Develop Bugs

Constant 4G and battery life

So, I'm fairly certain it's a well-established fact that the constant switching from 4G to 3G drains a lot of battery on our phones since 4G isn't a widespread service yet. I have also heard that 4G is a more efficient antenna and if you have a constant 4G connection, the battery life isn't impacted much. I was wondering how much of this is true- I live in Atlanta, which was one of the first cities to get Verizon's LTE service, and as a result, I have a sold 3-4 bar signal of 4G at all times. I go to school downtown, work in the metro area, and live in the metro area. Since I got the phone, I've just left it on CDMA, as the speeds are fine for me and I typically get 30 hours or so of battery life with data and sync on (and WiFi, when available). Would switching to 4G change that number drastically?
Thanks!
Also, a side question: I leave GPS turned on as that only polls when an application calls for it, but I've left Google's Location Services off. Is there a real need to leave that on? With GPS only, I tend to get an immediate reading with wonderful accuracy.

I'm calling bs. Please post a screenshot of your battery life of 30+ with gps and 3g all day.

rabaker07 said:
I'm calling bs. Please post a screenshot of your battery life of 30+ with gps and 3g all day.
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I'd be happy to post a screenshot the next time I run my phone down. As I said, GPS doesn't drain your battery at all unless you're using Maps constantly, so that isn't really a major factor for me. Also, I DO have the extended battery.
Also, I can't help but note how this doesn't really relate to the content of the thread at all.

rabaker07 said:
I'm calling bs. Please post a screenshot of your battery life of 30+ with gps and 3g all day.
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Not at all what the topic was about but it's easily possible. I've gotten 30 hours on 3G no problem. Right now I'm at 20% after 20 hours with moderately heavy usage. Close to 4 hours of screen on time.
As for the topic, best way to find out is to try it. Couldn't tell you for certain one way or the other.
Sent from my Galaxy Nexus using XDA App

hotleadsingerguy said:
Not at all what the topic was about but it's easily possible. I've gotten 30 hours on 3G no problem. Right now I'm at 20% after 20 hours with moderately heavy usage. Close to 4 hours of screen on time.
As for the topic, best way to find out is to try it. Couldn't tell you for certain one way or the other.
Sent from my Galaxy Nexus using XDA App
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Click to collapse
Right, I suppose that would be the easiest approach. I just fear starting my day out on 4G and then realizing that my battery is shot when I really need it. Though, I could always just turn data off if I see my battery draining super quick.

[Q] Constantly in a bad reception zone

When I'm at school (5 days a week) most of my classes are in a building where I do not get a lot of reception, aka, my battery gets killed by the phone to keep up the signal. I do get reception, around 1-2 bars, but that still drains the battery extremely fast. Is there any app or something that I can do to help reduce the amount of battery drain?
I don't want to put the phone into air plane mode because I can still send and receive text messages, but it's just very slow.

Have you tried putting it in cdma only mode?
Sent from my Galaxy Nexus using XDA

You could save a lot of battery life by either connecting to a wifi hotspot (if available) or by turning off background data. The problem your phones having is that it has to turn the gain way up on its cellular radio in order to transmit and receive data. By reducing the amount of background data usage (or off loading it to another network with better signal--i.e. wifi) you'll save a lot of juice.
If you can't do either, there are some things you can do with Tasker to reduce data usage to windows of time instead of always on. May be something to consider.
- chris

isinisterx said:
When I'm at school (5 days a week) most of my classes are in a building where I do not get a lot of reception, aka, my battery gets killed by the phone to keep up the signal. I do get reception, around 1-2 bars, but that still drains the battery extremely fast. Is there any app or something that I can do to help reduce the amount of battery drain?
I don't want to put the phone into air plane mode because I can still send and receive text messages, but it's just very slow.
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Click to collapse
Drop it into 2G only or connect to WiFi.
taappel said:
Have you tried putting it in cdma only mode?
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Click to collapse
He's in Canada, so using the GSM model.

Give juice defender a try. It used to almost double the battery life on my old X10 when I worked in a building that I could only get 1 bar at best.
Sent from my Galaxy Nexus using xda premium

GreatBigDog said:
Give juice defender a try. It used to almost double the battery life on my old X10 when I worked in a building that I could only get 1 bar at best.
Sent from my Galaxy Nexus using xda premium
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JD sucks on the Nexus, unless it has gotten an update since last month.. WiFi doesn't want to reconnect. I've seen others say the same thing.

