[Q] Android with a month of battery life? - Android Q&A, Help & Troubleshooting

Hi all!
I'm working on a cool University project here in Russia.
We have to make a mobile device that works for about a month without any charging.
Device should only wake up every day at 23:55 and send POST request to server to tell that "I'm doing science and I'm still alive.".
We've started with an Android device, ZTE racer and installed Cyanogen firmware.
We've made an application that:
enables AIRPLANE_MODE
asks AlarmManager to wake up at 23:55 every day
at 23:55 it disables AIRPLANE_MODE for a minute, aquires a wake lock for a minute
then sends "I'm doing science and I'm still alive." to server
and enables AIRPLANE_MODE again to save battery.
Right now we are getting 5-10 days of battery life.
I suppose that we could extremely increase battery life by:
removing some applications from firmware including "phone" and others
shutting down some services right in kernel sources. (In fact, we just need gprs and nothing else. We don't need Wifi, eccelerometer, GPS, ...)
decreasing CPU speed from application
I have couple of questions:
Is it theoretically possible to have 1 month of bettery life for an Android device? (I know that Kindle have more than 2 months of battery, so why we can't?)
Does anybody have an Android-based book reader? How long could it live in sleep mode and wifi turned off?
If device has no 3rdparty application installed, and it's sleeping in AIRPLANE_MODE... Who could possibly eat battery at that time?!!
Could you please give any kind of advice for our problem?
Thank you very much in advance!

I'd say yes it's possible to get that much battery life... Some suggestions from the top of my head:
Undervolt and/or underclock the processor (like you said), but do this from the kernel, rather than an application.
uninstall any unecessary system apps/turning off services (like you said)
Assuming your script/application is checking the system time of the phone to know when to wake, try having it just run an internal timer instead... I don't know how much battery life that would take, but I imagine that checking against its own timer would save battery vs requesting the time from the phone itself.
Assuming you haven't already, Try having so the display NEVER TURNS ON without physical input (i.e. pressing a button on the phone). The screen is a massive battery drain.

Related

[Q] Insane battery drain after gingerbread update, please advise

Hi, just updated to 2.3.3 stock rom, no flash, using the standard LG upgrade software, from v10q (I believe) to v20g.
I installed no new apps, didn't change a thing on my phone, but now my battery drains in 12h of no use, screen off.
Battery information says the phone never goes to sleep anymore, the blue bar is continuous.
I've tried shutting down running apps using both the phone's built in app manager and Advanced Task Killer, doesn't change a thing.
Searching the forums, I've found people with battery drain, but never the same issue or solution so I'm hoping someone might know something more on my specific situation.
Here's how I use my phone and what apps I generally have running:
Audio Manager Console and Advanced Task Killer are always running, I keep data off most of the time, and turn it on when I use it occasionally (usually no more than a few minutes at a time), no wi-fi, most of the phone usage comes from Think Free Office (at least since I upgraded 2 days ago) and a few minutes of calls. Brightness is always on min.
This is mostly how I generally use my phone all the time (throw in a couple of hours a day of Bluetooth music using the default music player, but this hasn't been the case since the update) and I used to recharge every 2-3 days. Now it's 2 times a day.
Before the upgrade my phone would barely burn any battery in idle (maybe 1-2% during the 12 hours, as opposed to 94% as it currently does)
Battery health seems fine, temperature is around 20-25C
What can I do?
cable36wu said:
Hi, just updated to 2.3.3 stock rom, no flash, using the standard LG upgrade software, from v10q (I believe) to v20g.
I installed no new apps, didn't change a thing on my phone, but now my battery drains in 12h of no use, screen off.
Battery information says the phone never goes to sleep anymore, the blue bar is continuous.
I've tried shutting down running apps using both the phone's built in app manager and Advanced Task Killer, doesn't change a thing.
Searching the forums, I've found people with battery drain, but never the same issue or solution so I'm hoping someone might know something more on my specific situation.
Here's how I use my phone and what apps I generally have running:
Audio Manager Console and Advanced Task Killer are always running, I keep data off most of the time, and turn it on when I use it occasionally (usually no more than a few minutes at a time), no wi-fi, most of the phone usage comes from Think Free Office (at least since I upgraded 2 days ago) and a few minutes of calls. Brightness is always on min.
This is mostly how I generally use my phone all the time (throw in a couple of hours a day of Bluetooth music using the default music player, but this hasn't been the case since the update) and I used to recharge every 2-3 days. Now it's 2 times a day.
Before the upgrade my phone would barely burn any battery in idle (maybe 1-2% during the 12 hours, as opposed to 94% as it currently does)
Battery health seems fine, temperature is around 20-25C
What can I do?
Click to expand...
Click to collapse
Use apn on off widget to kill ur connection when u don't nees it...its a known issue known as the fastdormancy bug, which when u turn off data it makes ye phone awake. Apn on off is the easiest solution know...
Sent from my LG-P500 using XDA App
Thanks, will try, update results

