4G/3G only vs Standby 2G - Samsung Galaxy S (4G Model)

Hi,
I've searched around on the SGS4G forums, but haven't seemed to find a definitive answer to this question.
If you live in an area where you get good 3G/4G coverage, is it worth having power save options switch your phone to 2G when you turn off the screen for a while (e.g., AOKP's power saver option to switch to 2G after screen off)? As I understand it, turning off that connection will drain additional battery versus just continuing to use the 3G/4G signal that the phone is on. Are the battery use benefits of 2G more than the power cost to switch it off?
If anybody has done an analysis of this, I'd be glad to hear your results. From my own personal experience, it seems like I get slightly better battery life sticking with 3G/4G instead of turning it down to 2G when on standby.
Cheers

FB used the power save recently and got 28hours on a single charge. I think he lives in a decent coverage area.

Was he using a standard battery? That's an impressive amount. Even when I was back on a fresh Octane install and running only essential apps, I got 20 hours at best.

I got 28 hours but only had 34 mins of screen on time. I wasn't using my phone at all, but had 53% battery left when I told eollie that.
Normally with about an hour's screen on time I'm at 50% battery. I tend to get a little over 2 hours of screen on time on a full battery, WITHOUT power saver.
I wasn't able to continue using power saver recently since I'm working on the AOKP update but shh! Keep this between us.
EDIT
I get around 1-2 bars on 3/4G
I get 3-4 bars on Edge

I think so.

Here's what you can do if you leave it on your desk with the sim card out. lol Still at 58%.

Haha, yeah, figured. Well, normally I get 3-4 bars on 3/4G, and leaving it on my nightstand in the morning, I get about 1-2% drain per hour if I don't touch it at all. So I can definitely see getting days of battery on just standby with nothing running.
AOKP update. Yeus. Can't wait!

Another good tip for battery life, if you'd like to know it, is to have a single colored dark background. Even better if your icons are darker. If you use a totally black background, with dark-colored icons, it can really help conserve battery. Well, I don't know if it's anything substantial, but it will help.

There isn't much "factual" information out there on 2G vs. 3G/HDSPA power consumption that I could find.
http://blog.famzah.net/2010/05/24/2g-gprs-vs-3g-umts-connection-battery-usage-on-mobile-phones/ suggests that the idle consumption is comparable between 2G and 3G on their specific phone. It also suggests that 3G, when you are transferring data, consumes less energy than 2G since the data can be transferred in a significantly shorter period of time.

Related

[Q] New GS 4G user. Help with battery problems.

