I was looking around some of the battery stats and it came to my attention that some sensors seem to be operating alot of the time. I figure this has alot to do with the standby power consumption ive been experiencing with CM7.
The point is, i cant find any way to control sensor behaviour to test this out. Is anyone aware of any app or script which helps with this? Because i have not been able to find any.
Sent from my MB860 using XDA App
seriously? nothing?
im sure someone can come up with something
What sensors are you talking about?
Im not sure, but when i go in spare parts and look as sensor usage it says android system has been using sensors for 3 and something hours and the same goes for dialer and gallery.
whats for sure is that my screen hasnt even been on for half that long, so what im thinking is some of the sensors must be collecting data while the phone is supposed to be sleeping and that should account for some of the phone idle battery usage.
my idea is to turn off all the sensors (which i dont use anyway except for maybe the proximity one during calls) and see how it affects battery usage.
however i have yet to find a way to manipulate or turn off any of the sensors on this phone.
If you disable screen rotation, that will probably shut down the accelerometer/orientation sensor.
turl1 said:
If you disable screen rotation, that will probably shut down the accelerometer/orientation sensor.
Click to expand...
Click to collapse
that one is pretty obvious and while i doubt that will turn off the sensor (might just tell the device to ignore its readings but it doesn't mean the sensor is shut down) there are still 5-6 more sensors running on this device and what im looking for is a way to shut them down on the hardware level. i figure this is kernel-related but still this can't be the first time anyone has brought this up.
Then delete /system/lib/hw/sensors.olympus.so, that will disable them all, they won't even be initialized
Not sure if your phone will like it though, nandroid backup first
turl1 said:
Then delete /system/lib/hw/sensors.olympus.so, that will disable them all, they won't even be initialized
Not sure if your phone will like it though, nandroid backup first
Click to expand...
Click to collapse
currently in the army so i cant say i'm in an environment to be getting my phone into boot loops but do you figure there is a more friendly way to edit that file rather then deleting it?
There's no source for the sensors library, so unless someone wants to disassemble it and rewrite from scratch, no.
and you dont figure that will be something worth looking into in the great journy towards great battery life?
Sorry for hijacking this but how do you enable the the spare parts app?
guybanda said:
and you dont figure that will be something worth looking into in the great journy towards great battery life?
Click to expand...
Click to collapse
I already get more than a full day with pretty heavy use, enough greatness for me
---------- Post added at 10:34 PM ---------- Previous post was at 10:33 PM ----------
Spectre51 said:
Sorry for hijacking this but how do you enable the the spare parts app?
Click to expand...
Click to collapse
CM7 has it on the ROM, for other ROMs you can install one from the market
Not much help, but to confirm your findings, if the proximity sensor is on, a little red light appears. Look out for it. If it is always on, you have a problem.
Sent from my MB860 using XDA App
matthew5025 said:
Not much help, but to confirm your findings, if the proximity sensor is on, a little red light appears. Look out for it. If it is always on, you have a problem.
Sent from my MB860 using XDA App
Click to expand...
Click to collapse
True. However running elixir i see that this phone has 8 sensors in total. It also claims that some of them use between 6 to 8 mA while in use. Cant really say what that means battery wise or even if its correct but i still think its worth looking into
Sent from my MB860 using XDA App
Any sensor in particular you are concerned about?
If im trusting elixir.. the magnetometor, rotation vector and orientation are what we should be concernef about. It claims the rest use negligible amounts but i dont know if we can believe that (says light sensor uses no power at all which i find a little hard to believe)
Sent from my MB860 using XDA App
guybanda said:
True. However running elixir i see that this phone has 8 sensors in total. It also claims that some of them use between 6 to 8 mA while in use. Cant really say what that means battery wise or even if its correct but i still think its worth looking into
Sent from my MB860 using XDA App
Click to expand...
Click to collapse
8 mA draw would kill your battery after 9-10 days. Not a very significant drain...
Sent from my MB860 using xda premium
guybanda said:
If im trusting elixir.. the magnetometor, rotation vector and orientation are what we should be concernef about. It claims the rest use negligible amounts but i dont know if we can believe that (says light sensor uses no power at all which i find a little hard to believe)
Sent from my MB860 using XDA App
Click to expand...