[Q] About Android....

Guys, don't ask me to search again... i really did... and didn't found any answer....
i am new on android.... and it's regarding the battery's life time...
i hope someone give me an answer here....
there're a lot android user saying about advanced task manager, juicedefender, v6 supercharger, cell standby, phone idle.... anyway... i got no answer at all....
few people using ATaskMan and improve their battery life, but few people said it just drain my battery... anyway...i don't see any improvement using that....
i used juice defender to keep the connectivity.... better than keep it all the time...
didn't see any improvement also....
i used setCpu too... keep it low at night.... i don't really know if it works....
all i want is keeping the data on as long as possible.... even on sleep.... to keep apps like viber, whatsapp, im+ and sometime to sync the apps like weather, facebook, twitter and email...
weather, facebook, twitter and email... these apps were set to manual... not automatic....
i don't call and messaging a lot.... just stay on in internet...
i don't play games a lot... maybe few minutes....
so my questions here...
1. did the apps on background really drain up the battery? because they are, who using v6 supercharger didn't have a problem with battery.... and it's not like ATaskMan... it's didn't kill the apps at all.... just manage the background apps...
2. did the widget also drain the battery? some people said so....
3. keep the data on all the time? i read in this forum... they keep their data on.... but, still having their phone more than a day... moveover... some guys get it over 2 till 4 days...
if it's about ROM, it should be same with other, who uses the same ROM...
and if it's about hardware... it should be from the first time i bought this phone....
i just want keep my phone as long as possible with data on.....
anyway.... i still keep tracking what drain my battery the most....
hope someone come with answer for this....
and sorry for my english.....
1. That depends on which apps are running in the background, but when your device is in standby it should go to "sleep", but if you've set some apps to update every 15 minutes, the phone will wake up (without turning the screen on of course) to update them. This will naturally use some battery. And remember that Android can handle all processes itself. You don't need to kill them yourself. That will actually decrease batterylife since the phone has to start the apps again everytime you kill them. A task manager is nice to have if an app is going rogue.
2. Widgets do use battery, and the widgets who are set to automatically update itself uses more battery (Facebook, Twitter, Weather etc.)
3. "This tip is one that seems counter-intuitive, but you can save a lot of wear and tear on your Android phone's battery if you tell it to keep the Wifi radio turned on and connected while the phone is sleeping. Your phone needs a lot of juice to keep pinging those cell towers, and even more to transmit data to and from them. Wifi radios use much less power because of their design, and they don't have to keep searching for a better access point. It's the way cellular data communication was designed, and it's a necessary evil.
But what if you're spending all day (or all evening) in one place, connected to Wifi? If you tell your phone to shut off Wifi when idle, it bounces back to cellular data (be it 2G, 3G, or 4G) and starts sucking down the electrons again when the screen shuts off. That's no good, and easy to fix:
Open the advanced Wifi settings by pressing the menu button, then Settings, Wireless & networks, Wi-Fi settings, and tapping the menu button again. You'll have a choice to either Scan, or go Advanced -- go Advanced.
Tap the Wi-Fi sleep policy entry, and you'll get a pop up dialog with the choices you see in the picture above. Choose Never.
Now even when your phone goes into standby mode, you'll stay connected to Wifi and be able to get mail and messages without turning the cell radio back on and trouncing your battery life. And for the times when you're not in an area with a Wifi connection, just shut Wifi off, either through the menu or with a handy toggle widget. Your battery will thank you for it."
Source: AndroidCentral
Follow the two guides below, this will help you out.
1. Complete Guide to Maximizing Your Android Phone’s Battery Life
2. How to Save Battery Power on an Android
And of course the easiest solution that is often overlooked:
Carry a spare battery and/or charger.
BazookaAce said:
1. That depends on which apps are running in the background, but when your device is in standby it should go to "sleep", but if you've set some apps to update every 15 minutes, the phone will wake up (without turning the screen on of course) to update them. This will naturally use some battery. And remember that Android can handle all processes itself. You don't need to kill them yourself. That will actually decrease batterylife since the phone has to start the apps again everytime you kill them. A task manager is nice to have if an app is going rogue.
2. Widgets do use battery, and the widgets who are set to automatically update itself uses more battery (Facebook, Twitter, Weather etc.)
3. "This tip is one that seems counter-intuitive, but you can save a lot of wear and tear on your Android phone's battery if you tell it to keep the Wifi radio turned on and connected while the phone is sleeping. Your phone needs a lot of juice to keep pinging those cell towers, and even more to transmit data to and from them. Wifi radios use much less power because of their design, and they don't have to keep searching for a better access point. It's the way cellular data communication was designed, and it's a necessary evil.
But what if you're spending all day (or all evening) in one place, connected to Wifi? If you tell your phone to shut off Wifi when idle, it bounces back to cellular data (be it 2G, 3G, or 4G) and starts sucking down the electrons again when the screen shuts off. That's no good, and easy to fix:
