).
I usually have 20-30% battery come bedtime. I have the display on auto, timeout on 2 mins.
JuniorGG said:
This means that the display alone has drained 68% of 33% battery drain in 1 h 15 min, which makes approx. .68*33=22.5% of battery drain in 75 mins.
It means that, the display alone, without CPU or watever, totally drains my battery in 75*100/22.5=330 mins, or if you prefer, in 5 h 35 mins.
Well, I find this value really frustrating since aside from being miles away from my old nokia N95 8GB, I'm wondering how people can say that they get more than a full day of heavy usage out of this phone... I don't know if battery life is better or worse than other touch screen phones, because that's the first one I own, but I remember having read that Iphone 4 for instance, survives for more than 7 hours with continuous web browsing (and hence not only with the display on, but also with many other tasks running)...
Click to expand...
Click to collapse
You have to take two things into account:
1) Your N95 had a MUCH smaller display, with another screen technologie and fewer pixels, as well as a much slower chipset and no touchscreen.
2) The Iphone too has a smaller display, with backlighting, which drains less battery and has as well a less powerful SOC.
That a 4.3 inch display would drain the battery fast, shouldn't surprise anyone imo. Compared to the Iphone it's a ~20% difference in screensize. Since the displays drains most of the battery, it shouldn't surprise anyone that the Iphone lasts longer ...
Stoney, sorry but if you tell me to stop/freeze processes, you haven't understood my post. I repeat that the problem with my phone is the display that drains about 1Watt only for being on, no matter the brightness (actually, at high brignthess it drains LESS). This has nothing to do with processes. When the display of my phone is off, the battery lasts ages. For instance, this evening I went jogging for one hour with Sports Tracker (on GPS) and the music player always on, but the display off. The battery just dropped about 10%, which is perfectly normal. If instead I dare to turn on the display, I can actually see the battery draining and the phone becoming warm.
II would be useful if you could do a small check for me: after full charging the battery, leave the screen on for a while with about 50% brightness and the home screen. After 2 or 3 hours, could you please report to me the screen % usage, and the corresponding net "on" time? Only this can be a proof that my unit is faulty, and the display is draining much more power than normal.
Chalid, for sure this display is bigger than that of the iPhone and even bigger than that of the N95. But does this justify a cosumption of more than 1 W (since it drains the full 7Wh battery in just 5.5 hours)? Well, in my opinion, by no means! And besides, where the AMOLED displays said to require less power than LCDs, or were they not?
IMHO a display draining more than 1 W is a killer on any mobile phone! (again: UNLESS mine is faulty for some reason)
JuniorGG said:
Hi Stoney,
thank you but yes, actually I did make some search, but couldn't find anyone claiming that his dislay is draining more at dim than at full brightness... Maybe I was not searching in the right direction, in such case I would be pleased if you could give me some hints.
Cocerning my phone, it's unbranded and unrooted. I bought it 5 days ago, and I've updated it with Kies to the latest firmware available from Samsung:
Build is Gingerbread XWKE7
Kernel is 2.6.35.7-I9100XWKE7-CL215725
Baseband is I9100XWKE1
Did not notice any improvement, nor any degradation, in battery life after updating.
At the moment my battery is at 77%, and display is reported to have drained 68% of it, and it's reported to having been on for 1 h 15 mins.
This means that the display alone has drained 68% of 33% battery drain in 1 h 15 min, which makes approx. .68*33=22.5% of battery drain in 75 mins.
It means that, the display alone, without CPU or watever, totally drains my battery in 75*100/22.5=330 mins, or if you prefer, in 5 h 35 mins.
Well, I find this value really frustrating since aside from being miles away from my old nokia N95 8GB, I'm wondering how people can say that they get more than a full day of heavy usage out of this phone... I don't know if battery life is better or worse than other touch screen phones, because that's the first one I own, but I remember having read that Iphone 4 for instance, survives for more than 7 hours with continuous web browsing (and hence not only with the display on, but also with many other tasks running)...
Click to expand...
Click to collapse
*cough* 100% - 77% = 23% = 15.64% in 75min is quite good to be honest.
480mins which is 8hours straight display on time....very good if u ask me.
Sent from my GT-I9100 using Tapatalk
1 hour 8mins with my display on today has used 17.98% of my total battery with brightness at auto
My screen eats also alot of the battary.
Like 4-5 hours and thats all and on minimum brightness.
I try to set it on 60 percent also and ofc autobrightness disabled.
Report later
is it true that the phone uses less battery when you select a brightness of 60%+ or auto? cause I use 15% all the time.
i have the same problem,never under 45%.
ke2!
guigs91 said:
i have the same problem,never under 45%.
ke2!
