Database Users

[question] About different radio and android builds/Battery.

Hello everyone.
The answer to my question can probably be found by scrolling trough hundreds of topics and posts, I guess this is a reasonable topic anyway since it’s a issue that will be the main reason for many users about when or if they can start using android on their hd2 as the main OS.
Thanks to everyone who contribute and good job!
I would very much like to start using android on daily base, but for me the battery has only lasted a couple of hours.
I’ve seen people claim to have up to 10 hours of battery with moderate calls and radio usage.
Please post your experience about power consume with your android build and radio rom.

I'm getting about 7 to 8 hours before it's dead. so wish i could get more

I went to sleep with 80% battery. 10hours later I awoke with 0%.
However, I did forget to turn off Background Data, so that could explain the huge drain.

Either use SET-CPU, or what I use, JuiceDefender, This app (combined with the UltimateJuice Add-on) Gives me 2.5 X longer batterylife... It has a widget which actually shows you how much longer your battery will lasts. It also has schedule Data activation or Disconnection. And much more options, i really love it!!!
It is basically the same as SetCPU only with far more options and not as complicated!
hope this helps
My device lasts for about 24 hours, with periods of 15-30min excessive use..

I'm getting surprisingly good battery on my HD2 running Froyo V1 by darkstone, my radio is: 2.12.50.02_2 and I'm running Energyrom
I get about 1 days worth of battery on average use (about 30-40 mins of calls, 2.5-3 hours of wifi, 1 hour of gaming)
Yesterday I had wifi on for 5.5 straight hours downloading games and then playing the, in these 5.5 hours my battery dropped 50%.
Today I'm trying an overclocking widget that I set to have the processor running at 200Mhz while screen is off, and running between 200Mhz and 1Ghz when screen is on, I'll see if that helps with the battery.

MMAwarrior said:
Either use SET-CPU, or what I use, JuiceDefender, This app (combined with the UltimateJuice Add-on) Gives me 2.5 X longer batterylife... It has a widget which actually shows you how much longer your battery will lasts. It also has schedule Data activation or Disconnection. And much more options, i really love it!!!
It is basically the same as SetCPU only with far more options and not as complicated!
hope this helps
My device lasts for about 24 hours, with periods of 15-30min excessive use..
Click to expand...
Click to collapse
What he said. I'm also getting about 2x times the 'normal' battery usage.
@MMAwarrior: na-aper

vivalamoza said:
I'm getting surprisingly good battery on my HD2 running Froyo V1 by darkstone, my radio is: 2.12.50.02_2 and I'm running Energyrom
I get about 1 days worth of battery on average use (about 30-40 mins of calls, 2.5-3 hours of wifi, 1 hour of gaming)
Yesterday I had wifi on for 5.5 straight hours downloading games and then playing the, in these 5.5 hours my battery dropped 50%.
Today I'm trying an overclocking widget that I set to have the processor running at 200Mhz while screen is off, and running between 200Mhz and 1Ghz when screen is on, I'll see if that helps with the battery.
Click to expand...
Click to collapse
yet my HD2 running Froyo V1 by darkstone and radio is: 2.12.50.02_2, I'm running Energyrom too,and it die so quickly......

maseo said:
What he said. I'm also getting about 2x times the 'normal' battery usage.
@MMAwarrior: na-aper
Click to expand...
Click to collapse
I'm just a lil' faster maseo! Knowledge is key!

Current Widget and battery draw

So we all know that low numbers in current widget are good and high numbers are bad. Thing is, how do we interpret these numbers? I mean if my phone (HD2) is currently drawing 4ma how long should I expect it to last/how much percentage of the battery should it drop an hour?
What about when it's drawing 189?
How do you do the math to figure battery life out?
Its just been puzzling me...
Sent from my HTC HD2 using XDA App

Your battery is 1200mah, that's milliampere hour. So if you're drain 4ma, then it'll run at that rate for 1200mah/4ma = 300 hours. Same for your other numbers.