Open the advanced Wifi settings by pressing the menu button, then Settings, Wireless & networks, Wi-Fi settings, and tapping the menu button again. You'll have a choice to either Scan, or go Advanced -- go Advanced.
Tap the Wi-Fi sleep policy entry, and you'll get a pop up dialog with the choices you see in the picture above. Choose Never.
Now even when your phone goes into standby mode, you'll stay connected to Wifi and be able to get mail and messages without turning the cell radio back on and trouncing your battery life. And for the times when you're not in an area with a Wifi connection, just shut Wifi off, either through the menu or with a handy toggle widget. Your battery will thank you for it."
Source: AndroidCentral
Click to expand...
Click to collapse
thanks a lot.... i just read all article from androidcentral.... i thought, i found all my answer there... searching in the google doesn't really bring me to the best source... it's just too many choice....
anyway... i got another website to spend my time
febycv said:
Follow the two guides below, this will help you out.
1. Complete Guide to Maximizing Your Android Phone’s Battery Life
2. How to Save Battery Power on an Android
Click to expand...
Click to collapse
thanks for another source...
it's really helpfull...
DirkGently1 said:
And of course the easiest solution that is often overlooked:
Carry a spare battery and/or charger.
Click to expand...
Click to collapse
yeah.... it's the last choice.... carring them is not the problem.... im just kind person who can't leave my stuff behind on the socket... and i spend too much time out there... where doesn't really have socket... except... library... plug the charger for 5 minutes, doesn't really help.... thanks anyway....
The android OS has a built in task manger so using ATK or ATM is actually worse than if you don't.
But honestly rooting has made all of the difference. If you have time for it READ about what it means to root and the how-to's, youtube instrutional videos, etc.... just get your feet wet a lil bit. When/if you feel like it is something that you might be interested in, go ahead and do it. You wont regret it and you will diffidently be able to improve battery life with titanium backup which allows you to freeze apps that you dont need running.
Warning 1) you might become addicted to flashing ROMS... and 2) if you screw up your phone you can't blame anyone but yourself.
petecraig612 said:
The android OS has a built in task manger so using ATK or ATM is actually worse than if you don't.
But honestly rooting has made all of the difference. If you have time for it READ about what it means to root and the how-to's, youtube instrutional videos, etc.... just get your feet wet a lil bit. When/if you feel like it is something that you might be interested in, go ahead and do it. You wont regret it and you will diffidently be able to improve battery life with titanium backup which allows you to freeze apps that you dont need running.
Warning 1) you might become addicted to flashing ROMS... and 2) if you screw up your phone you can't blame anyone but yourself.
Click to expand...
Click to collapse
1. I did already.... waiting the new rom everyday....
2. Yes it is....
I need root to back up my phone... and it's already rooted... and there're a lot useless program coming with stock rom... need root to clean it also....
Sent from my LG-P920 using XDA App
at least for my phone: regarding setcpu, you can raise the minimum frequency, increasing performance while hardly affecting battery life (at stock i had 245/600; now i have 480/600). turns out that if you set the minimum frequency low, it will take some juice to ramp the cpu back up
just a little tip
Just wanted to add: besides titanium backup, I'd also recommend gemini app manager and better battery stats. You can use gemini to edit an app's autorun permissions (ie, automatically starting at boot) for those apps you don't, can't or shouldn't uninstall/freeze. If you're having issues with your phone not sleeping better battery stats will help you identify what's keeping your phone awake.
Lastly, there is only so much you can do to optimize your battery life. In the end you're going to have to sacrifice some functionality for better battery life or vice versa. You just need to find the right balance you can live with.
What is the longest running time did you had on your phone? I reckon batteries are getting thinner and thinner and will not last long.
Apps are there to help you avoid manual work. If you switch of automation on all the apps then you will have to spent time and do it all manually and on the other hand how much life will you save lets say %15. Not worth it!
Best solution is to stick your handset to the charger while you are going to sleep!
sweetnsour said:
at least for my phone: regarding setcpu, you can raise the minimum frequency, increasing performance while hardly affecting battery life (at stock i had 245/600; now i have 480/600). turns out that if you set the minimum frequency low, it will take some juice to ramp the cpu back up
just a little tip
Click to expand...
Click to collapse
i set it 300/300 at night... it's from 00.00 til 06.00 which i don't touch it.... i don't know, if it is a good idea.... i guess, background apps wouldn't using cpu so badly.... would it?
arsalan.haqs said:
What is the longest running time did you had on your phone? I reckon batteries are getting thinner and thinner and will not last long.
Apps are there to help you avoid manual work. If you switch of automation on all the apps then you will have to spent time and do it all manually and on the other hand how much life will you save lets say %15. Not worth it!
Best solution is to stick your handset to the charger while you are going to sleep!
Click to expand...
Click to collapse
im trying tasker right now... 15% fair enough for me.... without losing data....
i am almost 12 hours out there every day.... i wanna figure out, how to spare the battery life... cause i wanna buy tablet.... which consume more battery than a phone....