WiredPirate said:
JD sucks on the Nexus, unless it has gotten an update since last month.. WiFi doesn't want to reconnect. I've seen others say the same thing.
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yessss someone else with the wifi problem.when in like a perfect wifi signal zone, my friends gnex connect oerfectly and mine just says saved, wont connect to the networj
Sent from my Galaxy Nexus using xda premium

Have a few questions :)

I might be buying one of these bad boys. And i have a couple of questions.
1. How is the GPS on this device? Does it lock on pretty quick? Also im talking about stock, not with any tweaks or anything added.
2. How about signal? Does it get good signal? Like if T-Mobiles map says it has excelent 3g coverage will i get that inside a building?
3. Hows the camera? I heard it was the best and looking at pics taken from it it looks pretty spectacular. But nothing speaks more then users opinions
EDIT: missed one 4. Under moderate use, texting throughout the day, hows the battery life? Also hows it with heavy use?
Thanks guys for your time!

Battery sucks with any use, GPS locks on pretty quick(15 sec or so)
The camera is great, by far the best I have seen on a cell phone and just as good as our point and shoot.
I always have good signal on T-Mobile
Sent from my SGH-T989 using xda premium

beedo said:
Battery sucks with any use, GPS locks on pretty quick(15 sec or so)
The camera is great, by far the best I have seen on a cell phone and just as good as our point and shoot.
I always have good signal on T-Mobile
Sent from my SGH-T989 using xda premium
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Click to collapse
Thanks! I figured battery life wouldnt be too good considering its using the Super Amoled + display. I was planning on buying an extended battery anyhow. About how long does it last? Like from what time do you unplug it till it reaches zero?

I personally believe the battery to be fairly standard, but definitely not horrible. I keep my display brightness at probably 75% and it lasts me ALL day and usually needs charging at around 10. Definitely manageable, and this is heavy to moderate use; ALOT of texting, maybe 30 minutes of gameplay, live wallpaper, wifi on for about half the time, AND this is on AOKP ICS ROM so battery life would be considerably better on a stock ROM or even one that allows under-clocking. Hope this helped!

Honestly I think battery on life on stock is great well at least for me....with modetate to heavy use...that including alot of Web browsing, text, calls....it last me a good solid 12 hrs. best battery life I've had on any smart phone I've owned. This phone is just amazing in every aspect the only phone I think that is better than this is the HTC one X. obviously using GPS and stuff is going to drain it more so it depends on how u use it..
Sent from my SGH-T989 using xda premium

elesbb said:
I might be buying one of these bad boys. And i have a couple of questions.
1. How is the GPS on this device? Does it lock on pretty quick? Also im talking about stock, not with any tweaks or anything added.
2. How about signal? Does it get good signal? Like if T-Mobiles map says it has excelent 3g coverage will i get that inside a building?
3. Hows the camera? I heard it was the best and looking at pics taken from it it looks pretty spectacular. But nothing speaks more then users opinions
EDIT: missed one 4. Under moderate use, texting throughout the day, hows the battery life? Also hows it with heavy use?
Thanks guys for your time!
Click to expand...
Click to collapse
The GPS on this phone has never failed me.
As far as signal. If its good near you then you will be fine. I get 4G in my apartment and do over 20 mbps dl speeds inside.
I think the Camera is better than my wifes Sensation..
I am a moderate to heavy user. I mean Texts, Calls maybe a game lots of web with usually over 2.5 hours of screen on time and on stock I was doing 13 or 14 hours..
Rooted, under clocked, and undervolted I have went over 20 hours.

PJcastaldo said:
The GPS on this phone has never failed me.
As far as signal. If its good near you then you will be fine. I get 4G in my apartment and do over 20 mbps dl speeds inside.
I think the Camera is better than my wifes Sensation..
I am a moderate to heavy user. I mean Texts, Calls maybe a game lots of web with usually over 2.5 hours of screen on time and on stock I was doing 13 or 14 hours..
Rooted, under clocked, and undervolted I have went over 20 hours.
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Click to collapse
Thats impressive! 20 hours! Woah! thanks for that i'll def consider making a profile in setCPU or tasker or even make my own apk which will under clock and undervolt when i want it
I have a second question though, what is the difference between the Samsung Galaxy S II (T-Mobile SGH-T989) and the Samsung Galaxy S II X (SGH-T989D)