Click to collapse
Hmmm. The 3-axis geomagnetic sensor in the atrix, the AK8975/B has a
consumption of
- 3-axis magnetism measurement (ave.): 350μA (typ.) at 8 Hz repetition rate
-Power-down: 3 μA (typ.)
That is 0.00035A if it is constantly pooling at 8x a second!
The accelerometer in the atrix is the KXTF9 series and assuming the atrix has the most power hungry version, the KXTF9-2050, it can only draw a maximum of 940μA and typically draws a current of 840μA. It's standby current draw is 0.1μA or 0.0000001A and at that rating, our 1930 mAh battery can keep it in standby for about 2 million years!
In short, the sensors don't draw alot of power, despite what the apps say, it the people who made those sensors say they cannot exceed such a current draw, that's that. You might want to look at apps who are actually requesting the data from the sensors, and not the sensors themselves.
Well then like i said the programs which seem to be using the data are noted as android services, dialer and gallery. So i dont know if theres much you can do about that....
Sent from my MB860 using XDA App
xfinrodx said:
8 mA draw would kill your battery after 9-10 days. Not a very significant drain...
Sent from my MB860 using xda premium
Click to expand...
Click to collapse
Well then according to your calculations: if thats one sensor theb that means 3 sensors would kill the battery in 3 days. Which ofcourse means they would use about a third of the battery in one day.
I personally find this hard to believe but it still means significant drain.
Sent from my MB860 using XDA App
Related
Does the gps really use much more battery if kept on? I've always been under the impression that it would drain the battery quicker than anything else. Recently though, I've just been leaving it on constantly and have noticed very little extra battery usage. It seems to come on briefly when I do a search or other location using services, but it didn't seem to be an extra drain otherwise.
Anyone have any input or some input about gps battery usage?
Sent from my <tw> powered vibrant.
As far as I know, the GPS only kicks on when an app requires it. So unless you have something in the background that's constantly asking for your location it shouldn't really drain the battery in a way that would be notisible.... As far as I know
Sent from my HTC Glacier using XDA App
Sounds about right just make sure you don't have a lot of apps running that use the gps
Sent from my EVO 4G using XDA App
In earlier versions of Android, having the GPS setting "on" actually activated the GPS system directly. In current versions, the setting only controls whether GPS-aware apps are allowed to use GPS at all, or not.
So as you have surmised, leaving the setting "on" doesn't use any additional battery power unless you're actually running a GPS-related app (Maps, navigation, camera, etc).
To save battery, just turn on GPS whenever you need it.
No idea why should leave it on all the time, coz it is really draining battery if it is running (to be clear when it is really running but not just on)
I haven't turned my gps off in 2 months and I average between 12 and 18 hours of moderate use.
Sent from my SGH-T959 using XDA App
Emama said:
To save battery, just turn on GPS whenever you need it.
No idea why should leave it on all the time, coz it is really draining battery if it is running (to be clear when it is really running but not just on)
Click to expand...
Click to collapse
The point the OP is trying to make is that GPS doesn't drain the battery unless you're in an app that uses it.
I leave it on because only a handful of apps use it, and I'm usually not in those alps for hours at a time.
Sent from my SGH-T959 using XDA App
Emama said:
To save battery, just turn on GPS whenever you need it.
No idea why should leave it on all the time, coz it is really draining battery if it is running (to be clear when it is really running but not just on)
Click to expand...
Click to collapse
For people who are prone to losing their phones, such as my GF, its a good idea to leave it on and installing an app like Lost Phone where you can send the lost phone a txt and receive a map view of its exact location. As far as i know the android OS does not support remote activation so it must be left on. Like others have mentioned it does not cause a noticeable battery drain while its not in use. Its come in handy numerous times...too many times...
Sent from my SGH-T959 using XDA App
Thanks everyone, that's good to know! I understand I will see some additional battery usage when I'm in an app that uses gps, but I was really just curious if I could leave gps "on" while idle and not experience any additional battery use.
Sent from my <tw> powered vibrant.
Yep, yes you can
Sent from my HTC Glacier using XDA App
I have the Telus Fascinate which is the same as the Tmobile Vibrant.