[Q][Solved] How to debug "Android-System" power consumption

Hi everyone,
I've done very much try and erroring to find out which app is draining my battery and if it's really neccessary.
As you can see on the attachment, it looks really nice already. The only thing which drives me crazy are those long and often "Aktiv" (Awake) parts. I couldn't find any information on the SDK pages.
My Phone seems to be very often Awake while in standby. I can't understand why it has to wake up that often. Am I right, that this "Awake" means, that the cpu is running (not in sleep mode)?
Is there any way to log which software is waking the device up?
Greetings
Chris
Yep, "awake" means that cpu is running. Try Badass Battery Monitor, it has a list called AppSucker, that lists the apps by battery consumption
Thanks. That is exacly what I was looking for.
Now I'm still sure, that there is somethink wrong with the battery consumtion. As you can see on the attachment, "Android-System" takes 2 hours(!) for some stupid things.
These are the datas for one night (it was a short one ) The phone wasn't used at all. Is that normal? I mean, thats nearly 30% of the time. Okay, the total capacity loss seems okey, but the phone hast absolutly nothing to do. Except for some interrupts of from the baseband and some cronjobs maybe. But that doesn't need 2 hours.
Any suggestions what courses these long awake times? Or another way to debug this?
Thanks
Chris
Android-system, huh? Seems like you have a wrong config, or a service is keeping awake the CPU...
Sorry, I dunno other way to debug it, but you already tried to calibrate your battery? (let that your battery runs out, charge it fully and, without unplug the charger, go to Recovery >Advanced >wipe battery stats. Unplug and reboot).
Yep, that was the first ding I did.
I'm running IceColdSandwich - 7.4 - AOKP STRIPPER EDITION. Maybe this is some kind of bug.
Maybe someone have another idea how I can debug this. Nevertheless thanks for helping.
You should check to see if Sync is turned on. This will cause the phone to wake up to contact any accounts you have set up to sync... I would suggest setting sync to off unless wifi is available.
On my rom (Gingerbread base) the wifi is turned of when the screen is off, which will make sure that google will never try to sync while the phone is idle.. The downside you will have to wake the phone in order to receive emails and stuff via wifi, and if not on wifi you will have to check your email manually.
I think I found it. Badass Battery Monitor showed that "Google Backup Transport" is part of Android-System, so I removed it. I didn't use it anyway.
My phone is not crashing, I still runs smoothly. The keep-awake time shrinked to 30m during 7h (including short uses). That seems totally legit for me.
Thanks for helping
Chris