Click to expand...
Click to collapse
Screen is a drainer. I NEVER use auto brightness ... I set it to 0~20 when inside and only higher when outside in sunny conditions.
JuniorGG said:
Stoney, sorry but if you tell me to stop/freeze processes, you haven't understood my post. I repeat that the problem with my phone is the display that drains about 1Watt only for being on, no matter the brightness (actually, at high brignthess it drains LESS). This has nothing to do with processes. When the display of my phone is off, the battery lasts ages. For instance, this evening I went jogging for one hour with Sports Tracker (on GPS) and the music player always on, but the display off. The battery just dropped about 10%, which is perfectly normal. If instead I dare to turn on the display, I can actually see the battery draining and the phone becoming warm.
II would be useful if you could do a small check for me: after full charging the battery, leave the screen on for a while with about 50% brightness and the home screen. After 2 or 3 hours, could you please report to me the screen % usage, and the corresponding net "on" time? Only this can be a proof that my unit is faulty, and the display is draining much more power than normal.
Chalid, for sure this display is bigger than that of the iPhone and even bigger than that of the N95. But does this justify a cosumption of more than 1 W (since it drains the full 7Wh battery in just 5.5 hours)? Well, in my opinion, by no means! And besides, where the AMOLED displays said to require less power than LCDs, or were they not?
IMHO a display draining more than 1 W is a killer on any mobile phone! (again: UNLESS mine is faulty for some reason)
Click to expand...
Click to collapse
amoled screens were quoted to consumers as using less power. but the tests i've done, i contend that amoled uses far more power than the SLCD screens HTC is using for example. like significantly more. so the screen is a killer for sure on your device, dont get fooled.
JuniorGG said:
Chalid, for sure this display is bigger than that of the iPhone and even bigger than that of the N95. But does this justify a cosumption of more than 1 W (since it drains the full 7Wh battery in just 5.5 hours)? Well, in my opinion, by no means! And besides, where the AMOLED displays said to require less power than LCDs, or were they not?
IMHO a display draining more than 1 W is a killer on any mobile phone! (again: UNLESS mine is faulty for some reason)
Click to expand...
Click to collapse
Like Locster126 pointed out, it's only 15.64% for your 75 minutes of usage. The battery has 6,11Wh, which makes a power consumption of approx. 0,76W. But you must not forget, that the AMOLED display drain is highly dependent on the content you're displaying. Thats the difference to the LCD. While the LCDs backlight is mostly responsible for the drain, the AMOLEDs individual pixels drain the battery, which means that light-colored content drains more battery - more than on the LCD, while dark-colored content doesn't.
Nothing wrong with your screen.
EDIT: I will test the power consumption of the HD2s screen later ..
Mittaa said:
Screen is a drainer. I NEVER use auto brightness ... I set it to 0~20 when inside and only higher when outside in sunny conditions.
Click to expand...
Click to collapse
i try everything(auto,or not) but don't work,sorry for my english
chalid said:
Like Locster126 pointed out, it's only 15.64% for your 75 minutes of usage. The battery has 6,11Wh, which makes a power consumption of approx. 0,76W.
EDIT: I will test the power consumption of the HD2s screen later ..
Click to expand...
Click to collapse
Just finished the testing. After loading the HTC HD2 to 100% in flight-mode, I unplugged it and let the screen continuously on at full brightness for 30 minutes. The battery went down to 92%. So 8% for half an hour. That means, the screens power consumption at full brightness is ~0,73W (battery capacity is 4,55Wh).
So definitely lower than your SAMOLED power consumption ... but so is the display quality ...
Locster126 said:
*cough* 100% - 77% = 23% = 15.64% in 75min is quite good to be honest.
480mins which is 8hours straight display on time....very good if u ask me.
Sent from my GT-I9100 using Tapatalk
Click to expand...
Click to collapse
Oops! You're right!
Well ok, 8 hours so....
And considering that the battery has a capacity of 6.2Wh, the display actually drains 0.78W, at normal brightness (auto brightness was set to on and I was indoor, daytime).
In any case, that's not totally fair because it doesn't consider all the rest that's draining power from the battery. Considering my "normal" usage of the device, I get about 60% display ratio after a full battery discharge (to be optimistic).
This means that I have .6*8= 4.8 hours of "normal" usage to spread across the day.
I don't play 3D games and use WiFi just for syncing the emails and podcasts (10 minutes to say the most). I also don't use Bluetooth. I keep the GPS on all the time but turn on packet data strictly when necessary, and make just 5 minutes of calls and send 5 SMS... In substance, I use the device like a normal 150 euros phone.