If only it would run at that rate consistently hey .

buzz killington said:
Your battery is 1200mah, that's milliampere hour. So if you're drain 4ma, then it'll run at that rate for 1200mah/4ma = 300 hours. Same for your other numbers.
Click to expand...
Click to collapse
Thanks alot! I thought about that, but I wasn't sure.
Sent from my HTC HD2 using XDA App

ClydeB1 said:
If only it would run at that rate consistently hey .
Click to expand...
Click to collapse
I dream of that day....
Sent from my HTC HD2 using XDA App

Use Battery Monitor Widget to get graphic charts

buzz killington said:
Your battery is 1200mah, that's milliampere hour. So if you're drain 4ma, then it'll run at that rate for 1200mah/4ma = 300 hours. Same for your other numbers.
Click to expand...
Click to collapse
Its actually 1230mah

the important thing is that it shoud have the minimal drain at standby moments ... becouse when using the device ... it gets as high as 450 ... on top spikes usualy 200 - 350 so dome nice man should think about minimizing the spikes when used.
By the way my girlfrind just bought a wildfire ...stock and it gets like in stand by 25 - 50 ma and when using 200-300.
Mine with nand android gets like 2 - 5 ma with some little spikes at 30 sometimes.
pretty cool

Indeed it is ! i have both a desire and a hd2, i used the desire for months while waiting for magldr, that things never idled below 20ma to 40ma and with the screen on was usually 350ma to 400ma
now the HD2 with a bigger screen uses less, like 150ma to 250ma and sleeps on under 5ma lol !
the desire may have more battery (1400mah batt vs hd2 batt 1230mah) but it lasts allot longer thx to more efficient use.

One question from a noop.
If i enable bluetooth over different builds the battery drain is quit different.
With most of the HTC builds, like Desire HD i get a battery drain between 3 and 5 ma in standby. With Stock builds or CM builds i get 60 ma in standby?
Has anybody the same experiences or can explain this?
Best regards
trilu

same issue for me but i dont know why this happens

trilu said:
One question from a noop.
If i enable bluetooth over different builds the battery drain is quit different.
With most of the HTC builds, like Desire HD i get a battery drain between 3 and 5 ma in standby. With Stock builds or CM builds i get 60 ma in standby?
Has anybody the same experiences or can explain this?
Best regards
trilu
Click to expand...
Click to collapse
I had this with early HD builds too - I think it may be that it's not going into low power standby mode (just enough to keep connection active)?
Try wifi too - that should settle to 5/10ma if idle.

@ T.S.: You should try the Battery E.T.A. app: http://www.appbrain.com/app/battery-e-t-a/com.ac19.beta
This app shows you the current battery percentage + it displays a calculated "end of battery" time, based on your usage of the phone over the last day/2days/..

chris_ah1 said:
Try wifi too - that should settle to 5/10ma if idle.
Click to expand...
Click to collapse
That happened to me too with DHD builds and i've tried many things.. the solution to stop the heavy battery damage (sometimes) was just opening wifi and go Idle

So let me get this straight: it is normal for my device to have 400 mA when using it?

Anyone think it's possible to get those "top" ma's down? Because it's draining like 350 ma in full use.. would be cool if we get it below 200 or something Maybe with something like those ultra low voltage builds that you had on the sd android version?

benmeilink said:
Anyone think it's possible to get those "top" ma's down? Because it's draining like 350 ma in full use.. would be cool if we get it below 200 or something Maybe with something like those ultra low voltage builds that you had on the sd android version?
Click to expand...
Click to collapse
use setcpu and limit to like 400 mhz. it will be sluggish but u get your 200ma. also turn off backlight. but there's no point doing that.

Haha oke I get the 400 mhz.. but thats not what I was looking for

Visentinel said:
Indeed it is ! i have both a desire and a hd2, i used the desire for months while waiting for magldr, that things never idled below 20ma to 40ma and with the screen on was usually 350ma to 400ma
now the HD2 with a bigger screen uses less, like 150ma to 250ma and sleeps on under 5ma lol !
the desire may have more battery (1400mah batt vs hd2 batt 1230mah) but it lasts allot longer thx to more efficient use.
Click to expand...
Click to collapse
HD2 is the best Android phone on the market. Nothing compares to it besides the Evo and the build quality on those isn't as good as the HD2.

I've ran some tests before. With the phone idle and the screen at the dimmest setting, it drains about 100ma. Turn that up to full brightness and it goes up to 230ma. Phone calls have the screen off and it uses about 150ma or so. The rest is just how hard the phone have to work.
It's really not bad when you think about how much it does out of that little 1230ma battery. You can get close to 7 hours of talk or browsing at dim light. 12 hours of music playback, 250 hours of standby time. These are pretty good numbers. If you really need more than that in one day, you just need one of those extended batteries. I hear this one works pretty well in android without custom kernel
http://cgi.ebay.com/EXTENDED-BATTER...826653?pt=PDA_Accessories&hash=item2a0cf2365d