Love the phone. Only complaint that I have is the battery life. I only get about 10 hours of normal use before it dies.
I have it rooted and I have installed Juice defender and setCPU. I have no idea really how to use either of these apps though.
Can anyone please help me to install and set up the apps that I need to get the best power/battery life ratio for this phone?
Thanks.
A really helpful tip is to use black backgrounds. This reduces the amount of pixels on the screen requiring power on the Super AMOLED display, and will improve battery life significantly. Tower reception is also a big one, just turn off mobile data when you get to a low signal area.
I suggest turning down the brightness to the lowest indoors and then bringing it up a little outdoors. 10 hours is really good compared to the 4 hours I got on my old 4g.
Sent from my SGH-T959V using XDA App
I second the black background.
I also installed widgetoid, created a widget with a shortcut to the mobile network settings.
I have Network Mode set to GSM only (Edge Network) throughout the day. This is fine to keep my email syncing and for phone calls. If I know I'm going to start browsing the internet/ streaming music/ etc then I go and set the network mode to Auto to allow 4G connections.
With a few phone calls and a little bit of internet usage I still had about 60% battery life left after 12 hours off the charger.
juice defender works wonders. Set profile to extreme. Choose carefully and let app do this rest. It auto shuts off data when not using 4 apps. I have been off charge 9:40 mitutes with 79% battery remaining. I've been on the market made a few phone calls, browsed the internet and getting and receiving text + emails coming in. Have settings GSM only until I need 4G speed. I don't need a charger because I get through the day easily.
Thanks
I just wanted to say thanks everyone for the tips! I know more is coming from other users but i'm new to android i switched from Windows Mobile 6.5 and android is better so far or atleast for the week i have had this device. i was getting upset with the battery life and always taking my charger with me(i never had to do that with my custom Rhodium. the black backround idea does work very well. I have also found if you set your backlight timeout to 1 min it helps a lot.
Kafluke said:
Love the phone. Only complaint that I have is the battery life. I only get about 10 hours of normal use before it dies.
Click to expand...
Click to collapse
you call 10 hrs a problem??
I can tether my Xoom for 2 hrs and listine to pandora over bluetooth for another 3 before it dies... my last phone could berly stand 45mins of pandora over bluetooth before crapping out
Always hated the idea of black backgrounds on beautiful 800x480 screens. Anyhows I had the very same quick battery death too and fixed it. One get Juice Defender, very worth while, second run device in portrait mode [I was an old n900 user so I had it in landscape mode, it did not like staying in that mode]. If things get really bad turn off the WiFi when not in use and change the autosync features to off or disabled. ALOT of power is comsumed by adware communicating with various entities while your away from the device. Genuinely suprused by the sheer amount of adware on the device, nearly ever "free" app is adware [meaning you pay with your usage pattern's etc]. YMV but that all I had to do to get the battery under control.
Im a moderate user and my battery is still going strong
Sent from my SGH-T959V using XDA App
orionshock said:
you call 10 hrs a problem??
Click to expand...
Click to collapse
Yep, I'm more than happy getting 10-12 hours of at-office use with WiFi on constantly (including M$ push and personal email) and a moderate amount of browsing during the day. I keep the brightness at "0" as much as possible.
Beats the pants off my N900 which would die in under 4 hours under the same at-office usage patterns.
OEM battery and charger is ~$25 or a Zagg Sparq2 (4 Ah, I believe) for watching hours of video and Angry Birds on those trans-Pacific flights.
You are doing something wrong guys. . .
I'm on a Vibrant /w Froyo 2.2.1 and a 1500mah battery that is now 7 months old.
Battery left says total battery life per charge is 23 hours, 15 minutes.
Now mind you I am a relatively moderately/heavy user. I have 5 homescreens with 15 widgets total on them that refresh every 2 hours, and an intensive live wallpaper.
I use the phone a lot for reading RSS feeds, facebook, texting, and LOTS of music. Total screen-on-time per battery charge is around 3-4 hours with Automatic brightness.
Obviously you have something going on with your phones if you are only getting 10 hours. My phone is also overclocked to 1.4Ghz with overvoltages and I STILL get this good a battery life with all my usage...on an old battery mind you.
Check for rogue apps?
PS: I have Wi-Fi on 100% of the time but NEVER use 3G/HSPA for data since I don't use a data plan. The Wi-Fi is connected 90% of the time the phone is on though since I am always at places with Wi-Fi.

