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I know there have been many threads like this but I'm just looking for clarification as this is my first Android phone. At my house I usually get the Rogers H speed with 3/4 bars. When I browse the Internet for just an hour, 15% of the battery has been drained. Is this normal on these speeds?
I plan on leaving an IM client on 24/7 and using GPS/maps daily, so I am a bit worried because this may not last the entire day. I could switch to EDGE when I don't need it but apparently I heard that will disconnect once I start a voice call (and want to keep my IM on always). I checked my battery stats and apparently the cell standby (H) is taking most of the battery.
I am using CyanogenMod 6.1.1 with stock radio from Bell. I'm going to try to see if SetCPU makes a difference. And is there any program that can limit the HSPDA bandwidth so less battery is used? Thanks.
call *#*#4636#*#*
If you are at home or in a Wi-Fi accessible, Turn ON wifi - it uses wayyyyy less battery than the phone radio when it comes to Data....
you could get a extended battery.... Mugen Power has one for 1800 mAH and its the same size as the stock battery so no need of a bigger door.
What is your screen brightness set at? The screen is one of the top battery drain culprits. Try turning off auto-brightness, and turning the brightness down to as low as you find tolerable (depending on personal taste, and the lighting conditions in the places you use the phone the most). I recently just lowered my brightness to 35% (still plenty bright under many conditions) from 45%, and already noticing a significant improvement in batter life. Battery usage of the display dropped from over 70% to 45-50%. I haven't had the brightness set this low long enough to see how it translates to hours/days between charges, but we'll see how it goes . . ..
my battery life is retarded. probably less than yours. i swear i think i lose 1% of battery per minute of web surfing. battery is fine if you do not go on the web and have 2g on all day.
Yeah, it's pretty bad.
But that's the same for most smartphones nowadays I think...
Back to the days of game gear, the battery muncher.
6AA = 5 hours of gameplay.
I just bought some Chinese 1500maH batteries on eBay and I don't know if they're actually 1500maH. If I play with my phone a bit, I get 50% after 8 hours at work. Yikes!
Frostie123 said:
I know there have been many threads like this but I'm just looking for clarification as this is my first Android phone. At my house I usually get the Rogers H speed with 3/4 bars. When I browse the Internet for just an hour, 15% of the battery has been drained. Is this normal on these speeds?
I plan on leaving an IM client on 24/7 and using GPS/maps daily, so I am a bit worried because this may not last the entire day. I could switch to EDGE when I don't need it but apparently I heard that will disconnect once I start a voice call (and want to keep my IM on always). I checked my battery stats and apparently the cell standby (H) is taking most of the battery.
I am using CyanogenMod 6.1.1 with stock radio from Bell. I'm going to try to see if SetCPU makes a difference. And is there any program that can limit the HSPDA bandwidth so less battery is used? Thanks.
Click to expand...
Click to collapse
Assuming the screen was on the entire time, 15% drain for an hour of web surfing sounds pretty good to me. The main battery eater while using the phone is the screen, so I doubt messing with your connectivity is going to drastically change your battery consumption in this usage scenario. Changing connectivity to Wifi or EDGE would probably help more during those times when your phone is off but your phone is still connected to the internet.
On a side note, I had terrible idle battery life when I was using CyanogenMod 6.1.1 on my Desire Z. When I was using my phone, battery life seemed normal. But when the phone was on standby, it seemed like my phone was running even when it was supposed to be on standby. I suspect it might have been SetCPU constantly polling in the background. I switched to Virtuous and didn't install SetCPU/didn't do any overclocking and my life improved literally threefold.
Any Singapore users here with rooted/custom ROM'd S2 still experiencing heavy battery drain with fairly normal usage (occasional web browsing and playing games, maybe 3-5 photos - battery dead in less than 8 hours?).
I've noticed that here in SG, my 3G signal keeps on going off and on, as if the phone is constantly trying to reconnect to a 3G signal (SingTel has been pretty bad for me, especially while walking around town). I've turned it off to 2G only and my battery seems to have improved.
Anyone else in SG have suggestions on how to improve battery life?
Although old thread, for anyone who like to have an app to auto toggle 3G in a set interval check this review:
http://forum.xda-developers.com/showthread.php?t=1832442
3G is the suspect zero!!!
3G is definitely the suspect zero for your battery drain....
sgnoobie said:
Any Singapore users here with rooted/custom ROM'd S2 still experiencing heavy battery drain with fairly normal usage (occasional web browsing and playing games, maybe 3-5 photos - battery dead in less than 8 hours?).
I've noticed that here in SG, my 3G signal keeps on going off and on, as if the phone is constantly trying to reconnect to a 3G signal (SingTel has been pretty bad for me, especially while walking around town). I've turned it off to 2G only and my battery seems to have improved.
Anyone else in SG have suggestions on how to improve battery life?
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Click to collapse
Im from SG dude my phone can last for 16hours with 3h-4h screen on. Its pretty decent. Change your modem. Im on LPX. Dont use FB app if you are using one. Its a huge battery drainer. Use BBS to find out what else is keeping your phone awake/draining your battery.
Sent from my GT-I9100 using Tapatalk 2
How the heck you get so good battery life O_O max for me with UV and UC is 14hrs 2.5hrs screen time.................... If you are on stock rom then that is also a suspect, Official 4.0.3 has horrible battery life
Im on RootBox JB by Bajee and Dream Kernel 2.7
Sent from my GT-I9100 using Tapatalk 2
Reading through threads I see lots of people saying JD and similar apps are good and lots saying they are bad. This is quite confusing for someone who just wants to get good battery life. In my experience I have gone from finding it good to finding it bad. I will try and explain why this occurs so that people are able to decide if it will be worthwhile for them.
First install Battery Monitor Widget and find out what sort of drain your battery is experiencing every hour.
With a stock rooted G2 with data connection on continually (no wifi) I was getting around 80-150 mA which explains why it would not last longer that about 16 hours. Most of this drain seems to occur from data connections. After installing JD or something similar the drain can be reduced to around 50 mA. Which is great, suddenly you get the claimed 1.5 to 2x battery life. JD seems great.
But after you install a good ROM and custom kernal, remove or freeze all the apps that keep using your data connection unnecessarily and install Better Battery stats you observe that JD stops the phone going into a proper deep sleep. If you dump it the drain on the phone drops to very low numbers usually under 20mA sometimes 5mA or even 2mA. This means you use around 1-3% of the battery life of the phone overnight with no changes. Now your phone can last days between charges. Note this is with Data or Wifi connections turned on and Sync active always.
Summary:
On a badly set up phone JD improves battery life (for the lazy)
On a well set up phone JD worsens battery life (takes some time)
Note: I got the best results using Speedmods kernal but I have no reason to think that other kernals could not get similarly low battery drains.
Thanks for sharing your observations. I have juice defender and have had similar findings. The wake locks jd causes play into the aos bug of the phone which is why it can make things worse on a well set up phone (the extra drain from the wake locks outweighs the savings from turning the data connection off when it's not in use). If not for the aos bug it would probably be good in all cases. I had noticed this in my testing and am glad to see I'm not the only one.
Sent from my GT-I9100 using xda premium
Thanks for sharing your observations.
If I had seen your post much earlier than I wouldn't have to buy JD. Anyway, I have gone through the hard way, and learnt how to keep my phone organized and minimized rouge apps issue. JD is pretty much useless now.
IMHO, I think Battery monitor widget pro seems to be a much better buy
Thanx for this helpful info!
BTW, kernel not kernal
I do not have a lot of widgets and sync as little as possible. Mail sync is only on demand (when I have time to read it), and Weather is every 6 hour (disabled in night time).
So my battery live is good ½% standby and with normal use it can easily last a full day (no gaming, just Internet, Talk, SMS).
I decided to try JD in order to save even more juice, but JD ended up using more battery than it saved me!
So I can confirm that JD is good for the "lazy user" and bad if your aware of your sync. and how your apps behave.
What do u mean by dumping? You said if you dump it and the drain goea away? Im a bit confused
Sent from my brilliant Viper skinned Apple iPad 2 using the superior Tapatalk Premium
best way to save battery overnight are, disable all internet connection including Wifi, switch to 2G, kill all task then have a sweet dream till next sun rises
KurskS said:
What do u mean by dumping? You said if you dump it and the drain goea away? Im a bit confused
Click to expand...
Click to collapse
By 'dump' I just meant uninstall JD. If you uninstall JD your phone will be able to deep sleep properly provided it is set up well and you actually save more battery.
foxcheng said:
best way to save battery overnight are, disable all internet connection including Wifi, switch to 2G, kill all task then have a sweet dream till next sun rises
Click to expand...
Click to collapse
Sure you can do that, but it's not necessary. I leave wifi and 3g on and still have drain of 5mA all night. I wake up and have lost almost no battery. The same applies for when the phone is idle during the day.
razar77 said:
Sure you can do that, but it's not necessary. I leave wifi and 3g on and still have drain of 5mA all night. I wake up and have lost almost no battery. The same applies for when the phone is idle during the day.
Click to expand...
Click to collapse
What kernel , Rom and apps (that sync) are you using?
Sent from my GT-I9100 using Tapatalk
I've had this phone for around week (off craigslist so it's been broken in) and I can't seem to get any sort of good battery life from this device. I mean yeah it's ok, max I've gotten is 2.5 hours sot with 10-12 hr standby.
This screen is from today so far. I'm already down to 40% and not even at 2 hrs sot yet. What's going on? I've tried Franco's kernel, fauxs kernel, and now I'm on matr1x kernel. (all with undervolting) I've tried carbon, stock, and now I'm on rasenjb.
I don't think I'll ever get to these 5 and 6 hour sot times with a day and a half of standby everyone is getting.. I bought this device because of how good the battery life I saw everyone was getting and it's been a big disappointment so far. I've tried almost everything and that's why I made this thread. Does anyone have any suggestions?
That's because everyone liked to install custom kernels, underclock, never use their phone like a normal phone and then claim 5 hours SOT which is total BS.
Expect 10-12 hours with 3 hours SOT, that's normal. I've gotten way better than that but only when connected to Wifi and almost no actual phone calls. Anytime you're on the cellular network expect 10-12 hours tops
ingenious247 said:
That's because everyone liked to install custom kernels, underclock, never use their phone like a normal phone and then claim 5 hours SOT which is total BS.
Expect 10-12 hours with 3 hours SOT, that's normal. I've gotten way better than that but only when connected to Wifi and almost no actual phone calls. Anytime you're on the cellular network expect 10-12 hours tops
Click to expand...
Click to collapse
I've seen a lot of screen shots with 4hrs + though. I guess it's only achievable on WiFi. I'm on HSPA+ for 8 hours of the day and then I come home and there's WiFi. So I'm guessing data is draining my battery throughout the day like a hog. Maybe I'll try out that screen off 2G mod that I saw. Thanks for your input!
Sent from my Nexus 4 using xda app-developers app
6 hours+ sot easy....
google now off
low brightness
nfc etc off (go through all settings and turn all unecessary crap off)
double check settings/google/accountname.gmail .. make sure music sync is off/unticked
use wifi only or 2g if you must (set 2g only anyway even when on wifi, stops the phone switching towers all the time)
use custom kernel and undervolt (optional) ..most come standard with a bit of undevolt already
don't have lots of apps syncing all the time.. facebook ect
use aosp browser or similar and not chrome
don't use live wallpapers
don't play heavy games , use mostly for messaging and browsing
meangreenie said:
6 hours+ sot easy....
google now off
low brightness
nfc etc off (go through all settings and turn all unecessary crap off)
double check settings/google/accountname.gmail .. make sure music sync is off/unticked
use wifi only or 2g if you must (set 2g only anyway even when on wifi, stops the phone switching towers all the time)
use custom kernel and undervolt (optional) ..most come standard with a bit of undevolt already
don't have lots of apps syncing all the time.. facebook ect
use aosp browser or similar and not chrome
don't use live wallpapers
don't play heavy games , use mostly for messaging and browsing
Click to expand...
Click to collapse
Might as well buy a Nokia 1611 then
Might have to see how PA is on battery life..
Sent from my Nexus 4 using xda app-developers app
ingenious247 said:
That's because everyone liked to install custom kernels, underclock, never use their phone like a normal phone and then claim 5 hours SOT which is total BS.
Expect 10-12 hours with 3 hours SOT, that's normal. I've gotten way better than that but only when connected to Wifi and almost no actual phone calls. Anytime you're on the cellular network expect 10-12 hours tops
Click to expand...
Click to collapse
Don't be hating because you are in a poor signal area. I get 6hrs sot on wifi and at least 4hrs on hspa+. If you are in an area that is a weaker signal, like 3g and edge with only one bar, sot will be less. I am stock rooted, including kernel. If a person doesn't use the phone the battery will last a long time, but the sot will also be low. For example, 24hrs of battery life with only one hour of sot pretty much means the phone was just laying there and barely used. On the other hand, 10hrs of battery life with 5hrs of screen time means the phone was used much and faired good. Apart from sot, cell signal is the biggest battery drainer. When I go to my sis-in-laws, which is a very weak area, my battery steadily drains with my phone just in my pocket. *edit* I should also note, when at home on wifi, I'm also on my Microcell, so I always have a strong signal.
Sent from my Nexus 4 using Tapatalk 4 Beta
I usually get between 2.5 and 3.5 hours screen on time. Sometimes better, sometimes worse. You can use better battery stats to diagnose and try to kill unnecessary wakelocks. And yes you can under clock and sacrifice functionality, but rest assured 5-6 hours sot is not typical, even if some people can achieve it on a regular basis.
Sent from an N4 blessed with AOKP and sanctified by Faux123!
fernandezhjr said:
Don't be hating because you are in a poor signal area. I get 6hrs sot on wifi and at least 4hrs on hspa+. If you are in an area that is a weaker signal, like 3g and edge with only one bar, sot will be less. I am stock rooted, including kernel. If a person doesn't use the phone the battery will last a long time, but the sot will also be low. For example, 24hrs of battery life with only one hour of sot pretty much means the phone was just laying there and barely used. On the other hand, 10hrs of battery life with 5hrs of screen time means the phone was used much and faired good. Apart from sot, cell signal is the biggest battery drainer. When I go to my sis-in-laws, which is a very weak area, my battery steadily drains with my phone just in my pocket. *edit* I should also note, when at home on wifi, I'm also on my Microcell, so I always have a strong signal.
Sent from my Nexus 4 using Tapatalk 4 Beta
Click to expand...
Click to collapse
Nobody's hating. But somebody IS lying.
ingenious247 said:
Nobody's hating. But somebody IS lying.
Click to expand...
Click to collapse
Are you referring to me? Lying about what? You don't think I can get 6hrs sot on wifi and my microcell. You don't think I can get 4hrs sot on mobile data cellular signal? Those figures are fairly common and I have posted screen shots before. Or maybe you don't believe that a poor signal will drain battery more? Do some research. http://forums.androidcentral.com/showthread.php?p=2817363
Sent from my Nexus 4 using Tapatalk 4 Beta
Signal
Yeah! Its true. Poor signal make your phone drain more battery.
If in your carrier the 2G signal is better than 3G. Set the phone to use only 2G network. (GSM)
Put this in the phone app: *#*#4636#*#* and see the difference.
fernandezhjr said:
Are you referring to me? Lying about what? You don't think I can get 6hrs sot on wifi and my microcell. You don't think I can get 4hrs sot on mobile data cellular signal? Those figures are fairly common and I have posted screen shots before. Or maybe you don't believe that a poor signal will drain battery more? Do some research. http://forums.androidcentral.com/showthread.php?p=2817363
Sent from my Nexus 4 using Tapatalk 4 Beta
Click to expand...
Click to collapse
You're not talking about real world usage. Nobody uses their phone like that. It's people like you that come into threads where regular users with genuine concerns and questions get ridiculed by some guy who has his "phone" set up like some friggin science project talking about 5-6 hours SOT.
Google Search: Nexus 4 poor battery life
About 12,600,000 results (0.19 seconds)
Google Search: Galaxy S3 poor battery life
About 6,310,000 results(0.24 seconds)
^that's half of the results and the S3 has been out way longer with millions more users/owners
Obviously the Nexus 4 has a sub-par battery for today's standards. Case closed.
I answered his question with real life facts, and you're in here spinning fairy tales feeding a delusion that he can go about using his phone like a normal person and get 5-6 hours SOT.
So yeah, you're lying IMO.
Having a poor signal doesn't cut SOT by 4 hours.
Yes, I forget, I'm not using my phone in the real world when I'm working on my science project. Lol. Sorry buddy, but I did unlock my bootloader and root in order to transfer app data from my previous phone, but I am running the stock rom, even odexed version, and stock kernel. I have syncing, nfc, wifi, and gps always enabled. The only thing I don't keep on is Google Now because I don't use it. If you bothered to look closely at the screen shots, you would see the constant strong signal due to my Microcell. When on a weaker cellular signal, it cuts into my sot. I use a Microcell because without it, I get a really crummy signal, so I know firsthand what battery drain is like. And as I stated, on cellular only, I get 4-5hrs screen time, worse if I'm in a really poor location. Idk where you get this 4hr difference from.
Sent from my Nexus 4 using Tapatalk 4 Beta
I usually get around 3.5 - 4 on Franco m2 and carbon Rom browsing the internet on WiFi. No other weird settings, all sync on. It's closer to about 3 doing the same on mobile data. Playing games will toast my battery. I'm still plenty satisfied with my battery life.
---------- Post added at 08:36 PM ---------- Previous post was at 08:16 PM ----------
username8611 said:
I usually get around 3.5 - 4 on Franco m2 and carbon Rom browsing the internet on WiFi. No other weird settings, all sync on. It's closer to about 3 doing the same on mobile data. Playing games will toast my battery. I'm still plenty satisfied with my battery life.
Click to expand...
Click to collapse
Also, watch your background apps, Facebook and Google maps have caused battery drain for some people.
username8611 said:
I usually get around 3.5 - 4 on Franco m2 and carbon Rom browsing the internet on WiFi. No other weird settings, all sync on. It's closer to about 3 doing the same on mobile data. Playing games will toast my battery. I'm still plenty satisfied with my battery life.
---------- Post added at 08:36 PM ---------- Previous post was at 08:16 PM ----------
Also, watch your background apps, Facebook and Google maps have caused battery drain for some people.
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Click to collapse
I uninstalled facebook. Also Google maps, Google search and most of the other common battery drainers are on greenify. I've come to the conclusion that my mobile data radio is the biggest drainer. Would upgrading my radio offer a more efficient battery life? (I've never upgraded a radio on any of my devices before)
Sent from my Nexus 4 using xda app-developers app
nyyankees1237 said:
I uninstalled facebook. Also Google maps, Google search and most of the other common battery drainers are on greenify. I've come to the conclusion that my mobile data radio is the biggest drainer. Would upgrading my radio offer a more efficient battery life? (I've never upgraded a radio on any of my devices before)
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
It probably is low signal strength killing your battery, I should have thrown in the fact that 90% of the time I have full signal. Flashing a radio is no biggie, just dont be stupid about it and kill power halfway through the flash. No need to wipe anything either. I think i saw some recovery flashable ones around here, but i like to use fastboot whenever possible. .48 is the latest official radio, with .54 coming from an international white n4. I'm on .48 and holding off until .54 becomes official before deciding to test it out, since .48 is golden for me. Test all of them, older doesnt mean worse and some people have better luck with the older radios.
It may not be relevant to your experience, but I was disappointed initially in N4's battery life too. Even after dialing down most automatic syncing, being very conservative with screen brightness, and other standard measures.
I installed wake lock detector. In my case, Dropbox was at the top of the list, with an inordinate # of system wake ups.
Turned out a copy of Dropbox on another machine on the same network was, with the 'LAN Sync' option enabled by default, sending out gobs of wake-on-lan packets and was waking up the N4 very often; something that would happen even without Dropbox on the N4, presumably.
Disabling Dropbox's LAN sync seemed to bump my battery life ~20-30%.
Google told me 10 - 12 hours continuous useage. I haven't had anything like that from mine.
username8611 said:
It probably is low signal strength killing your battery, I should have thrown in the fact that 90% of the time I have full signal. Flashing a radio is no biggie, just dont be stupid about it and kill power halfway through the flash. No need to wipe anything either. I think i saw some recovery flashable ones around here, but i like to use fastboot whenever possible. .48 is the latest official radio, with .54 coming from an international white n4. I'm on .48 and holding off until .54 becomes official before deciding to test it out, since .48 is golden for me. Test all of them, older doesnt mean worse and some people have better luck with the older radios.
Click to expand...
Click to collapse
Thanks for the info! How do I check which radio version I have?
Sent from my Nexus 4 using xda app-developers app
Why are you fairies arguing?
I got my n4 yesterday and battery seems decent. I was listening to spotify while driving and spent about 1.5 hours in the gym listening to it as well. Also throughout the day was messaging, Facebook, twitter etc. Not heavily, but every once in a while. I'm satisfied.
Sent from my Nexus 4 using xda premium
Hi guys,
I've had my nexus 4 for a bit less than a year now, and I really am not satisfied with the battery life, both standby and even so when using, ON MOBILE DATA. Battery life on Wifi seems not too bad, but on mobile data, whether the signal is high or low, the battery just goes down super quickly. Everything else about this phone is still rocking so nicely, so I was considering switching phone just for battery life. But I thought maybe I should consider asking here first, and also maybe trying battery pack too. But before I spend my money on a battery pack, do you guys know how to have noticeably longer battery life on nexus 4 WHILE DATA IS ON?
Thanks!
i get 4.5-5h screen on time constantly, with only mobile data, lte. battery life all depends on how you personally use the phone, how you set it up, what apps you use, and, very importantly, the quality of your phone/data signal. that phone/data signal can make a huge impact on battery life. anyways, using hspa+, i get around 4h sot. on lte i get closer to 5h sot.
Look at things that make your phone work more than it has to.
Do you need to report your location to Google to have them prompt you about a nearby business that wants a portion of your paycheck? (or maybe it's allowance). If not turn off location reporting. How bright do you have your screen? Do you have auto brightness enabled?
Google is your friend. Make use of their search tools and do some of the tips they talk about. No matter what you do, mobile data will chew your phone alive if you do not have a good signal.
simms22 said:
i get 4.5-5h screen on time constantly, with only mobile data, lte. battery life all depends on how you personally use the phone, how you set it up, what apps you use, and, very importantly, the quality of your phone/data signal. that phone/data signal can make a huge impact on battery life. anyways, using hspa+, i get around 4h sot. on lte i get closer to 5h sot.
Click to expand...
Click to collapse
What Kernel Settings are you using? Thanks
VinciusG said:
What Kernel Settings are you using? Thanks
Click to expand...
Click to collapse
ondemand/deadline, brightness around 20%, lte with a great data/phone connection, a rom with a minimal amount of features and a kernel with very little amount of features.
simms22 said:
i get 4.5-5h screen on time constantly, with only mobile data, lte. battery life all depends on how you personally use the phone, how you set it up, what apps you use, and, very importantly, the quality of your phone/data signal. that phone/data signal can make a huge impact on battery life. anyways, using hspa+, i get around 4h sot. on lte i get closer to 5h sot.
Click to expand...
Click to collapse
Thanks for letting me know. How about standby time? For me, on standby with 3g on (not lte), probably 1% drop for every 5 to 10 minutes. not really sure 100% cause I never measured it. But for ex, on the road, if I check my battery life often, I can see the percentage drop super quickly. When using it, it plummets almost. lol
Does Nova launcher drain battery by any chance? I've been using nova launcher for a long time, but after I installed it for my sister on her pretty old GS2 last time, she told me she thinks Nova launcher is draining her phones battery. I'm not sure what other apps I have may drain battery. FB, and messaging apps definitely makes my phone wake lock more frequently, but I definitely need to get notification from messaging apps, so I can't greenify them. Same for apps like Wunderlist, where I need to receive reminder because they are important.
I just tried a battery saver app but it doesn't really help much..it's much different from when I first got my nexus 4 about an year ago. Back then, I don't know what I had installed but my standby time was extremely good on Wifi at least, MUCH better than my old GS2. But now it's as bad as that.
Do you use any battery saver app? any suggestions?
BTW, the max I get with a mix of 3G and wifi is about 2 hours. No games btw. Just web, google now, play store, app interaction, google plus, etc.
ph37rd said:
Look at things that make your phone work more than it has to.
Do you need to report your location to Google to have them prompt you about a nearby business that wants a portion of your paycheck? (or maybe it's allowance). If not turn off location reporting. How bright do you have your screen? Do you have auto brightness enabled?
Google is your friend. Make use of their search tools and do some of the tips they talk about. No matter what you do, mobile data will chew your phone alive if you do not have a good signal.
Click to expand...
Click to collapse
I've searched google a lot before, and they tell me battery saving tips, saving apps, etc that I am already familiar with. I've been using Android since cupcake. But they don't help much because some settings, I need the features, so I can't turn off, and apps they suggested, I tried them before, and I tried again today, but this battery saver app I used (had very good rating and high num of downloads) didn't work as expected. For ex. I tell it to manage both my wifi and data, and when I turn off screen at home with wifi on, it should turn off wifi and ALSO turn off 3g, but it only turns off wifi and it keeps 3g on, which will make my battery life actually worse. I tried with other settings, and it's not as helpful as I thought. Maybe some other battery saver apps are better?