I notice that when checking my battery usage that the display is using a whopping 92% of the battery. Is there a fix to reduce it?
I have automatic display unchecked and display brightness to 0.
Sent from my SGH-T959D using XDA App
Nope, but then that doesn't mean the display has used up 98% of the battery the whole time the phone has been on. I could be wrong, but the way I read that info is when the phone is awake, the screen uses the most power in relation to the other listed items. I've noticed on days when I have alot of phone calls, it listed the radio instead of display as the top user.
If you want more detailed usage, I think spare parts shows full battery stats. But I use an app called Battery Left and it has access to the full battery stats.
Thanks!
I will look into both of those apps.
Sent from my SGH-T959D using XDA App
What yatina said. And i recommend using android assistant app in the market if you really want to know what exactly is draining ur battery.
Sent from my full Trigger powered SGH-T959 using XDA App
Display using battery is a good thing. Means only drain is from being on rather than the other **** draining it...
smashpunks said:
Display using battery is a good thing. Means only drain is from being on rather than the other **** draining it...
Click to expand...
Click to collapse
Thats never the case though.
Sent from my full Trigger powered SGH-T959 using XDA App
Abu-7abash said:
Thats never the case though.
Sent from my full Trigger powered SGH-T959 using XDA App
Click to expand...
Click to collapse
Actually it is.
For a average user, meaning not too much phone calls etc. Display WILL always and SHOULD always be the highest.
It just says that theres no other apps acting up.
but it is good to look at MORE detailed stats than the default one though, its not that accurate.
1 hour of display time will use approximately 20% of your battery. This is and always will be the case.
xriderx66 said:
Actually it is.
For a average user, meaning not too much phone calls etc. Display WILL always and SHOULD always be the highest.
It just says that theres no other apps acting up.
but it is good to look at MORE detailed stats than the default one though, its not that accurate.
Click to expand...
Click to collapse
I meant that the stats where it says more than 90% of battery had been drained on display is false. As apps and other daily uses usually contributes about 35-70% of that usage.
Screen brightness doesn't have that HUGE devastation on the battery, when it's in normal percentage ofcourse.
if you're worried about your display draining the battery use the app called screen filter. works like a charm
Also, I'm not sure if this is for rooted phones only, but typing *#*#4636#*#* pulls up usage statistics like battery information and battery history. I think it gives you a better idea of what's going on with your battery.
On every rom I have used, when I'm outside in a pitch black situation and I need my flashlight on my phone. When I leave it on for more than 60 seconds, the phone automatically restarts. I suppose because the LED gets too hot? This is on Torch bright widget or widgetsoid flashlight using method 2 for led. However I'm fairly sure that using heart rate monitor app in the market the phone can stay on with the flashlight for more than 60 seconds. I'm going to test this now. This is weird since my HTC HD2 could leave the led flashlight on for hours if I wanted. Well I never had it on for more than say 20 minutes but it worked and the phone never restarted. Any help would be great, thanks!
By the way this happens on all roms including with all kernels and all radios.
I wouldn't leave it on for more than 10 seconds at a time. That is just plain stupid.
Damn I hate useless replies!
Sent from my MB860 using XDA Premium App
Ok try this out. You're going to burn out your LED and the reason it restarts is from the heat. When you take a pic in your camera app does the LED flash for 60 seconds? um no.... you need a flashlight? Get those small LED keychain ones.. how's that for useful? Use your head....
And tour HD2 does not have a Tegra 2 in it so perhaps why that one does not overheat. Either way you'll kill the LED. They aren't designed to be used like that.
I have the exact same problem on CM7 - was fine on my HD2 for a very long time too
At times I find myself needing a flashlight for a minute or 2 at times. The HD2's LED never overheated unless you left in death ray mode but I'm not sure since I can't remember ever having a problem ever. Just use regular brightness at a reduced continuous voltage therefore reducing heat production. That's not stupid to need my f*ing phone as a flashlight for a couple minutes when needed. LED's are very efficient and can take a hell of a beating, however they're efficient in nature so leaving it on may reduce it's life sure. But has anyone reported their cell phone led light going out? I have never heard of it so stop posting stupid idiotic comments. Posting dumb offensive comments makes you look stupid. You could respond with an intelligent response unleashing to the world your hidden genius. Instead you decide to do what you do best.