Getting frustrated with unreliable battery life

Ok. Android phones are not blackberries, and I'm well aware of that. This Thunderbolt is not my first android device, so I am very familiar with setting it up and using it in such a way to make the battery last.
I'm not posting this to complain of the battery life sucking. I'm complaining that the battery is fine one day, and horrible the next.
So here's what happens. Yesterday, i unplugged my phone at 730am like i do every day. By 3pm with light usage, i was down to 40% or so. Charged it up before I left work, no big deal, lasted the rest of the night.
Today, unplug the phone at 730am, phone is completely dead, as in, won't even boot by 11am. Same apps, same usage, same location, same strong 4G signal, same everything. It has happened multiple times on consecutive days when i was rooted on the stock rom, and still on VirusRom. I just dont get why this happens. I am doing nothing different and my phone either lasts all day, or a few hours. It's getting to the point where I am finding it very hard to rely on this phone when i'm out and about. It makes no sense. Especially if i'm not really using my phone, just checking for texts once in a while, there is no reason why it should die. What if i need it? I couldn't even call or text my gf tonight while I was working because my phone battery was ZERO only a few hours after leaving the house with a 100% charge.
Is anyone else experiencing this?
yesterday I had abnormal drain on my battery. I get 18 - 24 hours on a charge normally, but yesterday I went from 100% to dead in 5 hours. Called VZW and they said it was a documented problem and they were working on it.
IDK, they are pretty good about pushing updates. Also, yesterday I kept dropping out of data. bizzare....
I burned through the extended battery in 9 hours yesterday, really hope they figure out some better power management soon,
Switch it to 3G cdma rev.a and see if that helps. The 4G radio is always being searched for. I love the tb so I can deal with no 4G til they get the bugs out.
Sent from my ADR6400L using XDA Premium App
You have to use current widget and see how much power draw your phone is pulling. Then use system panel monitoring to track apps using the highest CPU.
Definitely an issue and I'm glad that Verizon is aware of it. I've had this unusual drain happen four times now, all on 4G. Last time I noticed it (seeing the battery percentage drop like 2% every five minutes or so), went to the Market and snagged System Panel.
The offending process is "system." Had my CPU spiked at 100% for over an hour before I rebooted, which does fix it, at the cost of another 10% of your battery, of course.
Hope they get this ironed out soon. Love my Thunderbolt, but this is a major issue and seems to be happening to a lot of people.
The best thing to do is dial *#*#4636#*#* and turn the radio to CDMA auto (PRL) mode.
I am already seeing much better battery life, as I am in a non 4g area.
Thanks for the suggestions. I'll have to give that a try. I got into the radio settings, and after flashing VirusRom, my phone defaulted to LTE mode only. I put it to cdma/lte auto, to see if that helps. If not, i'll just disable LTE unless i really need it.
No need to dial all of that crap. TeamAndIRC has a toggle app called "LTE OnOFF TeamAndIRC" that allows you to toggle between CDMA and CDMA + LTE/EvDo auto.
I found out two things dealing with my massive nighttime battery drain. One, wifi doesn't seem to work correctly. I've never had the problem before but for some reason it doesn't sleep correctly. What I've done is changed the sleep policy to "15 minutes" which allows it to switch back to 3G fifteen minutes after I turn off the screen. That allows me to have wifi while I'm using it but 3G while it's idle. This has seemed to fix my problem along with... Second, I am on the fringe of 4G/3G here on the outskirts of Cincinnati. At work I am solid 4G but at home it can't make up it's mind. Well, that has certainly played into the battery issue as it is constantly searching. So, what I do is as I walk in the door from work I use the app listed above to switch to "CDMA auto (PRL)" and it sticks to 3G. When I get to work I switch to "CDMA + LTE/EvDo auto".
So, to summarize:
I have eliminated my nightime drain by doing two things:
1) I use the Y5 app to automatically start wifi as I walk in the door but have changed the sleep policy to "after 15 minutes".
2) I use the app above to switch from 4G/3G auto to 3G only.
ridobe said:
No need to dial all of that crap. TeamAndIRC has a toggle app called "LTE OnOFF TeamAndIRC" that allows you to toggle between CDMA and CDMA + LTE/EvDo auto.
I found out two things dealing with my massive nighttime battery drain. One, wifi doesn't seem to work correctly. I've never had the problem before but for some reason it doesn't sleep correctly. What I've done is changed the sleep policy to "15 minutes" which allows it to switch back to 3G fifteen minutes after I turn off the screen. That allows me to have wifi while I'm using it but 3G while it's idle. This has seemed to fix my problem along with... Second, I am on the fringe of 4G/3G here on the outskirts of Cincinnati. At work I am solid 4G but at home it can't make up it's mind. Well, that has certainly played into the battery issue as it is constantly searching. So, what I do is as I walk in the door from work I use the app listed above to switch to "CDMA auto (PRL)" and it sticks to 3G. When I get to work I switch to "CDMA + LTE/EvDo auto".