My Galaxy S3 Battery Life Sucks Please Help! 15% After Only 7 Hours.

My Galaxy S3 Battery Life Sucks Please Help! 15% After Only 7 Hours.
I’ve been having this same problem sense I got my phone about 2 months ago but now I’m finally just tired of it! My phone is rooted, using the stock ROM.
What I do to help battery life:
- Every morning I hold the home button and kill multitasking and kill all running aps in the background then I open autokill which automatically kills running apps in the background that are not needed.
- I have power saving enabled
- Easy Battery Saver running
After 7 hours of use I’m already at 15% and through out the day I barley use my phone. Its like this just about everyday. I use my phone about an hour of the entire day of web surfing and Facebook usage etc. The rest of the day I’m only texting and maybe taking 3 or 4 phone calls that last 10 mins. How much battery could that possibly take? A flip phone can do that and last 3 days..
I used my iPhone 4S much more during the day then I do the galaxy S3 because the S3 has terrible battery life.
On my iPhone I would have about 22% after everyday of using it for 11 hours down time = sleep and 4 hours of usage = texting, , phone calls, web surfing, games etc.
I don’t play games or watch movies on my S3. Only texting, instagram, facebook, websurfing which is about an hour a day usage. Also a couple minutes of GPS usage on some days.
What can I do to fix this? I don’t want a bigger battery that will make my phone any thicker.
I have pictures below showing usage through out the day and usage under battery.
Please help!
Thanks!
You screen is using most of your battery. Check the brightness levels. Are they on max or close to it? Switch it to auto
Sent by GT-I9300 SuperNexus
omgbuffguy said:
You screen is using most of your battery. Check the brightness levels. Are they on max or close to it? Switch it to auto
Sent by GT-I9300 SuperNexus
Click to expand...
Click to collapse
My brightness is always set to lowest possible expect while walking from to and from class. Ill post a little more pics maybe these can help figure out the problem problem?
zak9494 said:
My brightness is always set to lowest possible expect while walking from to and from class. Ill post a little more pics maybe these can help figure out the problem problem?
Click to expand...
Click to collapse
Oh thats easy.
You're phone is always "Awake". It doesn't go into Deep sleep like everyone elses. If you take a look at the first picture you linked with the graph, it shows that the phone is always AWAKE.
For comparison, I have attached mine as a reference but something is DEFINITELY keeping your phone awake.
Aegishua said:
Oh thats easy.
You're phone is always "Awake". It doesn't go into Deep sleep like everyone elses. If you take a look at the first picture you linked with the graph, it shows that the phone is always AWAKE.
For comparison, I have attached mine as a reference but something is DEFINITELY keeping your phone awake.
Click to expand...
Click to collapse
From pics ive posted can you tell which apps are not letting it go into deep sleep?
zak9494 said:
From pics ive posted can you tell which apps are not letting it go into deep sleep?
Click to expand...
Click to collapse
Can't really see anything that stands out per say...
If you see anything on that thread or any apps on your phone that you think could be keeping it awake, just uninstall them. I would suggest trying to remove them a few at a time just to narrow down which ones are keeping the phone awake.
Also, apparently this app helps a lot (https://play.google.com/store/apps/details?id=com.bvalosek.cpuspy) and Better Battery stats should give you a better idea of which apps use the CPU while your phone is trying to sleep.
Oh and remove any task managers you have installed.. Those tend to be the worst offenders.
One last thing, found this on another forum:
- Don't use an automatic task killer--not even the one that comes with the phone. Reboot your phone and look at what's running. If anything that you've installed is running and there's no reason for it, then uninstall it and find an alternative that behaves. Ignore any stock apps that run on boot as I've found them to be more or less benign.
- Weather widgets, live wallpapers, news/social feeds, any app or service that you use that runs--do without it if you can. If you can’t do without it, lengthen it’s refresh time.
- Don't use antivirus
- Set your WIFI sleep policy to never. The default is "turn off when screen turns off". This will cause the wifi to reconnect every time you open the phone. From any Home Screen select Menu/Settings/Wireless & Networks/ and then use the Menu button to see some new options - select Advanced. Then select Wifi Sleep Policy and set it to Never. Home key to return to Home Screen.
- If you have access to wifi, leave it toggled on as it is more efficient than 3G. Wifi consumes less battery power than 3G.