This is my first touch screen device (as I said,I come from a Nokia N95 8GB), therefore I would like to understand if 4.8 hours continuous normal usage of the phone from fully charged to "mayday, shutting off!" can be considered normal.
I don't uderstand how some people can say they get one full day heavy usage on it, or 2 full days normal usage, playing 3D games, continuously syncing accounts, watching videos, surfing the internet, etc!!!!
My replies (thank you all) ->
to (•.•) (nice your nickname! ):
not far from mine. Tell me if you get some improvement at 60%. I will also repeat the test on mine, trying to be more systematic as possible, since I really want to be sure of what I have seen.
to seaweeduk:
please be more clear. Just the display or the entire unit? In any case that seems to be a much smaller consumption than that of my display...
to guigs91:
you mean you also noticed this odd behaviour?
to Mittaa:
right, but before setting brightness to a low level I want to be sure that it actually drains less power, and that's how I figured out that actually it's the other way around (I hope I made something wrong, as said I'll re-check better).
to RogerPodacter:
sadly, I perfectly agree with you.
to chalid:
thank you for reassuring me. To be honest however I'm not totally sure that black pictures drain significantly less power than white ones. I feel more that it's simply the bias current of the display, to drain a lot, and the rest is not so important. In fact, if you look at a 100% black picture totally in the dark, you'll see that it's not fully black. I's ALMOST fully black (much more than LCDs), but you can actually notice that the display is on (and therefore it is powered). If you shut off the display, you'll notice the diference.
to guigs91:
I also tried everything without success. Apart from noticing that perhaps high display brightness helps a little!
Did I forget someone? Ah yes, tommehh :
this is what I noticed. Let me re-check 'cause I find hard to believe myself!
JuniorGG said:
I don't uderstand how some people can say they get one full day heavy usage on it, or 2 full days normal usage, playing 3D games, continuously syncing accounts, watching videos, surfing the internet, etc!!!!
Click to expand...
Click to collapse
Well, you don't have the screen on for 5 hours continuously when using the phone, do you?
Here are my batterys stats:
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"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
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Display: 2h 12m = 20%
Phone calls: 28m 24s = 9%
That's absolutely okay in my opinion. But like I said: If you want 1 week usage off one charge, you need to get a phone with a smaller display, because all of those 3.5+ inch touchscreens drain the battery pretty fast.
i'm only getting 4 hours of battery life
truevietkieu said:
i'm only getting 4 hours of battery life
Click to expand...
Click to collapse
There is much discussion on mastering your battery life in other sections, but concentraining on the app part alone, I would say Juice Defender has made a huge difference for me. I can get over 24 hours unplugged with about 3-5 hours of screen on time. The free Juice Defender helped a bit, but it wasn''t until I bought Juice Defender Ultimate that I saw large gains in life. I basically run my phone set up so that it kills all data connections and checks periodically (5 minute intervals) for notifications. Also, I have it set to learn so that when it knows I'm in an aread (based on tower ID, not GPS) that I do not use Wife, it will not bother looking for it. There are a ton of little settings that you can tweak to find just the right balance of saving verse use.
I've heard good things about Juice Defender as well.
Juice Defender:
https://play.google.com/store/apps/...yLDEsImNvbS5sYXRlZHJvaWQuanVpY2VkZWZlbmRlciJd
Juice Defender Ultimate
https://play.google.com/store/apps/...EwMiwiY29tLmxhdGVkcm9pZC51bHRpbWF0ZWp1aWNlIl0.
Juice Defender Battery Plotter
https://play.google.com/store/apps/...DEwMiwiY29tLmxhdGVkcm9pZC5qdWljZXBsb3R0ZXIiXQ..
I agree with both above about Juice Defender. I've had JD since my Vibrant days and found it to be very useful. May I also suggest a "all black" wallpaper and lowering your brightness to its lowest, this has also help me tons.
GL to you!
I too rep juice Defender like a champ. however............
if your getting only 4 hours battery lift, then their is probably a more serious issues. Im not sure wakelocks alone could even account for such poor battery longevity.
I would also recommend CPUspy from the market. This is a helpful tool to make sure your phone is going into deep sleep mode.
BigBison420 said:
I too rep juice Defender like a champ. however............
if your getting only 4 hours battery lift, then their is probably a more serious issues. Im not sure wakelocks alone could even account for such poor battery longevity.
I would also recommend CPUspy from the market. This is a helpful tool to make sure your phone is going into deep sleep mode.