So, to summarize:
I have eliminated my nightime drain by doing two things:
1) I use the Y5 app to automatically start wifi as I walk in the door but have changed the sleep policy to "after 15 minutes".
2) I use the app above to switch from 4G/3G auto to 3G only.
Click to expand...
Click to collapse
LTEonoff is just a shortcut to the menu. In essence, it saves no time because you have to download it. If you're flipping it on and off all the time, then yeah, it might behoove you to just dl the app. But, as a one time thing, it's unnecessary.
^You are correct. I switch daily but I didn't see earlier that you were not in a 4G area.
I would highly suggest this to anyone who sees their data connection switch back and forth as I was in my house.
Battery life has been strong the past couple days now. I haven't had any unusual drains since i switched from LTE only mode to EVDO/LTE auto mode. I dont know if this was for sure the issue, but it seems to have made a huge difference. I haven't been plugged in for 2 hours and i still have 92% battery left.
Here's my interpretation of the issue:
There seems to be some kind of problem or bug with the radio which makes it drain an enormous amount of power from some towers (700mA+ is shown on current widget). Even with good signal, I'll repeatably drain a lot of power in certain areas. The "fix" is to disable mobile data or switch to wifi. This lowers the power usage back down to (slightly lower than) normal levels.
For some reason, the radio will not admit to drawing practically 90% of your battery in the battery use menu (nothing does, in fact ... it just looks like normal battery use).
I'm glad to hear that they are aware of an issue that maybe causing this.
I can't stand the battery life either other than that I love the phone
Sent from my ADR6400L using XDA Premium App
Yeah i'm still at 83% battery after being unplugged for 4 hours, light usage.
Another thing i noticed is that when my battery was draining stupid fast, the phone would be warm to the touch even when it was just sitting on my belt clip. All seems well for now.
Mine is good
Sent from my ADR6400L using XDA Premium App
My battery life has recently become terribly inconsistent. Last week I was actually getting through a 16 hour day with light usage, but this weekened I must have installed something because now the phone is lasting 3-4 hours with hardly any usage at all.
The battery information is pretty worthless because it's not showing anything except display using the battery and the display has only been on maybe 8 minutes.
Checked the partial wake info and nothing seems to be running in the background. The battery is just discharging like crazy all of a sudden. Guess Ill start uninstalling stuff to see what might be causing it
I am also having a weird battery experience today. I am rooted running Adrynalyne 1.9. Last few days I was doing great, moderate usage and was staying charged for 16-18 hrs. Today my phone has died twice during my 8hr shift at work. I KNOW something is wrong there. Hopefully a fix is found soon.
On all my Androids (4 of them currently in daily use), I've found that Words With Friends is often a HUGE battery killer...and I don't mean because you play it a lot, I mean leave it running and put your phone down, walk away a while, come back to the phone and it is HOT to the touch! Obviously killing the battery. Something to look at for sure.
I've got the extended battery and just went over 48 hours, with moderate to heavy use by my standards on a single charge. Pretty amazing and I guess I'm not in a bad radio area.
hammer4203 said:
Switch it to 3G cdma rev.a and see if that helps. The 4G radio is always being searched for. I love the tb so I can deal with no 4G til they get the bugs out.
Click to expand...
Click to collapse
The only thing I love about the TB is the 4G...everything else on it, been there, done that. I wouldn't keep the TB if 4G had to be turned off to make it usable in terms of battery life. Hopefully it will be fixed quickly!
Zshazz said:
Here's my interpretation of the issue:
There seems to be some kind of problem or bug with the radio which makes it drain an enormous amount of power from some towers (700mA+ is shown on current widget). Even with good signal, I'll repeatably drain a lot of power in certain areas. The "fix" is to disable mobile data or switch to wifi. This lowers the power usage back down to (slightly lower than) normal levels.
For some reason, the radio will not admit to drawing practically 90% of your battery in the battery use menu (nothing does, in fact ... it just looks like normal battery use).
I'm glad to hear that they are aware of an issue that maybe causing this.
Click to expand...
Click to collapse
Thanks for that analysis. With that in mind, if it's accurate, could a Tasker app profile be set up that does your fix if the drain works that high? Would be a nice safety feature for those who aren't willing to have to look at their phone frequently to check battery life.
You have to use the current widget to record your idle power readings, its the only way to know what's going on. Then use system panel monitoring to see which app CPU is highest.