- I leave GPS toggled on too by the way. Apps use it as needed. When I'm done with Maps or an app that uses it, I'm sure to return to the home screen so GPS can stop. Under wireless settings turn on "Google location services" so that an app is able to use network resources to get your location instead of GPS. I have "VZW location services" turned off--don't know why that option is even there. By the way, I increase the speed of voice output > text to speech > speech rate because I like the directions to get spit out faster. That saves a bit of battery. Turning off the display and just listening for directions help. Also, often I just get the directions and then exit back to the home screen: GPS uses so much battery I try to get it over with ASAP.
- Under Accounts, click on any account listed and turn off sync for any items that you're not interested in syncing. For example, Google Books if you don't use it. Don't use Backup Assistant--I prefer syncing my contacts with Google. You don't need both. Also go into your contacts > menu > display options > backup assistant > UNCHECK. Also do contacts > menu > more > settings > contact storage > and select your Google account and "remember this choice"
Are you on the 3G network a lot or weak signal areas? Is your phone hot around the bottom? If yes to both, most likely it's because of the system attempting to find a better signal. When I was swapping out my SIMs, in various countries, I only have 3G network and my battery fully drains in 7hrs at idle. The only way i can go a whole day is to place my phone into airplane mode or wifi only to conserve the battery.
my battery runs at-most 13 hrs........................
zak9494 said:
My Galaxy S3 Battery Life Sucks Please Help! 15% After Only 7 Hours.
I’ve been having this same problem sense I got my phone about 2 months ago but now I’m finally just tired of it! My phone is rooted, using the stock ROM.
What I do to help battery life:
- Every morning I hold the home button and kill multitasking and kill all running aps in the background then I open autokill which automatically kills running apps in the background that are not needed.
- I have power saving enabled
- Easy Battery Saver running
After 7 hours of use I’m already at 15% and through out the day I barley use my phone. Its like this just about everyday. I use my phone about an hour of the entire day of web surfing and Facebook usage etc. The rest of the day I’m only texting and maybe taking 3 or 4 phone calls that last 10 mins. How much battery could that possibly take? A flip phone can do that and last 3 days..
I used my iPhone 4S much more during the day then I do the galaxy S3 because the S3 has terrible battery life.
On my iPhone I would have about 22% after everyday of using it for 11 hours down time = sleep and 4 hours of usage = texting, , phone calls, web surfing, games etc.
I don’t play games or watch movies on my S3. Only texting, instagram, facebook, websurfing which is about an hour a day usage. Also a couple minutes of GPS usage on some days.
What can I do to fix this? I don’t want a bigger battery that will make my phone any thicker.
I have pictures below showing usage through out the day and usage under battery.
Please help!
Thanks!
Click to expand...
Click to collapse
Welcome to smartphones. The calls alone will drain the battery. Seven hours isn't horrible for all that. It isn't a flip phone.
why your phone is always awaking?
mattwarr said:
Welcome to smartphones. The calls alone will drain the battery. Seven hours isn't horrible for all that. It isn't a flip phone.
Click to expand...
Click to collapse
maybe you have to flash a new rom
If you want, you could try to flash a custom ROM. I had the same problem that you have, and I flashed Revolutionary S5, and now my phone lasts minimum two days with the same usage, maybe a bit more.
Too bad Tony Stark hasn't gotten involved
chujung24 said:
maybe you have to flash a new rom
Click to expand...
Click to collapse
Titanium Backup will assist a little bit. When you do a backup of an apk it will tell you if the application is running. You can find all kinds of sneaky apps this way. Many of them were ones I didn't use and didn't really want. That will probably yield minimal results, though. Keeping a black background helps on my S3. Colors, widgets, and live backgrounds will drain the battery. Turn off the menu and back key lights. You know the buttons are there. Turn off all haptic feedback and key press sounds. Of course, try to lower the screen brightness. Leaving my data and sync on hasn't caused me any problems, but you will save some battery by turning them off when not in use. I also read a post about hidden menu options that ran even when they weren't meant to. That was an issue that destroyed battery life. Some ROMs also have settings for data connection type. You'll save power by telling your phone to not worry about gaining signals like 4g, 3g, etc. As other people have said, try out some ROMs that make battery life a big priority.
it CAN get better
if you want to have a good battery life, use custom rom and kernel (or a modified stock like omega rom), watch out for wakelocks + apply these settings:
http://forum.xda-developers.com/galaxy-s3/general/guide-complete-guide-battery-saving-t2495276
also, interesting info here:
http://forum.xda-developers.com/galaxy-s3/general/post-battery-stats-t2621654