If anyone who may be having the same problem. I have found a solution to the problem. Downloading instant heart rate monitor will allow the light to stay on forever with no problems.
Later
Atrix_E said:
And tour HD2 does not have a Tegra 2 in it so perhaps why that one does not overheat. Either way you'll kill the LED. They aren't designed to be used like that.
Click to expand...
Click to collapse
I'm sorry. I do understand you stating they aren't designed to do that. However I don't care what you think about cell phone led's. I asked a question therefore I would expect an answer. Not an electronic's lecture.
1chris89 said:
I'm sorry. I do understand you stating they aren't designed to do that. However I don't care what you think about cell phone led's. I asked a question therefore I would expect an answer. Not an electronic's lecture.
Click to expand...
Click to collapse
That was my answer. Sorry that you do not like it. Why not troll on now about video playback on your HD2?
Had the same problem with widgetsoid.
Download Tiny Flashlight + LED from the marketplace. My 60 second reboot problem does not happen with this particular application. I am on stock at&t rom rooted.
Sent from my MB860 using XDA App
Atrix_E said:
That was my answer. Sorry that you do not like it. Why not troll on now about video playback on your HD2?
Click to expand...
Click to collapse
Well my suggestion is to you. Next time you post a comment. Please take a moment to think about the question. So then you can give a helpful answer. Questions are meant to be answered, nothing more and nothing less.
jmaddr said:
Had the same problem with widgetsoid.
Download Tiny Flashlight + LED from the marketplace. My 60 second reboot problem does not happen with this particular application. I am on stock at&t rom rooted.
Sent from my MB860 using XDA App
Click to expand...
Click to collapse
Thanks buddy! I will give that app a shot. As for the moment. Instant heart rate monitor from the market works wonderfully.
1chris89 said:
Well my suggestion is to you. Next time you post a comment. Please take a moment to think about the question. So then you can give a helpful answer. Questions are meant to be answered, nothing more and nothing less.
Click to expand...
Click to collapse
Noted and thought about. Wouldn't change my answer.
First of all you don't have to be a flamer, second....you have no clue what your talking about. The led light is led ...led lights put out insanely low amounts of heat...which is why that technology has been incorporated into growing plants...not that it's good ti leave the led on for too long but I have uses the led flashlight for about 30 minutes before on my ATRIX, ya it gets a little warm but that's it. Yes it's possible to burn it out over time but you will be fine for short durations. Why do you think there are so many flashlight apps, if they really caused that much damage google would remove those apps from the market.
And im not talking out if my ass because I know quite a bit on the topic of led technology.
The possible reason for your phone rebooting is because a lot of the flashlight apps out there aren't compatable with the ATRIX for some reason, don't ask me why. You need to download "droidlight" from the market because it was developed for Motorola phones by Motorola ...then I doubt you will be rebooting
But please don't talk like your an expert on the subject and give false information to people because it just adds to confusion for those that don't know. Im no expert on everything so I don't chime in on things I don't know about. Cheers
Sent from my MB860 using XDA Premium App
Atrix_E said:
That was my answer. Sorry that you do not like it. Why not troll on now about video playback on your HD2?
Click to expand...
Click to collapse
Also you should be suspended by mr.clown for a comment like that.
Sent from my MB860 using XDA Premium App
Tiny flashlight +led works great. Has a good widget as well. Don't recall having a timeout. Accidentally turned it on and fell asleep for hour. Woke up to a dead battery and a brown spot on the coffee table lol. Led was still kicking an hour later. I use mine all the time.
Sent from my MB860 using xda premium
Its more than likely the app, I have the same problem using Tesla led + widget locker + cm7. Disregard about damaging your LEDs, as long as the proper voltage is applied... they will never burn out... if its getting HOT(not warm) then I would be worried. LED lights do have a "lifespan" but generally exceed it, tremendously.