[Q] Battery Troubleshooting/Feedback

I am currently using a Galaxy S3 SCH-I535, stock, unrooted, and have noticed decreased battery performance over-time. I have already viewed many similar threads to try and pinpoint particular issues (wakelocks, troublesome apps, etc.). I was hoping for some perspective whether my battery life is up to snuff.
I have seen many describe their phone life with ~3+ hours of screen time with moderate usage. I use my phone intermittently throughout the work day to chat (Text messages, Hangouts), check e-mail, and browse the internet. I do not use Wi-fi, aside from when I am home in the morning or at night, and make sure to turn it off if not connected to a network. I have sync turned on, but the only accounts I have syncing are Google Now and Gmail. I have location services/GPS/Bluetooth turned off, and run in Power Saving mode with brightness at ~50% and haptic feedback turned on. My reception is subpar, usually about 2 bars and spotty 4g connections at work. I do not stream music, play games, or watch videos during typical use. No facebook, weather apps, etc. that can be culprits some times. At best, with the usage habits described, it is typical that I get 2 hours screen time over a single day (~16 hrs) before I get in the single digit battery %.
I've attached some screen shots I took of battery stats at ~50% drained (I didn't get a screen grab for it but at that battery % I had probably 1:05 to 1:15 hours of screen time). I just started using Wakelock Detector to find any problem apps - after tweaking some apps last week this has been pretty typical behavior. I have even swapped batteries with my wife's S3 to see if it was a battery problem, but did not notice a difference.
Any feedback would be greatly appreciated. Are my expectations for battery life too high? Is this typical, or am I running lower than I should be?
That is pretty good but this comment is by someone who is rooted with a custom ROM and custom kernel since I bought the phone 7 months ago. I can't really say that is the average battery life for the device.
This looks pretty normal to me. You said you had spotty 4g coverage, while your phone is coming in and out of 4g service you'll get decreased battery life. Same happens with your mobile data and Wifi signals if they aren't strong connections.
It looks like your phone is running pretty well. People getting 3+ hours of battery life are either using their phone all the time and hit that threshold in something like 8 hours, have amazing coverage, and/or have no syncing services turned on. A key to run away Wakelocks are having a high battery usage that is coming from something other than your screen, such as media and android system. Other Wakelocks you can't do too much about. There's a thread that is titled the noobs guide to Wakelocks that gives you a pretty good direction trying to isolate Wakelocks and finding fixes for them.
I routinely get about 2-3 hours of battery life in a good coverage area in 16 hours, if I'm in a spotty area my battery will drop much faster. At a friends house with worse coverage I'll be lucky to hit 2 hours. I pretty much use my phone the same way as you.
Sent from my SCH-I535 using Tapatalk 2