battery usage assessment

I decided to test - on my DHD with Current widget - how much electricity does different hardware parts and softwares use.
I test the battery usage with different brightness settings, wifi and mobile internet download, call, call over bluetooth, music, games, etc. I do it with stock battery, and with LeeDroid 1.4.1 (what is 1.72 based and uses stock kernel) Most tests made in flight mode to make as accurate as possible.
Now, the battery is 1230 mAh what is 1230 mA x 60 minutes = 73800 mAmin. It means if the phone uses 123 mA, than it would last 10 hours (123 mA x 10 h = 1230 mAh). And if the screen uses at least 73 mA, than ( 1230 mAh / 73 mA = 16,85 h ) it won't last more than 16,85 hours with screen on. And it means that only the screen is on on the lowest brightness. So don't expect more than 16,85 hours if you continously browse, play, chat, etc.
Screen:
In flight mode.
I took the lowest number, because the screen uses what it needs, and sometimes some process starts.
brightness---->usage
0%...............73 mA
15%.............76 mA
30%.............92 mA
45%.............107 mA
60%.............125 mA
75%.............149 mA
90%.............172 mA
100%...........191 mA
If nothing else uses much electricity, you can expect 10-15 h screen on, on average brightness.
Music:
In flight mode, screen off.
Normal text - speaker; bold text - headphones; normal text - active speakers
volume------>usage--------->usage---------->usage
0.................49 mA.............52 mA.............50,5 mA
5.................50 mA.............54 mA.............51,5 mA
10...............55 mA.............57 mA.............52,5 mA
15(max)........75 mA.............62 mA...............55 mA
It's enough for about 24 h music with volume on around 10 (in flight mode, screen off).
-Real life test:
Today morning I used my phone for listening music only. It playd music for 6,5 hours and it used 30% battery.
It is 4,6% per hour.
There was no flight mode or other special settings. Of course wifi, bluetooth, etc. were turned off.
It means, that it used 56,8 mA, what is quite good, and a full charge lasts for 21,5 hours with this usage.
Download:
Screen continously on lowest brightness, what uses 73 mA
wifi..............220 mA - 70 mA
3G...............300 mA - 70 mA
GPRS............100 mA - 70 mA
It took 30 sec to download over wifi and 3G, and it downloaded 10% in 6-8 min.
So I recommend wifi. Don't forget it at home!
Navigation:
Maps and 3G and GPRS
It used 350 mA with both settings.
I will test the Locations tomorrow and see if there's a big difference.
Games:
Low brightness.
Need for Speed - Shift ....................... 315 mA

nice...
Sent from my Desire HD using Tapatalk

Great. Going to monitor this using the xda app.
Sent from my Desire HD using XDA App

i'm constantly at 0 screen brightness and my battery won't last
unless you can test at negative values i think any test you perform is useless
sorry for being blunt but there's no nicer way to put it

Good job waiting for the results!

Any updates?
Sent from my Desire HD using XDA App

iAltair said:
Any updates?
Sent from my Desire HD using XDA App
Click to expand...
Click to collapse
testing music playing
first post will be updated in about 1 hour

first post updated

jeRrRKKKK said:
i'm constantly at 0 screen brightness and my battery won't last
unless you can test at negative values i think any test you perform is useless
sorry for being blunt but there's no nicer way to put it
Click to expand...
Click to collapse
Either you can't be arsed reading around to get optimum battery usage out of your DHD (wifi off when not in use, battery calibration etc) or you have a hardware fault! My battery easily lasts 15-18 hours of heavy usebetween charges (currently at 78% after 11 hours unplugged albeit with moderate use)

ghostofcain said:
Either you can't be arsed reading around to get optimum battery usage out of your DHD (wifi off when not in use, battery calibration etc) or you have a hardware fault! My battery easily lasts 15-18 hours of heavy usebetween charges (currently at 78% after 11 hours unplugged albeit with moderate use)
Click to expand...
Click to collapse
I'd relay like to know how you have achieved that kind of usage with heavy usage, I can get my DHD to last the day, but its always giving me 15% or worse warnings by 11pm after being unplugged at 9am. I don't use it excessively, bit of browsing, screen on auto, bit of music. The battery life has gotten way better since I got the phone. Does calibration name that much difference, I run the phone basically right the way down every day as it is.
Just be nice to use it as much as id like to (aka not use it and worry about it dying) and still last the day.