Click to expand...
Click to collapse
The key question is 4 hours of what? If I sat and played games for 4 hours, my phone would be dead or close to it depending on the game.
Lol. Not even! Modern combat can drain 10% of my batt in 20 mins
Sent from my SAMSUNG-SGH-I717 using XDA
you need to install BetterBatteryStats to find out what's eating your battery. I use to use JuiceDefender & my biggest complaint was it was having a hard time reconnecting to wifi once the screen was on. I got fed up & went to GreenPower which has more options, IMHO.
I can get 15-16 hours of run time with 4 hours of screen time with the following. No Juice Defender.
Wifi off. Data and BT on. Screen Filter set to 75% most of the time, and 30% in pitch black. Screen Filter is a biggie - even Juice Defender can't cut the power useage of the single biggest drain on this phone... the screen.
Pls say where I can find screen filter setting. Thnx
Sent from my SAMSUNG-SGH-I717 using Tapatalk
Turning off auto brightness, and turning off screen auto rotate (and enabling it only when needed) help quite a lot!
Screen Filter is an application. Its primary use is to dim your screen far lower than the stock "low" setting. In many people's opinion the low setting is still way too bright in a dark room - Screen Filter lets you go as dim as you want, although too low and it makes everything look gray which is why I stick to 30%.
I noticed that it works along with the built-in auto brightness setting, and the app will allow you to dim the screen only a little if you want, so I started using it all the time on a 75% setting. The screen will still brigten and dim based on ambient light, but it will just be a little dimmer than stock. I've found a 75% setting along with auto brightness works well in all situations except full sun or a dark room, so I have two Widgets on my home screen - one for 75% (most of the time), one for 30% (for a dark room), and I'll turn it off for full sun. A lot less fiddling around than turning auto brightness off and manually adjusting the brightness all the time.
Since LED screens use less energy the darker they are, this effectively extends your battery run-time.
Are u on t-mobile?
Sent from my SAMSUNG-SGH-I717 using XDA App
Who, me? Nope, AT&T.
No guy getting four hours seems that if ur using ut on T-mobile The battery life sucks customers of the radio
Sent from my SAMSUNG-SGH-I717 using XDA App
The mediapad is my first tablet. I just bought a second hand one, and two things trouble me:
1) The RAM in active processes is displayed as 512, should it not be 1GB?
2) battery life seems too low, something along the lines of 3 hours of mainly google play use. I have high resolution set, active wifi, had no sim inserted, though plane mode was not activated.
A lot of devices display less memory than you think they should, it's ok don't worry.
Yes the battery does not last very long...
Sent from my HUAWEI MediaPad using Tapatalk 2
mediapad battery life
If you go to settings/applications/running services you should see bar at the bottom of the screen indicating free and used ram. Mine is standing at 191MB used and 434MB free at the moment.
I was going to ask about battery life myself, so here is a question for all other mediapad users: How much "screen on" time do you get per charge?
No matter what I do, I can't even get close to 6 hours that are specified.
The best I got was 5:15, and that was offline (wifi and 3G), brightness on minimum (bedtime reading), JuiceDefender on.
Only apps I was using were Adobe Reader, ComicRack and Amazon Kindle.
If I use Opera, Facebook, YouTube, StumbleUpon, News360, I get about 4 hours of "screen on" time.
When I look at battery usage breakdown in settings, display or wifi are never at the top. Usually there is AndroidOS or Android System, followed by some of the apps I was using.
If I play GTA3 (ver1.3 works great btw), it drains about 20% per 15 minutes of playtime.
On occasion it happens that battery drains at usual rate to about 15%, and then the shutdown countdown begins, as battery drops from ~15% to zero instantly.
Also, sometimes when it drops to 20% goes back to 30%, then from 10% goes back to 20% and from there drains to zero normally. It drives me crazy as I'm never sure how much juice I have left.
Tried to use Battery Calibrator app, but still the problem still persists. Can't root, still have year of warranty left.
Do you guys have any similar issues, how do you cope? And don't forget to tell us your "screen on" times and typical usage.
Thanks!
I know this might be somewhat of a gravedig but I really need to correct things a bit...
With WiFi on, screen brightness down and constant screen on + surfing / reading I was able to squeeze out 7 hours and 10 minutes out of the battery, starting at 100%...
The battery really is awesome! Just make sure to turn off things you dont need (Bluetooth, GPS, 3G / Mobile Data, Screen Brightness).
I'm surprised, in a positive way.
The only problem I got is with the touchscreen shaking and at times not taking my taps.