Lte vs 3g battery life

Will the phone have a longer battery life if the cell modem is set to 3g vs lte?
Sent from my Nexus 5 using xda app-developers app
Bump
Sent from my Nexus 5 using xda app-developers app
Yes, in my experience with the S4 it's a pretty big difference UNLESS you get a very strong LTE signal. I'm on tmobile and now have the N5 and use the 3G setting which is HSPA/+ Plenty fast for me for what I do. When I want some extra speed I'll kick on the LTE
Does anyone have a more detailed answer for this? I just got this phone yesterday so I haven't been able to find out myself yet, just with 5hour battery life from 100% to 4% on what will only be half of its normal day I'm looking for anything to help right now till I get a battery case. This phone is one of only two to have a LTE radio that is supposed to use 30% less power than usual so I'm wondering if that makes it as efficient if not more than 3G for idle in your pocket to light stuff like FlipBoard.
it would depend on the quality of the data connection. im in brooklyn nyc, and use lte on my nexus 5 exclusively, used to use it on my nexus 4 as well. with 3g(hspa+), on both my n5 and n4, i average about 4-4.5 hours screen on time. when using lte, i average about 5-6 hours screen on time on both my nexus 5 and 4. after noticing this difference, i use exclusively lte on both my devices, as i average an hour more screen on time when using exclusively lte.
herqulees said:
Does anyone have a more detailed answer for this? I just got this phone yesterday so I haven't been able to find out myself yet, just with 5hour battery life from 100% to 4% on what will only be half of its normal day I'm looking for anything to help right now till I get a battery case. This phone is one of only two to have a LTE radio that is supposed to use 30% less power than usual so I'm wondering if that makes it as efficient if not more than 3G for idle in your pocket to light stuff like FlipBoard.
Click to expand...
Click to collapse
Serious battery drain can have many reasons. One is having LTE on, syncing on(if you just booted it up, and input your Google account and let all your apps sync and download, its gonna drain your battery fast the first time), having locations on and wifi enabled. If you are in an area with poor reception, your phone will drain more trying to find connection.
Sent from a potato
simms22 said:
it would depend on the quality of the data connection. im in brooklyn nyc, and use lte on my nexus 5 exclusively, used to use it on my nexus 4 as well. with 3g(hspa+), on both my n5 and n4, i average about 4-4.5 hours screen on time. when using lte, i average about 5-6 hours screen on time on both my nexus 5 and 4. after noticing this difference, i use exclusively lte on both my devices, as i average an hour more screen on time when using exclusively lte.
Click to expand...
Click to collapse
Thanks for the information. That's what I was wondering but I couldn't find anyone that had already tested this with these new radios. If I get the time this weekend maybe I'll do my own test in detail to compare LTE to 3G. Am thinking of using a TV episode on Netflix and see which makes the battery drop faster over the 30 or so minutes.
Slightly off topic, does anyone's WiFi show as always on in the battery monitor even if its been off? Still trying to figure out my battery drain issue, if it even is an issue with just me, I bought this phone knowing it had a small battery.
herqulees said:
Thanks for the information. That's what I was wondering but I couldn't find anyone that had already tested this with these new radios. If I get the time this weekend maybe I'll do my own test in detail to compare LTE to 3G. Am thinking of using a TV episode on Netflix and see which makes the battery drop faster over the 30 or so minutes.
Slightly off topic, does anyone's WiFi show as always on in the battery monitor even if its been off? Still trying to figure out my battery drain issue, if it even is an issue with just me, I bought this phone knowing it had a small battery.
Click to expand...
Click to collapse
go to the main phone settings, wifi, 3 dots on the bottom right, advanced, then disable scanning always available..
ill be interested in seeing your results
simms22 said:
go to the main phone settings, wifi, 3 dots on the bottom right, advanced, then disable scanning always available..
ill be interested in seeing your results
Click to expand...
Click to collapse
Seems that's a whole other debate on weather leaving that on or turning it off helps battery life. Apparently if you turn it off then apps that want your location will turn the GPS on and waste battery (looking at you Facebook...), but if you leave it on the phone just tells the app your location from WiFi networks around you.
One thing I didn't think about is I had added my work WiFi yesterday but it wouldn't connect to it, wouldn't tell me why but I'm assuming it's because of bad signal as I'm a valet outside and the WiFi is from a bar across the street so I forgot about it but WiFi was left on with that network saved, my Nexus 7 can connect to it on most days and any laptop has no issues but with this being a phone I guess it doesn't have a big enough antenna. So I'm wondering if now that I deleted that WiFi network, and I always have my phone set to not notify me of public networks, if my battery won't die so fast today.
And now I'm just rambling but I just looked at my screenshot I took yesterday of battery use before plugging in at 4% and WiFi isn't even being shown on top six things that used the battery, lowest one being shown is a Chrome process using 3%.
EDIT: Well off to work now with my phone 100% charged, will have screen 100% (am outside in the sun), BT off, WiFi on (disconnected, no saved networks nearby, open network notifications off, always on during sleep, scanning always available, avoid poor connections, and WiFi optimization), LTE on/connected, NFC off. So lets see how things go. It will have tons of screen on time as all I do at work is read through FlipBoard, then if I run out of things on there I move to FB. Lets see how this goes...
http://www.qualcomm.com/media/docum...envelope-tracking-technology-3g4g-lte-devices
Nexus 5 has it and its doing its job saving battery
Sorry for digging up such an old thread, but with LTE my Nexus 6P, it switches between HSPA and 3G. When turned to 3G, nothing changes. Would that mean I would save battery?
Sent from my Nexus 6P using Tapatalk

[Q] Poor cell signal draining battery? How to get those 8+ hour OST?