After doing the battery reset, I finaly got through the hole day with heavy use, without worying that my battery runs out. If you havent done it yet, do it! Tried diffrent methods, but the one that worked was the one that HTC recomended. Charge with phone on for 8 houres, unplugg charger, shut down, charge for one houre, unplug, turn on, wait two minutes, shut down and charge for one houre. Remember to disable the fastboot befor shutting down phone.
Sent from my Desire HD using XDA App

gamesmachine said:
I'd relay like to know how you have achieved that kind of usage with heavy usage, I can get my DHD to last the day, but its always giving me 15% or worse warnings by 11pm after being unplugged at 9am. I don't use it excessively, bit of browsing, screen on auto, bit of music. The battery life has gotten way better since I got the phone. Does calibration name that much difference, I run the phone basically right the way down every day as it is.
Just be nice to use it as much as id like to (aka not use it and worry about it dying) and still last the day.
Click to expand...
Click to collapse
Don't tell me!
I finish my morning job at noon (I start 5:30) and it's around 20% left.
I'm thinking of buying an 5000 mAh external battery. Than I would not worry about using as much as I want : )

Music seems to be using quite low of power.
Sent from my Desire HD using XDA App

gamesmachine said:
I'd relay like to know how you have achieved that kind of usage with heavy usage, I can get my DHD to last the day, but its always giving me 15% or worse warnings by 11pm after being unplugged at 9am. I don't use it excessively, bit of browsing, screen on auto, bit of music. The battery life has gotten way better since I got the phone. Does calibration name that much difference, I run the phone basically right the way down every day as it is.
Just be nice to use it as much as id like to (aka not use it and worry about it dying) and still last the day.
Click to expand...
Click to collapse
There are numerous posts in these forums where people have doubled their battery life by calibration, I won't claim any such results as I fiddle that much that I can't really pinpoint one factor, so yes it can I believe what is happening is that as the battery improves with charge cycles the dhd is assuming it's capacity remains the same so with calibration you are resetting the max charge level

first post updated with Download battery usage

I bought a Mugen 1300 mA battery...it's ever worse that the original one! :-(

Abies78 said:
I bought a Mugen 1300 mA battery...it's ever worse that the original one! :-(
Click to expand...
Click to collapse
yeah, last time I found a site where they test batteries, and as I remember only the stock batteries had as much power as it says.
I found it after a lil search:
http://batteryboss.org/
as you can see, it's not always the truth what is written on these custom batteries

Ran the HTC recommended calibration, still no improvement, if anything its worse. Android system process is eating my battery and I don't know why, 60% usage and my batt went from full to 15% warning in 4h
Sent from my Desire HD using XDA App

gamesmachine said:
Ran the HTC recommended calibration, still no improvement, if anything its worse. Android system process is eating my battery and I don't know why, 60% usage and my batt went from full to 15% warning in 4h
Sent from my Desire HD using XDA App
Click to expand...
Click to collapse
woa
what ROM do u use?

gamesmachine said:
Ran the HTC recommended calibration, still no improvement, if anything its worse. Android system process is eating my battery and I don't know why, 60% usage and my batt went from full to 15% warning in 4h
Sent from my Desire HD using XDA App
Click to expand...
Click to collapse
Can you list down the items under "Android System Process"? I am using my phone roughly the same way you mentioned on your other post but I'm at 8-hours with 80% left. Maybe you have an app doing the damage.

Stand-by consumption

Sorry for my bad english...
However, I installed "battery monitor widget" to see consumption in stand by ... I noticed that with no background applications, consumption is almost always around 100 mA ... to you?

You are able to see current readings in mA with battery monitor? Because so far the current widget does not seem to be working with this phone.
Regular standby current reading should be 5-10mA or so on the nexus one, desire, xperia arc, desire HD, so 100 mA is way too high.
Take some over night readings to confirm. It should be much less than 100 mA.

How would you go about finding this out.
What would be classed as normal standby use - I reckon mine is using 2 - 3% per hour as long as wifi is disabled.

RogerPodacter said:
You are able to see current readings in mA with battery monitor? Because so far the current widget does not seem to be working with this phone.
Regular standby current reading should be 5-10mA or so on yje nexus one, desire, xperia arc, desire HD, so 100 mA is way too high.
Take some over night readings to confirm. It should be much less than 100 mA.
Click to expand...
Click to collapse
Can you try in your SGS2?

I'm using that app and without any application running in the background it show 1-2mA but when I start using whatsapp, FB, Twitter etc it show 20-25mA.

Thanks... other feedback?

What app, name please?

deli_gt said:
What app, name please?
Click to expand...
Click to collapse
Battery Monitor Widget by "3c06".