Sent from my MB860 using XDA Premium App
J-Roc said:
First of all you don't have to be a flamer, second....you have no clue what your talking about. The led light is led ...led lights put out insanely low amounts of heat...which is why that technology has been incorporated into growing plants...not that it's good ti leave the led on for too long but I have uses the led flashlight for about 30 minutes before on my ATRIX, ya it gets a little warm but that's it. Yes it's possible to burn it out over time but you will be fine for short durations. Why do you think there are so many flashlight apps, if they really caused that much damage google would remove those apps from the market.
And im not talking out if my ass because I know quite a bit on the topic of led technology.
The possible reason for your phone rebooting is because a lot of the flashlight apps out there aren't compatable with the ATRIX for some reason, don't ask me why. You need to download "droidlight" from the market because it was developed for Motorola phones by Motorola ...then I doubt you will be rebooting
But please don't talk like your an expert on the subject and give false information to people because it just adds to confusion for those that don't know. Im no expert on everything so I don't chime in on things I don't know about. Cheers
Sent from my MB860 using XDA Premium App
Click to expand...
Click to collapse
I mean I don't really know anything about it, but if my LED light is on (for a flashlight) it get's noticeably hot within like 10 seconds...
I haven't quite had the same problem as the OP, but I was using TeslaLED with Widgetsoid (had a flashlight toggle in my rotary slider). I turned the screen on, and without unlocking used the flashlight like normal a few days ago, and had it on for 10+ seconds (after 10, my screen timed out like normal). I went to turn the screen on again though, and my entire phone froze - with the LED still on! I had to remove the battery...
I dunno all the technicalities of the LED, nor do I know if this was a freak accident and won't happen again (hopefully!). Might be a problem with TeslaLED/Widgetsoid, or maybe the screen shouldn't go off when the LED is on?
EDIT: Weird, I just tried it out again for fun, and it did in fact freeze my phone again lol. It did the exact same thing: turn on screen, turn on flashlight, use for like 10 seconds. Screen times out, flashlight flickers. Turn screen on, looks normal, but try to turn flashlight off, feel slight haptic feedback then froze.
Being an electrician by trade, I also specialize in luminaire devices, and tend to push LED devices over traditional flourescent, incandescent, halogen & HPS/MH lamps, for various reasons & applications. In fact LEDs last longer than the auxiliary components driving them .. which is why the still have a rated life span, many suppliers guarantee 12,000+ hours.
Sent from my MB860 using XDA Premium App
JaronBang said:
Its more than likely the app, I have the same problem using Tesla led + widget locker + cm7. Disregard about damaging your LEDs, as long as the proper voltage is applied... they will never burn out... if its getting HOT(not warm) then I would be worried. LED lights do have a "lifespan" but generally exceed it, tremendously.
Sent from my MB860 using XDA Premium App
Click to expand...
Click to collapse
I don't know about everyone else but my led starts getting hot after only having it on for ~10 seconds. I try not to leave it on because of the heat. But yah I do leave it on for more than a minute all the time so it was probably the specific app causing a rare OS bug that caused it to crash.
Dear People,
I am posting this out of big ENVY from my friend's story of his iPh*** 4 battery life with 40hrs ++ of usage (social network on, moderate usage, data always on, bla bla bla) and he still got 20% left of his battery!!!
I was just wondering did anyone managed to experience 40hrs ++ of battery lifetime? My best achievement with my nexus s battery life is
1 day 3 hrs with
MIUI Rom JB 2.8.17
Marmite Kernel 4.3
SmartassV2/deadline
100/1000
Automatic brightness on
Could we EVER achieved 40hrs ++ battery lifetime??? Since Iph*** 4 has practically same specs with Nexus S
It has 1Ghz procs, 512mb ram, 1500mah battery, bla bla bla
Any comments?
A very big advantage of the iphone is the very dim (to my opinion) screen backlight. If you change that to default 1 min instead of 20 on a custom rom, and then change your auto brightness values as well to lower ones your lifetime should increase alot. At least mine does. Also I use Llama to close mobile data after 5 minutes of sleep and then instantly turn it on on unlock. Anyway..we will never be able to win versus apple at some things. They have one operating system made for one device. We got one operating system for like..1 milion devices? That's the same story of console vs pc games.
andrei.voinea93 said:
A very big advantage of the iphone is the very dim (to my opinion) screen backlight. If you change that to default 1 min instead of 20 on a custom rom, and then change your auto brightness values as well to lower ones your lifetime should increase alot. At least mine does. Also I use Llama to close mobile data after 5 minutes of sleep and then instantly turn it on on unlock. Anyway..we will never be able to win versus apple at some things. They have one operating system made for one device. We got one operating system for like..1 milion devices? That's the same story of console vs pc games.