Poor Battery Life

Hi All,
My Gnex 9250 has a poor battery life, My brother has the same phone and his battery last much longer(with 3g) than mine. Please help.
1130 AM - Battery 100%
1 and half hour Music(Player Pro) - Not much screen activity(with 2G enabled)
2G on for 6 hours, Pretty long texting.
about 45 Minutes of Browsing(2g)
10 Mins on Voice calls.
No Widgets.Background apps = Swiftkey,Go launcher(No theme),Profile scheduler.
By 12am battery was 20%
Screen brigntness is VERY low so its not that, Its about 20%.
Phone is about a month old.
Thanks in advance.
EDIT - 4.1.1(No available updates)

The fact your battery goes over 12hrs seems it's not too bad with moderate use. And who knows if your bro uses his as much as he says? If you want to compare then look at his battery stats in settings next to yours.
Try a different ROM? Kernel?
Sent from my Galaxy Nexus using Tapatalk 2

untruestory said:
The fact your battery goes over 12hrs seems it's not too bad with moderate use. And who knows if your bro uses his as much as he says? If you want to compare then look at his battery stats in settings next to yours.
Try a different ROM? Kernel?
Sent from my Galaxy Nexus using Tapatalk 2
Click to expand...
Click to collapse
Thanks for your reply.My brother does use as he said, Ive seen his battery stats, uptime was 1 day 9 hours(14% then). He doesnt text half as much as I do, but his voice calls are much more than mine. Also hes on 3g thats a bigger battery hog than 2g. Not too keen on changing the Kernel/Rom.
Could it be SwiftKey and Go launcher? He doesnt use either of them.
Thanks again.

sl4y3r88 said:
Hi All,
My Gnex 9250 has a poor battery life, My brother has the same phone and his battery last much longer(with 3g) than mine. Please help.
1130 AM - Battery 100%
1 and half hour Music(Player Pro) - Not much screen activity(with 2G enabled)
2G on for 6 hours, Pretty long texting.
about 45 Minutes of Browsing(2g)
10 Mins on Voice calls.
No Widgets.Background apps = Swiftkey,Go launcher(No theme),Profile scheduler.
By 12am battery was 20%
Screen brigntness is VERY low so its not that, Its about 20%.
Phone is about a month old.
Thanks in advance.
EDIT - 4.1.1(No available updates)
Click to expand...
Click to collapse
there are lots of thing that can affect your battery life one of it is the kernel ur using.
I already have this problem before.
i've tried lots of custom rom. the only custom rom that solve this battery issues is from Android Revolution HD 7.0.0
from this: http://forum.xda-developers.com/showthread.php?t=1361348

imo the best battery/performance kernel out there is franco's. try it, battery will be 2x to 3x longer.
if you like to fool around with what's chewing battery you can get better battery stats and it will tell you what keeps your phone from going to sleep. sometimes nothing, sometimes crappy app that messes things up
good luck!

Thanks to all for your replies.
Guess that 12 hours is not bad afterall right? Seems like that from the first reply I got.
Unfortunatly I have no time to re-flash a differnt ROM/Kernel. But thanks for all reccomendations.

sl4y3r88 said:
Thanks to all for your replies.
Guess that 12 hours is not bad afterall right? Seems like that from the first reply I got.
Unfortunatly I have no time to re-flash a differnt ROM/Kernel. But thanks for all reccomendations.
Click to expand...
Click to collapse
its a smartphone 12 hours is good imo

Buy the Samsung extended battery. It helps a lot.
http://www.ebay.com/itm/Genuine-Sam...462058?pt=PDA_Accessories&hash=item1c222d0cea
http://www.ebay.com/itm/150802739042?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649

sl4y3r88 said:
Thanks for your reply.My brother does use as he said, Ive seen his battery stats, uptime was 1 day 9 hours(14% then). He doesnt text half as much as I do, but his voice calls are much more than mine. Also hes on 3g thats a bigger battery hog than 2g. Not too keen on changing the Kernel/Rom.
Could it be SwiftKey and Go launcher? He doesnt use either of them.
Thanks again.
Click to expand...
Click to collapse
You say that your brother doesn't text as much as you but he uses voice calls more. Remember that when you're texting the screen is on and that has a big impact on battery life.