I use juice defender, so with everything syncing but data only enabled every 30mins, i lose 1% an hour on standby...
without i'd say about 2%, as most apps only sync every 15mins or 30min anyways, other than push email, which of course depends on how popular you are lol
Dickie

Leggenda said:
Sorry for my bad english...
However, I installed "battery monitor widget" to see consumption in stand by ... I noticed that with no background applications, consumption is almost always around 100 mA ... to you?
Click to expand...
Click to collapse
i figured out that wifi on has lower mA value than 3g. on all my ex phones it was different.
i now switched off wifi, switched off mobile data via apndroid and the mA dropped down to 5.
will now install juice defender and wait for a fix from anyone.
sent from my SGSII via Tapatalk

walda said:
i figured out that wifi on has lower mA value than 3g. on all my ex phones it was different.
i now switched off wifi, switched off mobile data via apndroid and the mA dropped down to 5.
will now install juice defender and wait for a fix from anyone.
sent from my SGSII via Tapatalk
Click to expand...
Click to collapse
on every phone i have owned, wifi was always better than 3G. on wifi the power draw stays at 6mA for me. on 3G it is higher. always been like this on my nexus one, desire, etc. nothing new.
what IS good news is that the SGS2 outputs current readings. i'm surprised any apps are able to find the current reading so soon though. usually they have to be updated for the new phone model.

Post your CM10 BASED ROM battery life! And some tricks and tips

I saw a similar topic in the atrix section and it looks very useful, so I searched the samsung forum but found nothing. Therefore I created this. Feel free to post your CM10 based rom battery life.
This is more for trouble shooting and sharing tips and tricks to extend the CM10 battery life. Also post some screenshots to show us your battery life, one of tour screen on time and one for your overall usage

Thebyani ROM 4.1.1 very good battery life.
Inviato dal mio GT-I9100 con Tapatalk 2

Testing RRemix

I get a drain of 4-5% per hour on CM10 which isn't normal. According to BBS I don't see any excessive wakelocks, also battery stats in settings shows phone sleeping.
I tried a lot of different things to see if the drain reduces. Finally when i changed 3G to 2G the drain reduced.
I know 3G consumes more battery than 2G, but this drain was excessive and nothing like I saw on Stock or CM9 ROM's.

I'm using PA 1.98 and Siyah 4.0.1. I feel this is a very good combination in terms of battery life and performance.
On a full charge, I easily get around 20hrs on medium-heavy usage. I used Lux AB to control brightness and VC just for reference to check on deepsleep and cpu states. I also used battery widget reborn beta for its cool stats and auto flight mode control. Disabled all haptic feedback and vibration alerts cos I could just use a low-volume profile. Disabled hardware keys backlight(if i can find the home button in the dark, no prob finding the rest)
Edit: I use stock 1650mah battery
In extweaks, I set battery profile with the following settings:
CPU
Gentle_Fair_Sleepers - on
arch_power - on
CPU Hotplug (default)
CFS - Linux kernel defaults
CPU Idle - AFTR+LPA
Smooth scaling - 800MHz
Dual core mode
Sched_MC - 2
CPU Undervolting - -50mV
CPU Step Count - 18
Default Governor - ondemand
Scaling_Max - 1000000Mhz
Scaling_Min - 200000Mhz
GPU
Freq Step 1 - 40MHz
Freq Step 2 - 133MHz
Freq Step 3 - 267MHz
GPU Voltage 1 - 850mV
GPU Voltage 2 - 900mV
GPU Voltage 3 - 950mV
Thresholds - all defaults
GPU Staycounts - 1,1,1
Audio
Optional - I set to 3
Screen
Sensitivity - 3pixel
min_bl - 0
min_gamma - 0
max_gamma - 24
gamma shift - 0
vibration intensity - 0
mDNIe Negative Toggle - on
BLN
I don't need it so disabled
Misc
Android Logger - on
Scheduler - sio
Zram size - 150mb
charge current - option 2
USB Mass Storage Mode - Force MTP Mode
Exclusive Wakelock Stats - on
Autoinstall root - off

atulalvenkar:
Try Dream kernel:
http://forum.xda-developers.com/showthread.php?t=1788021
I have very good battery life with version 2.7.0 and CM10, but USB Mass storage isn't working. Also you can try newest Siyah.

atulalvenkar said:
I get a drain of 4-5% per hour on CM10 which isn't normal. According to BBS I don't see any excessive wakelocks, also battery stats in settings shows phone sleeping.
I tried a lot of different things to see if the drain reduces. Finally when i changed 3G to 2G the drain reduced.
I know 3G consumes more battery than 2G, but this drain was excessive and nothing like I saw on Stock or CM9 ROM's.
Click to expand...
Click to collapse
Yes, I experience the same. 3G draines the battery and much more than on any other ROM I ever used.

My battery is no better or worse that on other roms, i loose about 15% of battery an hour with half an hour use or so. Any screenshots anyone? Or tips, did anything improve your battery??

i using CM10 ,the battery consumption still bad compared to stock rom ICS..so,no different to me,LOL

Tiaso said:
i using CM10 ,the battery consumption still bad compared to stock rom ICS..so,no different to me,LOL
Click to expand...
Click to collapse
Which kernel do you use ?

atulalvenkar said:
I get a drain of 4-5% per hour on CM10 which isn't normal. According to BBS I don't see any excessive wakelocks, also battery stats in settings shows phone sleeping.
I tried a lot of different things to see if the drain reduces. Finally when i changed 3G to 2G the drain reduced.
I know 3G consumes more battery than 2G, but this drain was excessive and nothing like I saw on Stock or CM9 ROM's.
Click to expand...
Click to collapse
I get that in every ROM, even stock. I get half decent battery life now, deleted battery stats this morning so gona see how it goes tomorrow. It almost got me through the day though. I'm using extweaks to under volt my phone
Sent from my GT-I9100 using xda premium

MikeIliescu said:
I get that in every ROM, even stock. I get half decent battery life now, deleted battery stats this morning so gona see how it goes tomorrow. It almost got me through the day though. I'm using extweaks to under volt my phone
Sent from my GT-I9100 using xda premium
Click to expand...
Click to collapse
A drain of 8-10% per hour if you actively use is fine. But while sleeping my usual drain on stock /CM9 is about 1-2% per hour.
I think due to all the hacks that are required currently to get CM10 working with ICS closed binaries we have this battery issue.IF it was
an app BBS would have shown, if my phone had deep sleep issues, cpu spy should have shown but I don't get anything in either of these.

CM10 on Galaxy S2
I'm running the latest CM10 nightly build (20120906) for my Galaxy S2.
The ROM works blazingly fast and I haven't had any bugs as of yet :victory:
The battery life is quite poor however, I get around 11 hours from full battery to nearly dead with moderate-light usage.
Today I used Google Navigate with GPS and 3G for around 15 minutes and it chewed through around 15% in just 15 minutes :crying:
I really hope they fix the battery life as its the only thing holding this ROM back.

This was my rom drain on standby with cm10 pretty good in my opinion
Sent from my GT-I9100 using xda premium

shaunnicho said:
This was my rom drain on standby with cm10 pretty good in my opinion
Sent from my GT-I9100 using xda premium
Click to expand...
Click to collapse
That's pretty awesome. Care to share the build and if you did something else (other kernel, settings, anything)?

my phone has battery problem with CM10 too
battery dead 2x faster than CM9 Rom
specially when use Wifi or GPS
i never had my phone for more than 20 hour

I am using CM10 nightly 20121017. I have switched to CM10 nightly builds since two weeks. Before I was on stock 4.0.3 Greek Vodafone. Also I have tried a lot of custom ROMs.
In conclusion: with 3G on, WiFi keep alive, gmail, push exchange mail and all other notifications off (eg Facebook), all touch vibrations off, from 8am that I unplug the phone, it lasts max until 5pm. And this is Almost the same with all roms. :thumbdown:
This is a smartphone and in order to operate as a smartphone of consumes a lot of energy! I can get a Nokia 6310 to have just a phone that lasts for a week...
My opinion is that someone must produce better batteries!
Sent from my GT-I9100 using xda app-developers app

I hardly get a day of battery life. The most efficient battery saving technique which I realised was to put your phone into airplane mode when not in any use. I put my phone to airplane mode while I am asleep or I am attending classes. Amazing battery saving technique.
Other thing we can do is to use a cm10 version of rom with the memory leak issue fixed. If its not, you might even need to charge your phone even twice a day.
Disable 3G(use 2g only mode) when not using the web. 3g sucks a hell lot of battery.
Sent from my GT-I9100 using xda app-developers app

at the moment testing RR-Rom 3.0.9. Awesome smoothness and battery-life
best ROM so far :good:

Easy when you know what you're doing
http://forum.xda-developers.com/showpost.php?p=33094821&postcount=11815