Click to expand...
Click to collapse
Never used iOS devices before...So they have those kind of things hey..
I agree with you with the point that their OS was made for one device, while us is for millions
Thanks for the comment
I've been getting pretty excellent battery life lately, will put up a screen shot but got almost 52hrs battery life with wifi and 3g on until it got to about 15% with about 2h 24m screen on time, although this was pretty light usage to be fair.
Using codename 3.3.2 with standard kernal, I turned NFC off and this seemed to help massively although I've also heard the new Maps app has solved some battery drain so not sure which has contributed the most.
cptblubear said:
I've been getting pretty excellent battery life lately, will put up a screen shot but got almost 52hrs battery life with wifi and 3g on until it got to about 15% with about 2h 24m screen on time, although this was pretty light usage to be fair.
Using codename 3.3.2 with standard kernal, I turned NFC off and this seemed to help massively although I've also heard the new Maps app has solved some battery drain so not sure which has contributed the most.
Click to expand...
Click to collapse
52hrs?????? Cant wait for your screenshots man!
You may think the specs are the same, but the hw in the iPhone and power management is still superior. They get a push notification, even while the 3g radio is in idle and almost off (in which it saves more power). It's hard for Android to optimize the power management specially because of that many hardware variations, it's not only the CPU that counts.
madd0g said:
You may think the specs are the same, but the hw in the iPhone and power management is still superior. They get a push notification, even while the 3g radio is in idle and almost off (in which it saves more power). It's hard for Android to optimize the power management specially because of that many hardware variations, it's not only the CPU that counts.
Click to expand...
Click to collapse
Well, thats good to know, but since its the software differences (meaning coding and stuff), surely (i assume and hope) that we could also applied it (somehow) in our devices through tweaks, can we?
IMHO not much is possible since this is older hardware already and a question for how long will Google bother with it. It might be alot of work needed and you gain some insignificant amount of savings.
Would be nice to see some kind of power management tweaks in coming version of Android though.
well its halfly because android works differently and half way because of the hardware.
yes, the hardware is similar, but the nexus screen takes up more power, the processor is not very efficient, and nfc takes up power... also, the 3g radios are honestly HORRIBLE on the nexus s and that might have something to do with it.
but, the software side does make a major impact. iPhones do not multitask like android, which saves power on slower devices like the iphone 4. thats only half of it though, for instance, the iphone 4S has much worse battery life than the nexus s (by far). ROMs make a big difference also, I am very picky when choosing a ROM- if it doesnt have great battery life then I immediately replace it by another ROM that does.
I get on average about 16-20hours pretty consistantly if you are wondering, and I am OK with that as long as it makes it to the end of the day... I wake at 3:30 and normally it does. My advice is to experiment with different ROMs, I would suggest some, but I use an S 4G...
I don't really believe it. My friend has an iPhone and he uses it quit a bit and seems to have to keep it plugged in as much as I keep my phone. I think he said he usually gets about 8 hrs out of it. And the screen is pretty dull compared to mine so that might make a difference to
Sent from my Nexus S 4G using xda app-developers app
The iPhone screen is a lot smaller too and that's a big tradeoff.
I always get a chuckle at the iHerd people I see on the bus holding their tiny screen 6 inches in front of their face so they can read it.
If battery life is really a concern get a couple of spare batteries and a charger.
Sent from my Crespo using xda premium
heccubusxda said:
The iPhone screen is a lot smaller too and that's a big tradeoff.
I always get a chuckle at the iHerd people I see on the bus holding their tiny screen 6 inches in front of their face so they can read it.
If battery life is really a concern get a couple of spare batteries and a charger.
Sent from my Crespo using xda premium
Click to expand...
Click to collapse
Or an extended battery...