There's not a kernel, ROM, or flying saucer out there that can triple battery life Just saying. People get fanatical about certain ROM/kernel combos. The usual suspects are leaving on things you don't need and on occasion an app. People claim that different things work better on different phones but I think it's a bunch of crap. Much of what you hear is placebo.
I'm a fan of Trinity myself
Sent from my Galaxy Nexus using Tapatalk 2

whpsnp said:
You say that your brother doesn't text as much as you but he uses voice calls more. Remember that when you're texting the screen is on and that has a big impact on battery life.
Click to expand...
Click to collapse
untruestory said:
There's not a kernel, ROM, or flying saucer out there that can triple battery life Just saying. People get fanatical about certain ROM/kernel combos. The usual suspects are leaving on things you don't need and on occasion an app. People claim that different things work better on different phones but I think it's a bunch of crap. Much of what you hear is placebo.
I'm a fan of Trinity myself
Sent from my Galaxy Nexus using Tapatalk 2
Click to expand...
Click to collapse
Both valid points.
Sent from my i9250

[Q] Is there ANY way to save battery without rooting my device?

Hi XDA members and developers. I just got my Samsung Galaxy Note 2 International Version. 3 weeks old currently. I don't want to void any warranty itself. Is there any way folks? I lose 2% and hour just standby. and 10% and hour in Wi-Fi use.
WiFi - Moderate Use
SMS - Moderate Use
Cellular Data - OFF and GSM Only mode
PowerSaving Mode
Sync Off
Carrier - Sun Cellular Philippines
I posted my current device condition and status and downloaded application.
Please help me. I believe that SGN2 is a beast when it comes to battery.
Or If root is the solution. Give me tips.

There is nothing wrong i can see in your image 1. You have kept screen on almost half the time. it was even not fully charged (appr 95%) and still after 2 hrs of use it is about 83%. 12 % use with nearly 1 hr screen on time is normal when you have poor network.
Look to network, hardly you had 5-10 min good network, otherwise all the time you have it poor coverage, which is most juice drainer.

Thanks dr. Ketan
dr.ketan said:
There is nothing wrong i can see in your image 1. You have kept screen on almost half the time. it was even not fully charged (appr 95%) and still after 2 hrs of use it is about 83%. 12 % use with nearly 1 hr screen on time is normal when you have poor network.
Look to network, hardly you had 5-10 min good network, otherwise all the time you have it poor coverage, which is most juice drainer.
Click to expand...
Click to collapse
Dr. Ketan thanks for that advice. I tried other carrier and it is now good and mostly green network. You're the best. I read all your posts and it is very helpful. A thanks meter to you. If ever I will root I will look to your post in How to root Galaxy note 2. Thank the doctor.
And last question. How about in my image 2 which is the stats of wakelock detector? Is that normal? the 1013? It bothers me a lot every time I look to wakelock. I know rooting can improve battery life but it's not my option right now. Thanks!!

warlycastro said:
Dr. Ketan thanks for that advice. I tried other carrier and it is now good and mostly green network. You're the best. I read all your posts and it is very helpful. A thanks meter to you. If ever I will root I will look to your post in How to root Galaxy note 2. Thank the doctor.
And last question. How about in my image 2 which is the stats of wakelock detector? Is that normal? the 1013? It bothers me a lot every time I look to wakelock. I know rooting can improve battery life but it's not my option right now. Thanks!!
Click to expand...
Click to collapse
Your wakelock are normal. Don't worry about it. As dr.ketan said your network drains more.
Sent from my GT-N7100 using Tapatalk 4 Beta

Turn off the phone.

You have kept screen on almost half the time.

There is a battery saving option in the S Pen menu.

He he. Most smartphones can never hope to drop only 10% in an hour of screen on time. My i9505 drops that much in 30 minutes.
Sent from my GT-N7100

Thanks MBariya!
MBariya said:
Your wakelock are normal. Don't worry about it. As dr.ketan said your network drains more.
Sent from my GT-N7100 using Tapatalk 4 Beta
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Click to collapse
Okay sir thank you for that relieving reply. LOL God bless Sir!
Thanks

Thanks NightHawkUndead
NightHawkUndead said:
Turn off the phone.
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Click to collapse
I need to catch important calls from work so I don't want to turn off the phone. But anyways thanks for replying!! :good:

THanks dr.m0x
dr.m0x said:
He he. Most smartphones can never hope to drop only 10% in an hour of screen on time. My i9505 drops that much in 30 minutes.
Sent from my GT-N7100
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Click to collapse
Hehe! Screen on + WiFi + Poor signal. I changed my carrier and the battery life improves. Disabled all stock apps i'm not using etc. Well thanks for replying Bro! :good::laugh:

Thanks!
(InsertNameHere) said:
There is a battery saving option in the S Pen menu.
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Click to collapse
Yes sir already did that. Thanks anyways!:good: