Database Users

Battery Life Guide - Worth a read if you are having issues.

Ive spent the last few days fiddling and testing stuff to increase battery life. Here is what i have learnt...
(Im running R2BA026)
Firstly, personally i do not want to lose any functionality/performance in order to gain battery life. I think that if you are going to spend the money to get a phone with awesome hardware it should be able to run at full whack.
This guide will not be useful to all, but hopefully it will be handy to those in my situation.
This is a guide for what i have found to be the best compromise between battery life and user experience, with the emphasis being on user experience.
My specific goals are:
- I do not want to lose any performance i.e cause any slowdown/choppiness.
- I am only looking for a 24h battery life as i can charge every night.
- I want to be able to use my phone without worrying about battery. Specifically I never want to think "i shouldnt do that it might run down my battery". I should be able to use all the features on my phone without questioning if i can afford to.
-=-
In my experience using a task killer resulted in only minimal gains to battery life but it meant that opening up apps could be a lot slower and apps could be choppy just after opening them.
Additionally the idea of setCPU is a good one however when coming out of sleep or opening an app it takes a little while to get back up to speed. This also causes choppiness. Personally I find lag/choppiness a real pet peeve, it irritates me alot, so I do not use setCPU either. It is true that with careful set up the lag can be minimised but then the battery life gains are also minimal, so I choose to keep full performance and dispense with setCPU. Bear in mind that the hardware platform is already very efficient and well optimised so a software solution will pretty much be a straight trade of performance for battery life.
-=-
With those two common options out of the way, what else can be done to save juice?
Well generally the biggest consumer of energy is the screen. The simplest option is just to turn it down to minimum brightness, but in my opinion that is not a good solution, its too nice a screen to have dimmed all the time. Thankfully the auto-brightness does a pretty good job of keeping the back light at a good level. It can be a bit disconcerting if you enable it when using full brightness as the drop can seem somewhat dramatic but don't let that put you off, give at 1/2 a day or so and you wont even notice.
Other easy but important things you can do are turning the screen timeout to minimum and always turning off the screen (power button) as soon as you are finished. They are tiny changes but really do make a big difference.
-=-
Onto wifi...
I think there may be a bug with the firmware because if I disable wifi I get a HUGE increase in battery life when Im at home. I have good 3g coverage here and a 3GB allowance so I only need to turn on wifi when Im browsing the web or market, seeing as it takes seconds with the widget this option suits me fine.
I suspect that when the phone is connected to wifi it doesn't sleep properly so drains very fast.
Only turning on wifi when i want it made by far the biggest difference to me, and as it doesn't affect my user experience in any appreciable way I am happy to do it.
I think its a good idea to mention app/widget updates and refreshes here, personally i have all my widgets and apps set to refresh only once a day, that suits me fine because I can refresh them all manually very easily if I want to to be absolutely up to date and I'm not a twitter or facebook addict Most of my widgets are news/article based so once a day is perfect.
-=-
GPS, again this is rather obvious, if you don't use it, turn it off. Personally i use latitude so I have it turned on all the time. Android seems very good about only using it when it is needed and the phone seems to get a fix very quickly so in reality it doesn't spend much of the day being active.
Same goes for bluetooth, although I don't use it so it stays off.
-=-
Nothing i have said here is particularly revelatory mostly common sense but I have always had battery issues often with the battery lasting ~12 hours before asking to be charged.
Updating to 026 made a big difference and following these rules means my battery drains on average 2-2.5% an hour under normal use.
Normal use for me:
-Wifi Off
-GPS on (With latitude widget)
-Gtalk always running
-3 news widgets + timescape
-frequent texting
-moderate calls
-frequent fiddling
The phone is very very snappy, everything apart from timescape opens as near to instant as makes no odds, the phone is a pleasure to use. My battery life has comfortably doubled without the use of any apps or any loss of performance.
Mission Accomplished

Thanks
Cheers for that. Very interesting .
I definitely agree about the task killer apps, the OS does a perfect job at running itself!
One question, Am i correct in presuming you have 3g always running? Network mode set to GSM/WCDMA preferred? Ive been afraid to do this as i have it in my head that 3g eats up my battery for fun! I'll have to try it out.
Thanks again!

I bought an extended battery for my X10 the sloping sides stop it looking like a brick. The G1 always looked like a brick with an extended battery but the X10 sloping sides do serve a purpose.

helliewm said:
I bought an extended battery for my X10 the sloping sides stop it looking like a brick. The G1 always looked like a brick with an extended battery but the X10 sloping sides do serve a purpose.
Click to expand...
Click to collapse
I prefer this:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}

bjohnny85 said:
Cheers for that. Very interesting .
I definitely agree about the task killer apps, the OS does a perfect job at running itself!
One question, Am i correct in presuming you have 3g always running? Network mode set to GSM/WCDMA preferred? Ive been afraid to do this as i have it in my head that 3g eats up my battery for fun! I'll have to try it out.
Thanks again!
Click to expand...
Click to collapse
Yep, thats correct With the 3g on it seems to stay in 2g when sleeping then switch to 3g when you wake it, you can see the change in the status bar about a second after waking. Pure speculation though ...
Well, let us know how you get on with 3g active all the time
helliewm said:
I bought an extended battery for my X10 the sloping sides stop it looking like a brick. The G1 always looked like a brick with an extended battery but the X10 sloping sides do serve a purpose.
Click to expand...
Click to collapse
I love how slim the x10 is, that combined with the fact that the 3rd party backs are ugly and can be poor fitting mean an extended battery isnt really an option for me, whatever suits though ^^

iead1 said:
I prefer this:
Click to expand...
Click to collapse
Nice one where i can get one.
Sent from my X10i using XDA App

I certainly plan on getting a pair of bluetooth headphones, will be interesting to see how they affect battery life...

TechGuru_x10 said:
Nice one where i can get one.
Sent from my X10i using XDA App
Click to expand...
Click to collapse
It's from Sanyo. It's being released in Japan in October, but, I'm sure it will come out internationally as well.

James thanks u were helpful
Sent from my X10i using XDA App

Some additional tips based on my personal experience:
-Using a third-party task launcher helps too. Some may not agree, but it works for me.
-Use a third-party digital clock widget instead of the stock one. Again, YMMV.
-Use a third-party(AGAIN!) MP3 player instead of Mediascape. I'm using Meridian, and notice an increase in battery life when playing MP3s.

I like having some control so I run task killer but there's no auto-kill enabled and if I know the phone is just going to turn it back on in 5min, I don't bother killing those apps. Maybe I should just remove it altogether, but it seems convenient to be able to kill an app at will (I do it with windows sometimes).
mmsbludhound said:
-Use a third-party digital clock widget instead of the stock one. Again, YMMV.
...
Click to expand...
Click to collapse
I think the reason why you find that the stock one drains your battery is due to the "use network provided values" being checked in the date and time settings.

Interesting article. I am running 024 and my battery is life is poor. I managed to get seven hours use yesterday after a full charge. My usage throughout the day wasn't anything too crazy. Where I work I get only a standard signal (no 3G). I seem to get a better battery life.
Sent from my X10i using XDA App

I agree battery life is horrible. It makes me really miss my blackberry.
Even when battery life is low, charging it takes FOREVER, not to mention if you plug it in and play with it at the same time, it charges even slower.
My Blackberry Tour charged fully in what seemed like 45 mins from less than 10% batt life. I know they are different phones, but it just really sucks to me.
I'm debating going back to a blackberry now. The X10 and other android phones (and Iphone), are more toys than anything else.
/end rant.
hehe sorry

Thats odd, my phone charges pretty damn fast, just a few days ago i was pleasantly surprised that it charged from completely empty (id forgotten to charge it) to ~80% in less than an hour.

Ballfuzz said:
Even when battery life is low, charging it takes FOREVER, not to mention if you plug it in and play with it at the same time, it charges even slower.
Click to expand...
Click to collapse
Hmm, mine charges from <10% to 100% within 1 - 2 hours.
Make sure you are charging by AC, charging by USB does indeed take forever.

mmsbludhound said:
Hmm, mine charges from <10% to 100% within 1 - 2 hours.
Make sure you are charging by AC, charging by USB does indeed take forever.
Click to expand...
Click to collapse
Yeah I agree by USB takes forever.

JamesBarnes said:
Additionally the idea of setCPU is a good one however when coming out of sleep or opening an app it takes a little while to get back up to speed. This also causes choppiness. Personally I find lag/choppiness a real pet peeve, it irritates me alot, so I do not use setCPU either. It is true that with careful set up the lag can be minimised but then the battery life gains are also minimal, so I choose to keep full performance and dispense with setCPU. Bear in mind that the hardware platform is already very efficient and well optimised so a software solution will pretty much be a straight trade of performance for battery life.
Click to expand...
Click to collapse
Quite interesting for me, I decided to add some statistical experiment about it.
Under my situation and environment. (I won't go in detail, sorry about that)
With SetCPU were 2.32% per hour without any usage.
W/O SetCPU were 3.18% per hour without any usage.
or approximately 7% maximum saving per day time. (for me)
My SetCPU only effected sleep state.
Not a big deal but still significant different, but it could survive for whole day anyhow.
I'm more interested about Killing app. I might try after this as I see many argument about it.

Cebees said:
Quite interesting for me, I decided to add some statistical experiment about it.
Under my situation and environment. (I won't go in detail, sorry about that)
With SetCPU were 2.32% per hour without any usage.
W/O SetCPU were 3.18% per hour without any usage.
or approximately 7% maximum saving per day time. (for me)
My SetCPU only effected sleep state.
Not a big deal but still significant different, but it could survive for whole day anyhow.
I'm more interested about Killing app. I might try after this as I see many argument about it.
Click to expand...
Click to collapse
Ohh figures, good stuff! Always better to have some numbers to work with.
Do you not find that for a few seconds after waking up the phone gets choppy?
I would definitely be interested in seeing the stats with a task killer

Do you guys leave internet/gps on or something? I get 3 hours/percent on idle.

JamesBarnes said:
Ohh figures, good stuff! Always better to have some numbers to work with.
Do you not find that for a few seconds after waking up the phone gets choppy?
I would definitely be interested in seeing the stats with a task killer
Click to expand...
Click to collapse
Yup, with SetCPU for sleep state, it was 'choppy' for a few sec, mostly effect lock screen and screen switching.

[TUT/GUIDE] How to get better battery life

Hey everyone,
I just wanted to help out those people out there who are getting terrible battery life with their G2's. I made this thread because all of the other threads that have a screenshot of someone getting about 14 hours of battery life have just the screenshot and no explanation of how they got this great battery life.
This is after quite a bit of usage (probably about 3 hours of internet browsing and about 1/2 hour of angry birds
Obviously this will only apply to you if you are rooted.
Step 1: Download and flash this kernel.
Step 2: Set SetCPU to this:
NOTE: If you go any farther than 960mhz then the cpu voltage will be raised, causing lower battery life. Everything below and including 960Mhz is the exact same voltage with this kernel so you won't get any improvement by lowing the cpu freq.
Step 3: Disable profiles. ALL profiles.
^_^
Other Tips and Tricks
DON'T USE TASK KILLERS. THEY DON'T WORK.

Hello? Did this help anyone?
Sent from my T-Mobile G2 running Cyanogenmod.

Thanks for this link! I'm trying this out as we speak. I was previously running the GODspeed 1.4 Overclock with ok battery life..so i'm curious to see how this works. I'll definately keep you updated!

I always have a "screen off" profile with the frequencies set to 245/500, and I get insane battery life. Went over 14 hours yesterday, and I still have 55% remaining when I plugged in. That was also on the stock CM kernel. I'm trying out the UV kernel right now.

ibemad1 said:
Hello? Did this help anyone?
Sent from my T-Mobile G2 running Cyanogenmod.
Click to expand...
Click to collapse
It's only been a few hours that this has been posted (and at least in the States, a Sat. morning). Just give it some time. Also, I think quite a few people are running this kind of set up already (based on the numerous discussions seen in the various rom and and kernel threads anyway), so they probably aren't inclined to reply/vote. Even if they weren't doing this, you probably can't expect any results from people for at least a day or two (unless their battery usage was really bad to begin with, they aren't going to know how much this helps until after the change has been in place for a while).
Just a heads up, Pershoot updated his kernel so that the voltages from 768-960 are now the same as at 979, so you might want to update the guide. Also, just wondering why you recommend the performance governor over on demand if you are looking to improve battery life? Won't the performance governor stay at the higher clock speeds for longer periods of time than on demand? Or did you think this was an acceptable tradeoff (as in things don't run as smoothly for you on on demand and you felt the extra power usage was negligible). Just curious. I had always run on demand or conservative for battery life, but conservative is no longer supported in the Pershoot kernel (and some times led to slight lag in my display turning on).
Also, I'm not positive on this since I don't use Sense roms, but I heard that because Pershoot's kernel was designed to run specifically on AOSP-based roms, it may cause problems with Sense ones. Might want to either put a warning in your guide or verify that this isn't the case.

Ok, I'm following this guide, just flashed the kernel, it took more to backup than to actually install the kernel, on CM6.1.1, will check in tomorrow if I see any improvement, because I used to get only about 6hrs of battery life as I was before.
I always have wifi all day at home since my carrier (Movistar Venezuela) does not have 1900/2100 frequencies.

Thanks for the information. Although it is common.

ianmcquinn said:
It's only been a few hours that this has been posted (and at least in the States, a Sat. morning). Just give it some time. Also, I think quite a few people are running this kind of set up already (based on the numerous discussions seen in the various rom and and kernel threads anyway), so they probably aren't inclined to reply/vote. Even if they weren't doing this, you probably can't expect any results from people for at least a day or two (unless their battery usage was really bad to begin with, they aren't going to know how much this helps until after the change has been in place for a while).
Just a heads up, Pershoot updated his kernel so that the voltages from 768-960 are now the same as at 979, so you might want to update the guide. Also, just wondering why you recommend the performance governor over on demand if you are looking to improve battery life? Won't the performance governor stay at the higher clock speeds for longer periods of time than on demand? Or did you think this was an acceptable tradeoff (as in things don't run as smoothly for you on on demand and you felt the extra power usage was negligible). Just curious. I had always run on demand or conservative for battery life, but conservative is no longer supported in the Pershoot kernel (and some times led to slight lag in my display turning on).
Also, I'm not positive on this since I don't use Sense roms, but I heard that because Pershoot's kernel was designed to run specifically on AOSP-based roms, it may cause problems with Sense ones. Might want to either put a warning in your guide or verify that this isn't the case.
Click to expand...
Click to collapse
Don't ask me why, but ondemand drains my battery like crazy compared to performance.
Sent from my T-Mobile G2 running Cyanogenmod.

ibemad1 said:
Don't ask me why, but ondemand drains my battery like crazy compared to performance.
Sent from my T-Mobile G2 running Cyanogenmod.
Click to expand...
Click to collapse
I call BS on this. Performance is max frequency constantly while on demand is whatever is needed.

ahhh...another excellent finding after task kill. btw, task killer helps save the battery power a lot ,too....

TheBiles said:
I call BS on this. Performance is max frequency constantly while on demand is whatever is needed.
Click to expand...
Click to collapse
I'm just reporting what I found. Perhaps the ondemand governer is using more power because its constantly checking the cpu utilization?
Sent from my T-Mobile G2 running Cyanogenmod.

Here's some:
Use the stock charger. I believe the stock charger provides power at 5.5V (I'd have to check to know for sure), because that is the voltage the battery was designed for. A lower voltage could mean that your phone *thinks* it's charging at 5.5V and will stop charging when it *thinks* it's at 100%, while in reality it might only be at 80% or less. Higher voltages could wear out the battery faster but provide faster charging times.
Calibrate your battery. Roughly once a month, let your battery completely runs out (after it shuts down again, turn it on again until it's fully out), let it charge while off, and repeat at least once again. This may have a significant effect depending on how you use your phone
Turn off unneeded services while not in use. Having WiFi, Bluetooth, 3G, autosync, facebook sync, widgets, etc can harm battery. It is super simple to put toggles in your notification bar with either CM, MIUI, or Enom's roms that it is pretty much a painless way to dramatically improve your battery life. Facebook sync can be a huge waste too if you have it updating automatically, try instead refreshing it manually. Get rid of widgets that "seem" useful, but in reality just take up ram, download useless data, and take up space. I mean, I like to be able to know the temperature or whether I should bring a jacket, but do I really need the news to be right there in my face 24/7? Widgets like that would have to be constantly downloading data to be even be relevant, and IMO it is easier to just open an app. You can leave GPS on though, as the phone only activates it when necessary.
Update your radio to the latest available. This one is just common sense. The radio is basically the driver which your phone uses to connect to the cell tower, so wouldn't it make sense to have the newest, most efficient radio? I use the .02.17 radio and it is definitely better than the radio that came with the phone originally. Use Gfree before you switch because getting s-off with .02.17 is a pain in the butt.
Those are just some of the things I've realized with both my G2 and my G1 before it.

phonepart8 said:
ahhh...another excellent finding after task kill. btw, task killer helps save the battery power a lot ,too....
Click to expand...
Click to collapse
No, task killers don't work at all on Android. Especially so after 2.2.

mejorguille said:
Use the stock charger. I believe the stock charger provides power at 5.5V (I'd have to check to know for sure), because that is the voltage the battery was designed for. A lower voltage could mean that your phone *thinks* it's charging at 5.5V and will stop charging when it *thinks* it's at 100%, while in reality it might only be at 80% or less. Higher voltages could wear out the battery faster but provide faster charging times.
Click to expand...
Click to collapse
I'll get out my multimeter later to test this.
However, I don't think that's true. It probably just figures out whether it's on a usb port or ac charger by seeing if there's power on the DATA lines inside the usb cable. iPod Touches and iPhones REQUIRE this power so they recognize it as a usb port, otherwise they WILL NOT charge. This explains why, if I plug in my G2 into a charger designed for an iPhone (same specs, 5V out at 1.0A) it will register as USB to the phone and will charge quite slowly.
Again, this is all going off assumptions. I'll put my thoughts up against my multimeter readings later. ^_^

TheBiles said:
No, task killers don't work at all on Android. Especially so after 2.2.
Click to expand...
Click to collapse
Added to main post.

So yesterday morning I woke up at 9 am and went to ihop, I disconnected my phone from the charger at around 920 at 100% by the time it was 1040 ish I randomly looked at my phone and noticed my battery was at 33%?!?!?!? And I went crazy:O yet when I got home I charged it to around 83% disconnected at 730..then at 12 am when I got home I was barely at 61%?!?! Whatsoever the reason for this?!?!?!
Sent from my HTC Vision using XDA App
Sent from my HTC Vision using XDA App

kingvaj23 said:
So yesterday morning I woke up at 9 am and went to ihop, I disconnected my phone from the charger at around 920 at 100% by the time it was 1040 ish I randomly looked at my phone and noticed my battery was at 33%?!?!?!? And I went crazy:O yet when I got home I charged it to around 83% disconnected at 730..then at 12 am when I got home I was barely at 61%?!?! Whatsoever the reason for this?!?!?!
Sent from my HTC Vision using XDA App
Sent from my HTC Vision using XDA App
Click to expand...
Click to collapse
I had this very problem with my G2... it fixed itself like yours did. I think it was probably either skype or qik, as the problem went away after I uninstalled them. You might have had a hung up application running in the background.
Sent from my T-Mobile G2 running Cyanogenmod.

I suppose I'm one of those people who had no issues with their battery, but I recommend using a screen off profile for SetCPU. In doing so, I can effectively go almost a full two days on a single charge, but this is with minimal usage. Such as texting and browsing the web for only a few minutes.
Sent from my HTC Vision using XDA App

I just got about 9 hours of battery life with heavy use using this guide:
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I still find myself getting better battery with the use of a screen off profile

Best rom/kernel battery life combos for hw:0003?

I am using ava z3 and caulkins modded(uv and sdfix) HTC 15 kernel.
I only get about 11-12 hours of battery life with moderate to light usage (20 mins of phone, 25 or so texts and maybe 25 minutes of total web browsing)
I see all these posts of people having battery life lasting 20+ hours...
I have setcpu drop my clock when screen is off, random advanced task killer taps, autosync off, gps off, Bluetooth off, and only use 3g all day. Anyone have any combos that I could try or possibly some tips to get my bat life higher?
Sent from my PC36100 using XDA App

MIUI + BCblend. I'm sitting at 36 hours and still have 47% on my battery.

_MetalHead_ said:
MIUI + BCblend. I'm sitting at 36 hours and still have 47% on my battery.
Click to expand...
Click to collapse
What's your display on time?

nabbed said:
What's your display on time?
Click to expand...
Click to collapse
No clue, MIUI doesn't give the awake vs. uptime like a sense rom does. It was with moderate use, maybe 30-40 texts, a bit of browsing, maybe 30 minutes of mini squadron and a few short phone calls.

Myn's Warm 2.2 RLS5 with netarchy-4.3.2-cfs-nosbc-havs-more has done wonders for my evo. I use SetCPU and set the govenor to smartass, have one profile for screen off (384max, 128min smartass). I can get about 7 hours of uptime(20 hours of total up time= that averages to 21 minutes of use every hour...) with 1.5 hours of that being phone calls, about 50 texts a day, checking 3 e-mail accounts (gmail's push) and reading my hundreds of RSS feeds with NewsRob.
The only other time i got similar results was with Warm 2.2 RLS4, HTC kernel #17, and some very aggressive SetCPU profiles. and similar usage.

_MetalHead_ said:
No clue, MIUI doesn't give the awake vs. uptime like a sense rom does. It was with moderate use, maybe 30-40 texts, a bit of browsing, maybe 30 minutes of mini squadron and a few short phone calls.
Click to expand...
Click to collapse
well if you look at the power usage you can click display and it'll show how long your display was on.
what brightness do you set yours at and do you use a stock battery

i have a 003 evo and i find myns rls4 & netarchy 4.2.2 less havs/no sbc the best in battery life & speed.

where do u check this 003 thing? and i have miui 1/21 zendroid kernel about 15 hours so far at 72% wifi on all day 50-60 texts and probably an hour of fb hahaha

To check what hardware go to settings-about phone-hardware info
Also, is anyone using aftermarket batteries or stock batteries for these impressive battery lives?
Sent from my PC36100 using XDA App

randymids said:
To check what hardware go to settings-about phone-hardware info
Also, is anyone using aftermarket batteries or stock batteries for these impressive battery lives?
Sent from my PC36100 using XDA App
Click to expand...
Click to collapse
im feeling pretty stupid right now haha i cant see it. Im running miui rom and i go to about phone>more info but i dont see it

Ahh in ava z3 its similar to stock where settings-about phone has software/hardware infos... I wish I could tell you how to find out because I have been getting the feeling the way hardware reacts to Rom and kernels is a big deal. My buddy has hw:004 running same Rom and kernel and gets about double the battery life
Sent from my PC36100 using XDA App

Ok so ive been changing different kernels just to see if i can get different results. Now im using KingKlicks #12 w/ myns rls5. I use my phone alot & am just looking for SOMETHING that will help my battery life.
So the other day i was in this super retardly long useless meeting. Less than 10 texts, no internet, no apps no nothing. 4g, GPS, Wifi & bluetooth all off. Granted that isnt my regular useage (I really use my phone) but this is the best battery life i could get. (SetCpu on w/ a helluva lotta profiles)
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Whaddya think? What other kernels can use that are made for heavy usage? What else can i tweak....or am i just doomed to carrying a charger everywhere i go??

+1 for a netarchy 4.3.x kernel:
I'm on the original red battery

randymids said:
Ahh in ava z3 its similar to stock where settings-about phone has software/hardware infos... I wish I could tell you how to find out because I have been getting the feeling the way hardware reacts to Rom and kernels is a big deal. My buddy has hw:004 running same Rom and kernel and gets about double the battery life
Sent from my PC36100 using XDA App
Click to expand...
Click to collapse
I've been thinking the same thing I've got a day 1 evo with hardware :v002 and some of the stock kernels worked better im currently trying the modded HTC #15 but battery life is not great with regular use
posted from a Myn EVOlved device powered by Android

deathsled said:
+1 for a netarchy 4.3.x kernel:
I'm on the original red battery
Click to expand...
Click to collapse
3 days??? wait wait...either thats photoshop or you've got a different phone than me!!! In any event im flashing netarchy as soon as i finish typing this!!!
Do you use your phone? Like heavy useage? Or is that 3 days with absolute minamal useage?? 4g, wifi, gps & everything else off??

The question is, what is the definition of best battery life... How long the battery will last with the phone doing nothing? If so, I can get a good 4-5 days using the setup in my sig with just a minimum of texts, calls, and emails, while on wifi.
However, actual practical usage, including 3g, 4g, web, text, calls, etc. Results in a good 1-2 days of battery life. I think once a user has all the bugs (rogue apps that are causing wakelock issues) worked out, that user should focus on optimizing the system for best results for the way THEY use THEIR phone, not the way someone else uses theirs.

^^Agreed i am trying to find the best fit for the way "I" use it however suggestions are welcome. BTW you get 4-5 days 'cause you've got the extended batt. I wanna squeeze every last drop of juice out of my stock battery!! If you can help me there then by all means...please do!!!
Edit: side bar i just flashed netarchy's 4.3.2 cfs-nosbc-havs-more-universal and everythings fine but when i plug my charger in AC or USB it throws my phone into a boot loop....Any ideas?? Btw yes i am gonna find the netarchy thread and ask in there as well.

What's the best one for Myns Rls 5 ?
Sent From One BadAss Rooted Evo 4G On Myn's Warm 2.2 Rls 4 Steroids Via XDA App. ;-)

gpz1100 said:
The question is, what is the definition of best battery life... How long the battery will last with the phone doing nothing? If so, I can get a good 4-5 days using the setup in my sig with just a minimum of texts, calls, and emails, while on wifi.
However, actual practical usage, including 3g, 4g, web, text, calls, etc. Results in a good 1-2 days of battery life. I think once a user has all the bugs (rogue apps that are causing wakelock issues) worked out, that user should focus on optimizing the system for best results for the way THEY use THEIR phone, not the way someone else uses theirs.
Click to expand...
Click to collapse
What's the best way to find the wake lock issues, are you referring to maps, voice, or other random apps running in the background? If so what is the best way to keep these apps but put an end to the wakelock issue.
I am still running ava z3 but I flashed the netarchy 4.3.2 cfs-nosbc-havs-more this morning, downgraded my pri and nv because netarchy said to for battery issues, gave it a full charge from 0, and my battery was garbage... 5-6 hours with a moderate use. Calks modded htc 15 w/ uv and sdfix worked way better, but still can't find these magic 20 hour battery lives that I am dying for.
Reflashed the new pri, nv, and Calks modded 15 and my hunt continues, about to give myns a whirl despite liking ava z3 a lot.
How simple is myns, bloatware gone, fairly simplistic, pretty snappy and lag free? Difference between rl 4 and rl 5?
Sent from my PC36100 using XDA App

Use the battery history function in Spareparts to see what's causing wakelock. As for ways of dealing with it, that's up to the developer.
I don't have too many apps on my phone, just the necessities. Of the main apps I use, k9 and handcent both had issues.
With k9, any time I'd receive an email (using imap), the phone would stay wake locked for 60 seconds. This may not seem like a lot, but after getting many messages throughout the day, that could add up to an hour or more. I experienced this both with fresh 3.5.0.1 and evio2 1.75. When Evio2 1.7.7 came out, I was hesitant to switch - I'm not one that flashes roms every other day just for the hell of it. I already had the phone set up and configured. Decided to give it one more shot, I installed 1.7.7 from scratch and started reinstalling apps.
Through out the process, I was very careful to monitor wakelock state. For what ever reason, k9 was no longer causing wake lock. Something in 1.7.7 changed. It wasn't kernel related because I've tried way too many kernels with similar results. So now, the only wake lock is when the program actually receives an email. Usually 1-3 seconds per email received.
Now with handcent, there is a known issue if the popup function is enabled. Anytime a text is received, with popups enabled, the phone enters a wakelock state until that text is acknowledged. This occurs even if the only popup task is to display the text, and NOT turn the screen on, or flash the led. The fix? Disable popups in handcent. I've posted on their forums, but haven't gotten any acknowledgment. I'll continue to use the program, but without this functionality.
For other programs, best bet it to try to narrow down the conditions causing wakelock and either work around them, or work with the author to try to resolve.
Any as for stand by time, I'm sure even with a standard battery, 4 days is possible if the phone is idling the whole time with data turned off, and minimal or no other usage.
As for kernels, there are other factors at play besides the kernel itself. These include the governor in use and its parameters. Two otherwise identical phones with the same kernel and governors, but different governor parameters will result in different battery life.
In the end, I chose to stick with the conservative governor.
These are the governor parameters I changed in the init.d folder
Filename: 01cpufreq_screenstate_scaling
Code:
MAX_CPU_SPEED_VDD="921600"
MIN_CPU_SPEED_VDD="245000"
#MIN_CPU_SPEED_VDD="384000" DEFAULT
#MAX_CPU_SPEED_VDD="921600" DEFAULT
CONSERVATIVE_SAMPLING_RATE="50000"
CONSERVATIVE_UP_THRESHOLD="80"
CONSERVATIVE_DOWN_THRESHOLD="55"
CONSERVATIVE_FREQ_STEP="10"
#CONSERVATIVE_UP_THRESHOLD="65" DEFAULT
#CONSERVATIVE_DOWN_THRESHOLD="35" DEFAULT
#CONSERVATIVE_FREQ_STEP="15" DEFAULT
These settings were not arrived at trivially, but were changed slightly one at a time, then tested by using the phone. I was looking for decent response/user experience. I was also trying to get the phone to utilize a larger range of cpu speeds than originally programmed into the ROM/kernel. Google the different parameters to understand what they're referring to.
Edit: I'm also using the -100mV undervolt script as opposed to -50mV that the rom originally comes with.

Show your battery record Genuinely

Hi guys,
After buying s2 i was worried about battery life. Because first two days it was like 12-14 hours of medium use.
But now its marathon :d
See some shots..
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Last image is usage of previous charge.
I was a die hard fan of lg phones from optimus one to optimus black but i am happy now that i switched to s2
Cheers guys and please show your records as well.
Sent from my GT-I9100 using XDA App

I thought i was getting good battery life with medium to heavy usage (27 hours) on Cognition 1.15 but that is exceptional, can you tell me your set up as to how you achieved this amount of battery life.
cheers

Tegrak's kernel and underclocked.
Frozen samsung apps. and brightness mostly 0% as i am fairly fine with the lowest brightness it doesn't hurt my eyes.
also one more thing, i am using overclocking upto 1300 as well and you will be surprised most people will tell you to go underclock to save battery but i didn't and i am just happy with 1.3 Ghz blazing speed.
Here's a shot of running.
REMOVED
Also i used camera for recording movie for about 50 minutes in 720P and 50+ photographs as well which is not mentioned in the above post. I will post once again when my battery will reach 1% because when its below 10% it drops really slow and allows me to use it more unlike when its full.

Sit it on a desk and stare at it. The average screen on time is 5 hrs. You can use that in a day or spread it across 3 days.
jonny68 said:
I thought i was getting good battery life with medium to heavy usage (27 hours) on Cognition 1.15 but that is exceptional, can you tell me your set up as to how you achieved this amount of battery life.
cheers
Click to expand...
Click to collapse
Sent from my GT-I9100 using XDA App

One more thing, i only recharge battery when its below 5% or mostly under 2% to full turning it off. And ofcourse this only first week of using the phone, hope it will increase a bit more by next week.
[Note: I personally believe plugging in and out of charger makes the phone battery drop faster]

chaplu said:
Tegrak's kernel and underclocked.
Frozen samsung apps. and brightness mostly 0% as i am fairly fine with the lowest brightness it doesn't hurt my eyes.
also one more thing, i am using overclocking upto 1300 as well and you will be surprised most people will tell you to go underclock to save battery but i didn't and i am just happy with 1.3 Ghz blazing speed.
Here's a shot of running.
img removed
img removed
Also i used camera for recording movie for about 50 minutes in 720P and 50+ photographs as well which is not mentioned in the above post. I will post once again when my battery will reach 1% because when its below 10% it drops really slow and allows me to use it more unlike when its full.
Click to expand...
Click to collapse
You should blur out your IMEI number from the screenshot buddy.

What ROM are you using?
I usually have brightness set to auto, same as you all Samsung apps frozen, am not using Tegrak i don't believe it's compatible with Cognition ROM, are you using Juice Defender Ultimate or other apps,etc,etc, im on setcpu im 200 min - 800 max - on demand and screen off profile - 200 min - 500 max - consertivave - priority 100.
Seriously impressive all the same..

jonny68 said:
What ROM are you using?
I usually have brightness set to auto, same as you all Samsung apps frozen, am not using Tegrak i don't believe it's compatible with Cognition ROM, are you using Juice Defender Ultimate or other apps,etc,etc, im on setcpu im 200 min - 800 max - on demand and screen off profile - 200 min - 500 max - consertivave - priority 100.
Seriously impressive all the same..
Click to expand...
Click to collapse
I am using stock KF3 rooted nothing else i am using except described in previous post.
Cheers.

That is the best battery life ive ever seen on XDA for any type of smartphone never mind one like the GS2, did you use the Internet/Wi-Fi/GPS/Bluetooth,etc, much,do you have any widgets on your screen, push e-mail,etc, im amazed your getting that amount of time without using Juice defender or some other similar app.

jonny68 said:
That is the best battery life ive ever seen on XDA for any type of smartphone never mind one like the GS2, did you use the Internet/Wi-Fi/GPS/Bluetooth,etc, much,do you have any widgets on your screen, push e-mail,etc, im amazed your getting that amount of time without using Juice defender or some other similar app.
Click to expand...
Click to collapse
Bluetooth yes for 10 minutes transfering some files.
Gps yes for around 1 hour (you can see that in pics atleast it shows usage for ndrive there)
wifi yes around 1 hour but its always on mostly (mostly used for market to download and test applications, gmailing and also some browsing)
3g or edge no i didn't use it.
Games yes i played like drag race etc.
widget yes, battery widget and the running app widget and live wallpapers.

Mine, I think there's a little (big) problem :
Considering the first 8 hours were during the night so I didn't touch my phone :
Running on VR2.1, many things push or so (like 15/30mins refresh) [mails, fb, twitter, news, weather, etc], and good modem (KG2) and CF-Root 4.1.
Any idea/advice please ?
A better rom maybe ?
Thanks in avance

Intratech said:
You should blur out your IMEI number from the screenshot buddy.
Click to expand...
Click to collapse
For those of us n00bs here, what or where is the IMEI number?
Also just to clarify, this is a unique number for each phone, yes?

intruda119 said:
Sit it on a desk and stare at it. The average screen on time is 5 hrs. You can use that in a day or spread it across 3 days.
Click to expand...
Click to collapse
Nuff said.
@OP- What's that Widget is (temp, voltage of battery)? Forgot the name!
Regards.

intruda119 said:
Sit it on a desk and stare at it. The average screen on time is 5 hrs. You can use that in a day or spread it across 3 days.
Click to expand...
Click to collapse
+1
The real secret to great battery life is to disable all the data connections and not use the phone. Since most people are pretty active with their phones, threads about stand-by time are pretty meaningless. Actually, with over a dozen battery life threads already running, you could say new battery life thread are pretty meaningless too.

diby_2000 said:
For those of us n00bs here, what or where is the IMEI number?
Also just to clarify, this is a unique number for each phone, yes?
Click to expand...
Click to collapse
Individual to eachphone usedto identify phone on network.Blocked block after theft .Illegal to change. jje
Sent from my GT-I9100 using XDA Premium App

Ok thats along the lines of what I thought it was. Thanks.
Didn't know it was possible to change it, illigal. Huh
But can some one tell me where it is shown so I can block it if I ever post some screen shots?

I'm on stock K2-CL. I used 3G just a bit today while in a restaurant, wifi is always on, but I normally sit in front of the computer most of the day, or use my tablet at home, so I do very light surfing - mostly while on the can.
I've not installed "app freezers", nor underclocked the processor, nor rooted or removed anything that isn't stock android. Not stopping tasks in the task manager. In the screenshot below, I did play around a bit on Google Earth for 15 min or so, I'm surprised not to see the android market in there because I feel that's what I used most. I use a live wallpaper that's fairly bright (moving clouds).
Brightness on auto - automatic gmail notifications, contact syncs etc.
I'm going to go on a big trip next week, where electricity will sometimes be optional. I do have that Samsung battery case thinggie coming the mail next week - and already have an external battery as well for emergencies, because this phone will die in an hour or two using the gps, or playing games, or doing serious web surfing - or a combination of those things. It runs very hot too if you use it constantly several hours (drove 500 kilometers last week, the phone was very very hot - seemed unhealthy).

If you hold the power button along with the home button it takes a screen shot.
Thought id say to make it easier for ya in future!

thanks a millions

Don't mind the n00b Here.
Found the IMEI number in the status tab of about phone.
Goto remember to keep this out of public photos.

Best Battery Life Build for Sense

Well, i personally love sense. But i hate the battery life. If i tune down the CPU, it gets a little choppy with every ROM no matter what its at for sense. But i was wondering, what kernel or tweaks can i do to fix my battery life issue? I run screen brightness at 1/5.
Ive been around here for awhile and usualy just get "lower your cpu" or "change kernels" but no specific life amounts or which ones.. Aparently all the good ones wont work with sense =/

ReapersDeath said:
Well, i personally love sense. But i hate the battery life. If i tune down the CPU, it gets a little choppy with every ROM no matter what its at for sense. But i was wondering, what kernel or tweaks can i do to fix my battery life issue? I run screen brightness at 1/5.
Ive been around here for awhile and usualy just get "lower your cpu" or "change kernels" but no specific life amounts or which ones.. Aparently all the good ones wont work with sense =/
Click to expand...
Click to collapse
You gunna have to search the forums a little cause I'm on my phone, but if you know how to insert init.d scripts look up kernal tweaks, umm smurf script by its self also works well, I use cfq I/o, I have my CPU freq maxed out on more lionfish, running smart ass v2 peformance tweaks, that gives you amazing peformance when you need it, and dosent take away much battery, and saves battery like crazy, when screen is off, tomorrow ill go on my comp and send you script or link if you'd like
sent from my EVO EXPRESS 4g

Ok thanks. would love to have better battery life. And im still somewhat new to this. I only know the basics of wiping and flashing and using setcpu and installing kernels =/ so i barely know what alot of these things are like smartass v2 eventhough ive heard it.

Smartass is a governor option when tuning your CPU. It runs the frequency speed in between the two choices you choose 998/384 or whatever your preference may be.
I would suggest flashing the classic rom by tommytomatoe. It gave me the best battery life on a sense ROM. NRGZ sense 3.5 ROM also lasted me awhile. Nothin will compare to Aosp tho since sense is a battery hog. Good luck
Sent from my PC36100 using xda premium

ReapersDeath said:
Ok thanks. would love to have better battery life. And im still somewhat new to this. I only know the basics of wiping and flashing and using setcpu and installing kernels =/ so i barely know what alot of these things are like smartass v2 eventhough ive heard it.
Click to expand...
Click to collapse
Look for Calne's underworld kernel in the same section as your question. It's sbc and overall excellent kernel.
Sent from my lair.

Just searched whole EVO 4G section. Theres nothing even relating to underworld of calne. Only a mention of it in someone else's post.

ReapersDeath said:
Just searched whole EVO 4G section. Theres nothing even relating to underworld of calne. Only a mention of it in someone else's post.
Click to expand...
Click to collapse
This general section. A few threads below yours. It is called Saturday morning by Calne.
Sent from my lair.

ReapersDeath said:
Just searched whole EVO 4G section. Theres nothing even relating to underworld of calne. Only a mention of it in someone else's post.
Click to expand...
Click to collapse
That's because the thread title is "Saturday morning" .

Captain_Throwback said:
That's because the thread title is "Saturday morning" .
Click to expand...
Click to collapse
Yes, and it is really good morning
Sent from my lair.

Jeez. Idk what all that info even is lol. and i dont want to burn up my phone or melt it.. just better battery life and i cant get the kernel either unless i ask XD Whats your guys input?

ReapersDeath said:
Jeez. Idk what all that info even is lol. and i dont want to burn up my phone or melt it.. just better battery life and i cant get the kernel either unless i ask XD Whats your guys input?
Click to expand...
Click to collapse
Trust me, make a step and you will love an extra juice. Again it's up to you. If you don't like it you can always flash another kernel. Just remember to wipe cache and dalvik cache.
Sent from my lair.

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MikG 3.11 With anthrax kernel... Pretty good for me
Sent from my PC36100 using Tapatalk

Using Anker 1700 mah batteries (a small investment), the ROM in my signature and a STOCK kernel. Idk, I was a little apprehensive about stepping backward in Sense versions, but the phone seems to like what it was designed to run and does so fast, with no hiccups and smooth.

Stock battery
Tommy tomato 006 with lithids 009 universal more kernel
Sent from my PC36100 using XDA

http://forum.xda-developers.com/showthread.php?t=1517632
There's a lot of stuff to try for battery life. If you're looking for a miracle answer, you'll not find it. You need to try different kernels, read up on governors and what they do and so on. The link is to a script that has really sped up my EVO and I believe it has helped with battery life.
I was noticing the shots in this thread showing other's battery life but just remember, it's also what you use your phone for. High data games, surfing, Facebook, using GPS type apps will suck any battery dry. I use my phone a lot and am very happy to make it home in the evening to plug it in. Typically it can last 10 - 12 hours with about 5 - 6 hours of use. And I have tryed almost everything out there. Good luck and have a good time reading up on this stuff and trying different things. It's part of the fun of having a phone that allows you to tweak it. (Suck it, iPhone!)

tuscolavol said:
http://forum.xda-developers.com/showthread.php?t=1517632
There's a lot of stuff to try for battery life. If you're looking for a miracle answer, you'll not find it. You need to try different kernels, read up on governors and what they do and so on. The link is to a script that has really sped up my EVO and I believe it has helped with battery life.
I was noticing the shots in this thread showing other's battery life but just remember, it's also what you use your phone for. High data games, surfing, Facebook, using GPS type apps will suck any battery dry. I use my phone a lot and am very happy to make it home in the evening to plug it in. Typically it can last 10 - 12 hours with about 5 - 6 hours of use. And I have tryed almost everything out there. Good luck and have a good time reading up on this stuff and trying different things. It's part of the fun of having a phone that allows you to tweak it. (Suck it, iPhone!)
Click to expand...
Click to collapse
you make very good points. for instance, i generally keep mobile data off because that is a killer. I also rush like crazy when i turn the screen on to get it off as quickly as possible. UV scripts do help

i get max 13 hours on the mikey rom for my evo 4g i guess its ok just has an overall horrible battery life.!

Maybe this is cheating for the purposes of this thread, BUT this guy ripped out all the Sense stuff he could and put in Go Launcher Ex, which would use less battery life.
http://forum.xda-developers.com/showthread.php?t=1550526
It would look much like an AOSP ROM, so I dunno if you'd like that or not, but it has the sense stuff behind the scenes (e.g. kernel).
I got good battery life with it, but i didn't benchmark it or anything.