Sent from my Nexus S 4G using xda app-developers app
heccubusxda said:
The iPhone screen is a lot smaller too and that's a big tradeoff.
I always get a chuckle at the iHerd people I see on the bus holding their tiny screen 6 inches in front of their face so they can read it.
If battery life is really a concern get a couple of spare batteries and a charger.
Sent from my Crespo using xda premium
Click to expand...
Click to collapse
Thats a good point too, smaller screen
Use this as yours to shut him up apples wack i got this oc to 1400 on stock with air kernel 186
Sent from my Nexus S using xda premium
nucleor1989 said:
Use this as yours to shut him up apples wack i got this oc to 1400 on stock with air kernel 186
Sent from my Nexus S using xda premium
Click to expand...
Click to collapse
Whoaaaah! What rom and settings? Awesome!
Sent from my SGH-T959V using xda app-developers app
Data was on all the time ? Ive got 33 hrs once but this is insane
I have achieved 50 hours on cna ... yes codename android but dang I forgot to take a screenshot of it I didn't have data on that time though
Sent from my Nexus S using xda premium
Lasting 40+ hours is easy if you don't use the phone much...
The screenshot was taken on a long weekend a while ago. I was busy during the weekend and didn't use my phone much apart from listening to music for no more than 2 hours.
Si_NZ said:
Lasting 40+ hours is easy if you don't use the phone much...
The screenshot was taken on a long weekend a while ago. I was busy during the weekend and didn't use my phone much apart from listening to music for no more than 2 hours.
Click to expand...
Click to collapse
Thats true, but from the iphone their data was on all the time, mid moderate usage.
But, just like some people said, power managwment chip, the os, makes big differences
Sent from my SGH-T959V using xda app-developers app
I just found this out yesterday but the Note 2 has a separate controller for gathering sensor data.
In short, unlike previously where the CPU had to wake up to gather data, a dedicated low power processor takes care of this!
It works for the accelerometer, magnetosensor, and orientation sensors for sure.
It may also work for the other ones.
Source: Samsung SGS2 Note Development Engineer i talked to yesterday at Samsung's Tech Fair
Interesting. I wonder if that's partly why it gets such fantastic battery life?
Sent from my SGH-T889 using Tapatalk 2
Instead of waking up the whole phone it uses a low-power unit for sensors?
It sounds plausible.
Like when you move your hand above the front sensors when the phone's locked, and half of the screen lights up for a few seconds.
Handwritten from my GT-N 7100
how about the wifi and bluetooth? if i turn on the wifi and bluetooth all the time, will i get less battery drain than other device?
Olaeli said:
Instead of waking up the whole phone it uses a low-power unit for sensors?
It sounds plausible.
Like when you move your hand above the front sensors when the phone's locked, and half of the screen lights up for a few seconds.
Handwritten from my GT-N 7100
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yes that is exactly one of the features it enables without destroying battery life
dseo80 said:
yes that is exactly one of the features it enables without destroying battery life
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And I guess, the Smart Stay, which checks on you every now and then when looking at the screen.
Olaeli said:
And I guess, the Smart Stay, which checks on you every now and then when looking at the screen.
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Doesn't Smart Stay use the front-facing camera? I understand that the camera isn't a sensor, as opposed to the proximity and light sensors beside it (correct me if I'm wrong...)
MarionCast said:
Doesn't Smart Stay use the front-facing camera? I understand that the camera isn't a sensor, as opposed to the proximity and light sensors beside it (correct me if I'm wrong...)
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Smart Stay pushes the CPU freq to 1600 (aka max freq) every time it has to check.
I don't use smart stay.I prefer a longer battery life.
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DanDroidian said:
I don't use smart stay.I prefer a longer battery life.
Sent from my GT-N7100 using Tapatalk 2
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if u never idle til the timeout, smart stay wouldnt activate and no battery drain
emprize said:
if u never idle til the timeout, smart stay wouldnt activate and no battery drain
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Once it activates, does it continue to check at the regular intervals you have set?
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DanDroidian said:
Once it activates, does it continue to check at the regular intervals you have set?