Hi
I tried searching Google, but get a lot of different answers.
I live in an area with a very bad cellular coverage. I always have 1 out of 5 bars and when I turn mobile data on, it is mainly LTE, but jumps a bit between LTE and Edge and rarely H and H+.
Can that cause a lot of battery drain? As I just factory reset my phone to get rid of every change I did. I enabled Stamina Mode, surfed the web for 15 minutes and my phone was at 95%. Is that normal? Because if my math is right, that shouldn't give me more than 5 hours of screen time, while I heard people getting 8+ without Stamina Mode.
Am I missing something or is their some very needed settings to be changed? Sync off, GPS off, bluetooth, Brightness is as low as possible, NFC off, black background (less power consumption), Wifi off and Wifi constant searching off.
U can easly check urself how cell signal draining battery ,first Check how it is with normal H+/LTE then charg it again for 100% and use ur smartphone with plane mode acivated ,now subtract result from 2 "experiment"
Also of note is that black backgrounds mean diddly on our displays. We aren't on OLEDs.
Also, if you ARE in wifi area it's better to be connected to wifi. Wifi is closer than the cell tower and data disconnects when wifi is connected.
On AMOLED/OLED black background helps because each pixel is individually lit (Black means those pixels are off). In LCDs there is a backlight providing illumination for the entire LCD so as long as your screen is on it won't make a differrence what colors are on your screen.
I'm having a similar issue. I have very low cell reception at work, and I can get maybe 4-5 hours SoT throughout the day and am at 10% when I get home. I've tried uninstalling/disabling apps that use a lot of battery, so hopefully it helps. I'll update if by the end of today I'm able to get 7+ hours SoT (which it seems it's on track to doing).
Edit: For clarification, the apps I've uninstalled that I believed to be using a lot of processing power/ram/battery were Facebook, [Facebook] Messenger, and Words with Friends.
festizzio said:
I'm having a similar issue. I have very low cell reception at work, and I can get maybe 4-5 hours SoT throughout the day and am at 10% when I get home. I've tried uninstalling/disabling apps that use a lot of battery, so hopefully it helps. I'll update if by the end of today I'm able to get 7+ hours SoT (which it seems it's on track to doing).
Edit: For clarification, the apps I've uninstalled that I believed to be using a lot of processing power/ram/battery were Facebook, [Facebook] Messenger, and Words with Friends.
Click to expand...
Click to collapse
Just use an app like Greenify to block apps running in the background when not in use so you dont havr to uninstall them.
Brightness can have a lot to play on this one. I tend to go with manual brightness so there's no ambient sensors working all the while the display is on, and if you are doing anything where you can cope with lower brightness then drop it.
Keep an eye in battery stats for "google play services" as this can go nuts. When this happens sometimes clearing data can help.
I also found that using google+ to backup my photos caused a lot of battery drain.
I have not found facebook or whatsapp etc to affect my battery much personally. I use stamina mode when i'm out and about to keep the phone at sleep while the screen is off.
ssj_jaypee said:
Just use an app like Greenify to block apps running in the background when not in use so you dont havr to uninstall them.
Click to expand...
Click to collapse
No root. WIthout Greenify is just annoying.
Jonathan-H said:
Brightness can have a lot to play on this one. I tend to go with manual brightness so there's no ambient sensors working all the while the display is on, and if you are doing anything where you can cope with lower brightness then drop it.
Keep an eye in battery stats for "google play services" as this can go nuts. When this happens sometimes clearing data can help.
I also found that using google+ to backup my photos caused a lot of battery drain.
I have not found facebook or whatsapp etc to affect my battery much personally. I use stamina mode when i'm out and about to keep the phone at sleep while the screen is off.
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Deleted Messenger and Facebook just for the sake of it. I don't have the need to be online all the time and the people that want to contact me, have my number.
Faspaiso said:
it is mainly LTE, but jumps a bit between LTE and Edge and rarely H and H+.
Can that cause a lot of battery drain?