Android and battery

I love Android.
I think the customization is great, and since v4 it's smoother and feels more responsive.
There are LOTS of apps and it's better than iOS.
But i'm sick of the battery issues.
I've always loved trying new features, ROMs, apps, hacks and whatever.
I now have SGS3 and it's my third android device, and i've installed ROMs dozens of times, even on my friends' devices.
One thing that always kept me alert is the battery life - the maximum I can get from my battery is around 30 hours with my usage - 1/5-2 hours of screen, ~45 minutes talk, lots of standby.
But every now and then, my girlfriend, my dad, my aunt or my friend ask me 'why does my battery drain so fast?'
Sometimes its google maps.
Sometimes its mediaserver/media scanner
Sometimes - and only I can see it cause they are not familiar with tools like BBS, it's gsf (Google Services Framework).
The point is, when you have an Android device, you need to check the battery stats every now and then to make sure nothing is unusually heavy on the battery.
I am currently experimenting with ParanoidAndroid and AOKP, which are faster and more responsive than omega/stock.
Yesterday i went to sleep (6 hours) with 25% battery (after it lasted 15 hours) and I turned off the data connection and the wireless connection.
I woke up after 6 hours (lucky..) and I saw my phone if off. after I connected it to the charger and turned it on I saw mediaserver decided to wake up in the middle of the night, after It almost did nothing during the day, and worked for 5.5 hours until the battery died!
Today I unplugged my phone and in 1 hour of standby 10% of the battery were gone, I checked what happened using BBS and saw gsf again (that GTALK_SYNC whatever wakelock) was draining battery, after I thought I fixed it yesterday when I disabled app data and browser sync in the google account sync options). I rebooted and now it seems ok again, the phone is back to ~70-80-% sleep.
I want to emphasize that I don't like all the stupid battery tips that tell me to castrate my phone:
turn off wifi when it's not needed, turn down the brightness, lower the screen timeout, disable sync (wtf? but its a smart phone, I WANT push notifications!) and that sort of things.
I KNOW I can get >24hours of battery without disabling the basic features of my phone.
And the draining battery processes that I mentioned earlier can suddenly appear even in a stock ROM, so I don't think it's PA or AOKP's fault.
What I want is that google will finally build a supervisor entity that will check what causes an unusual battery drain, check if it makes sense, and disable that cause!
It's absurd that google maps application comes with default 'enable location reporting' that constantly drains your battery and for what?? google maps doesn't run in the foreground, why the hell will I want that background location reporting draining my battery? and if so, why do you put this option enabled BY DEFAULT? The average user doesn't know this sort of stuff, and get only 10 hours of battery out of a device that should ideally provide ~30 hours!!!
Just wanted to let it out of my system...
And to get useful battery tips if any...

Categories

Resources