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afaik it only check when u idle til timeout, so if u keep interact, it should be no extra battery drain
never knew this, great find
It makes sense. That's how it keeps the accelerometer on to let you know when you a missed call or message. And also led notifications hehe. Makes sense to me! And I'm glad they did it this way.
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emprize said:
afaik it only check when u idle til timeout, so if u keep interact, it should be no extra battery drain
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It also shows a little eye symbol in the status bar when it does it. Just before the screen dims it checks to see if someone it looking at it then again just before the screen turns off.
DanDroidian said:
I don't use smart stay.I prefer a longer battery life.
Sent from my GT-N7100 using Tapatalk 2
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I have smart stay turned on and i don't notice any real difference in battery life.
Sent from my SGH-T889 using Tapatalk 2
Chrissssssss said:
It also shows a little eye symbol in the status bar when it does it. Just before the screen dims it checks to see if someone it looking at it then again just before the screen turns off.
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busab said:
I have smart stay turned on and i don't notice any real difference in battery life.
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Thanks to everyone for that!
Explained well! And I'll definitely use it from now on! It seems it might possibly use less battery to use this feature than having to tough the screen sometimes to stop it from turning off, and if you're not looking at it, it will just turn off like it normally would.
Basically, I have my timeout set to 1 minute.
Normally, I have to scroll up or down when I see the screen get dim moments before turning off. That's annoying, and sometimes probably spend more time touching the screen and messing something up when trying to do that.
With Smart Stay, if I'm looking at the screen, it checks for a split second (and you see the little "eye" symbol pop up) and it never dims out out either. That is really nice, and I don't have to keep messing with the screen to make sure it doesn't time out, which probably saves battery too. It continues to check for a split second every 1 minute.
If I'm not looking, it simply turns off.
Will definitely be using it from now on!
I also tried the feature where the red glowing sensor stays on ALL THE TIME WHEN THE SCREEN IS OFF and you can wave your hand over it to see missed calls, song playing, status bar, etc...
I'm gonna pass on this last feature. Not very helpful, and that must drain your battery somewhat faster, as you can even see the red glowing sensor on all the time when the screen is off. No thank you.
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smart stay i suppose only uses the ffc when your phone is about to sleep. if you set it to 1 min, it'll check every min, 5 min, every 5 min. i don't think it'll use much battery.
the only problem i have with smart stay is that even when i lay it down on my talbe in front of me while browsing on my pc, it wouldnt' sleep. i need to place it away from my face so the ffc can't see my eyes.
For a few years now, there has been another core or companion core in smart phones that handles minimal situations. It is a low power core that does not require the resources of the main processing unit. Tegra calls it “4+1” technology which means there are 4 cores running at the same speed and a slower fifth core that can handle most of what you’d be doing on your device. Here is their comments:
http://blogs.nvidia.com/2012/02/technology-formerly-known-as-vsmp-gets-a-new-stage-name-4-plus-1-2/
VSMP has been around for years and Samsung has used it in their system architecture. Back when one of the big things was increasing processing power one of the big problems was dealing with the low power core.
It just doesn't make sense to use power when you don't need it. Its like the V8 engines which drop to 4 cylinders at the traffic light to reduce gas consumption.
Sebring5 said:
For a few years now, there has been another core or companion core in smart phones that handles minimal situations. It is a low power core that does not require the resources of the main processing unit. Tegra calls it “4+1” technology which means there are 4 cores running at the same speed and a slower fifth core that can handle most of what you’d be doing on your device. Here is their comments:
http://blogs.nvidia.com/2012/02/technology-formerly-known-as-vsmp-gets-a-new-stage-name-4-plus-1-2/
VSMP has been around for years and Samsung has used it in their system architecture. Back when one of the big things was increasing processing power one of the big problems was dealing with the low power core.
It just doesn't make sense to use power when you don't need it. Its like the V8 engines which drop to 4 cylinders at the traffic light to reduce gas consumption.
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I think there is a difference here as the GS3 does NOT have this feature, you can test this by turning "smart rotation" off then testing the autorotation speed of both phones - which is how it was demonstrated to me. The Note 2 is noticably quicker.
I guess what im saying as in the OP , it is not part of the exynos SoC at all. The microprocessor is a seperate package on the PCB