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At my house I get just enough LTE to cause our S3 to constantly switch to LTE then loose it and switch back to H+. Battery life couldn't make it thru one day. ATT removes the screen that let's you control network mode but I found a backdoor method to lock the phone out of LTE. The phone now stays on H+ and battery life easily jumped 40%. That's the primary reason I held out this time for an unlocked non-ATT-crippled phone--so I can easily turn LTE off.
Well, tried have my phone on over night (for a change to test it).
Everything off (mobile data, gps etc).
Used 7% of my power and every app was closed. When I looked at battery drain, 55% was from cell standby and 40-45% was from Phone Idle.
Tonight I will try charge it to 100% again and then let it be in Flight Mode to see.
I struggled to flatten the battery on my phone the first day 70% of the day with the screen on, no wifi enabled or stamina.
Another test would be to change mobile settings to 3G or 2G to see what difference that makes. Under settings, wireless & networks, select more, mobile networks, then network mode.
I would try the above first before making your phone completely unavailable, especially the 2G.
danw_oz said:
I struggled to flatten the battery on my phone the first day 70% of the day with the screen on, no wifi enabled or stamina.
Another test would be to change mobile settings to 3G or 2G to see what difference that makes. Under settings, wireless & networks, select more, mobile networks, then network mode.
I would try the above first before making your phone completely unavailable, especially the 2G.
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Just did the tests.
Flightmode - 100% after 8 hours (sleep)
Edge - 99% after 8 hours (sleep)
4g - 93% after 8 hours (sleep)
Faspaiso said:
Just did the tests.
Flightmode - 100% after 8 hours (sleep)
Edge - 99% after 8 hours (sleep)
4g - 93% after 8 hours (sleep)
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Nice, thank you! Care to check hspa too?
Fruktsallad said:
Nice, thank you! Care to check hspa too?
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What is that? H/H+?
GSM - Edge
WCDMA - H/H+
LTE - 4g
But I think 4g uses less power than edge, but it is more than in my area there is 1/5 in 4g coverage, 3-4/5 in H/H+ and 5/5 (always) if using edge.
As I see an better connection gives better batterylife, but 4g uses way less than 3g/edge if same cell signal.
But is going to try it next time I get down to my dad. He got 5/5 in LTE signal. So gonna see if it can stay at 100% over night.
Faspaiso said:
What is that? H/H+?
GSM - Edge
WCDMA - H/H+
LTE - 4g
But I think 4g uses less power than edge, but it is more than in my area there is 1/5 in 4g coverage, 3-4/5 in H/H+ and 5/5 (always) if using edge.
As I see an better connection gives better batterylife, but 4g uses way less than 3g/edge if same cell signal.
But is going to try it next time I get down to my dad. He got 5/5 in LTE signal. So gonna see if it can stay at 100% over night.
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Hehe, ok I understand. But HSPA = 3G. [emoji4] I haven't done any rigorous testing, but I think my stand by times are much better using edge (2G) compared to 3G.
Fruktsallad said:
Hehe, ok I understand. But HSPA = 3G. [emoji4] I haven't done any rigorous testing, but I think my stand by times are much better using edge (2G) compared to 3G.
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I see. But if you change between those, you probs have an better cell signal with 2g (in your area), right?
Faspaiso said:
I see. But if you change between those, you probs have an better cell signal with 2g (in your area), right?
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Nope, coverage is about the same. Generally speaking though, 2G > 3G > 4G when it comes to battery life. That's been the rule for years, but as of late, newer radios have become more efficient with 3G and 4G, thus making the difference less noticeable. YMMV. Would be interesting to see your drainage on 3G as well. ☺
Fruktsallad said:
Nope, coverage is about the same. Generally speaking though, 2G > 3G > 4G when it comes to battery life. That's been the rule for years, but as of late, newer radios have become more efficient with 3G and 4G, thus making the difference less noticeable. YMMV. Would be interesting to see your drainage on 3G as well. ☺
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Well could try it tonight.

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