Database Users

Best Battery-Saving Kernel

I'm currently using Cyanogen 6.0 RC3 with the Kernel that came with it, and I'm not too impressed with the battery - seems to be draining a lot when on stand by. Just curious on the best battery-saving Kernel out there that is stable and is great with battery percentages.

Try some of wildmonks UV kernels.

I'm also wondering about this. Im currently on kmobs #48 kernel. I have set cpu with profiles set up to under clock when screen is off. Anything else I could try. And no I don't want juice defender.
Sent from my Nexus One using Tapatalk

CM6 is a battery hog for some reason... try enoms...

lengz said:
Try some of wildmonks UV kernels.
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x2 i've been running 2.6.35.4_SVS-950mV_CFS_AXI_720p_1113MHz_082710.zip on the latest nightlys and battery life has been very good

Just flashed the 1190mhz WildMonk's Kernel and it seems to be a little laggy, can't comment on the battery usage though (I will tomorrow).
I've been reading and people are saying >1190mhz is very stable, but I've been seeing that people are clocking it much lower than 1190mhz (at 1133mhz). I don't care about the speed, I just want my phone to last longer, and to not crash.
Should I flash the 1133 instead of the 1190?

2.6.35.4_SVS-950mV_CFS_AXI_720p_1113MHz_082710 is extremely stable on CM6 & offers much better battery life than stock kernel.
I use it with GPRS/Wifi on full time, moderate browsing (about 1 hr), 20-25 SMS's sent, 50 SMS's received & around 1 hr of talk time. Leaves me with more than 30% juice even after 24 hrs.
To do better on battery life, avoid using the live wallpapers & use a black/dark
static wallpaper.
Cheers !

seventyfivein said:
2.6.35.4_SVS-950mV_CFS_AXI_720p_1113MHz_082710 is extremely stable on CM6 & offers much better battery life than stock kernel.
I use it with GPRS/Wifi on full time, moderate browsing (about 1 hr), 20-25 SMS's sent, 50 SMS's received & around 1 hr of talk time. Leaves me with more than 30% juice even after 24 hrs.
To do better on battery life, avoid using the live wallpapers & use a black/dark
static wallpaper.
Cheers !
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Click to collapse
CM6 Nightly from 9/7 DOUBLED my battery life and a few others in the thread. Haven't updated since. Last night I went to sleep at 3AM with 42% after first unplugging it @ 10:30AM

FishFan319 said:
CM6 Nightly from 9/7 DOUBLED my battery life and a few others in the thread. Haven't updated since. Last night I went to sleep at 3AM with 42% after first unplugging it @ 10:30AM
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How is it for stability?

FishFan319 said:
CM6 Nightly from 9/7 DOUBLED my battery life and a few others in the thread. Haven't updated since. Last night I went to sleep at 3AM with 42% after first unplugging it @ 10:30AM
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D'ya have a link?
I can only seem to get back as far as 9/10... Thanks!
Sent from my Nexus One by magic electricy-bubbles flying through the air...

ganna give this a shot now. thanks... i use to use intersect ravens kernels but since froyo came out i havent tried anything. i assume i just flash this.....

http://forum.xda-developers.com/showthread.php?t=693375

Battery life on latest CM Nightlies has been very impressive with the included kernel.

i saw him tweet this... whats CM nightlies?

Pershoot is number one, no question about it.
http://droidbasement.com/db-blog/
I have brightness at 100% full-time (Love it!), I have live wall papers 100% (Love it!) of the time and have 3g always with 2 Gmail accounts push via K-9.
GPS off, BT off. WiFi off.
I have CM6.0 with this kernel (1 month old version). It is OC, UV + Extra RAM with no HD(?).
I doubled my battery life on CM6 and very easy get 1 day out of it, almost never below 30% - from 7am to 11pm. I'm at 49% (midnight) with my average use.
If I stream radio, I drain about 15% per hour on 3g. I drain about 5% to read top 20 news on Engadget app (twice a day)
This is my second kernel from this developer. I used one with 2.1 and now with 2.2. I know I'm coming again for the new one when I feel I need to.
I do not limit my usage, as I WANT to kill my battery, but can't succeed.

TailsNeon556 said:
x2 i've been running 2.6.35.4_SVS-950mV_CFS_AXI_720p_1113MHz_082710.zip on the latest nightlys and battery life has been very good
Click to expand...
Click to collapse
this is the one i have gave a try and I am very impressed.

Anyone else getting terrible battery life on any Froyo Rom?

Is it just me? I really can't believe it is. I mean there isn't even 3G where I live so my phone is set to 2G permanently, yet I can't find a Froyo ROM to last even a day. Even with all my tweaks and minimalistic settings, no luck at all.
What has been your experience on any of the Froyo roms?

Anderdroids AOSPish is the first and only froyo rom I've flashed. I was running mostly either stock or bionix stuff prior to this. I'm now getting, by far, the best battery life I've experienced since buying my phone a few months back.
Maybe give it a try if you haven't already.

Same...with JI6 I get better battery life. Everyone else it seems like they get better battery life with 2.2

I am getting GREAT life with onyx r3.1. Screen shots attached. I went over 24 hours and still had 50% battery left. That was with light usage. I included display time to show that there was an hour and 42 minutes of "usage" and also included a systempanel shot showing that in standby, it has very little power consumption.

compared with my own usage, I get better life with Froyo. Mainly because of the google cloud for push notification for IM apps. before my IM app would drain the battery due to pulling.

gregc2009 said:
I am getting GREAT life with onyx r3.1. Screen shots attached. I went over 24 hours and still had 50% battery left. That was with light usage. I included display time to show that there was an hour and 42 minutes of "usage" and also included a systempanel shot showing that in standby, it has very little power consumption.
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where did u get 3.1 from? only v3 is released ,,

gregc2009 said:
I am getting GREAT life with onyx r3.1. Screen shots attached. I went over 24 hours and still had 50% battery left. That was with light usage. I included display time to show that there was an hour and 42 minutes of "usage" and also included a systempanel shot showing that in standby, it has very little power consumption.
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Very nice. I couldn't get more than 16 hours on onyx r3. Are you using 3 or 3.1?

i have gotten excellent battery life on all roms except macnut 12.

I'm also getting incredible battery life. Are you reconditioning?

sroach23 said:
i have gotten excellent battery life on all roms except macnut 12.
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how much of a difference are you getting?? i was getting amazing battery life with r10 and also with the very first leaked 2.2 from eugene. i just flashed r12 and just finished reconditioning my batters... just wondering what to expect.

I am using Onyx 3.1 from TWs site.
After reading the write up of how the battery works, I don't do any kind of conditioning and my battery has just gotten better.
Sent from my SGH-T959 using XDA App

When I ran 2.1 I had about 10 hours of life. Running Axura gives me about 12.
Sexed by Axura

axura is good when it comes to battery for me. i'm at 91% for 2 hours with 40 minutes of usage.
Sent from my SGH-T959 using XDA App

I think I am doing ok here....
14 hours with 2.5 hours of web browsing and 40 min phones calls, 2 hours 20 min on wifi

Extended battery for the vibrant
Use this and your battery life more than doubles. It is very comfortable, rubberized coating, and the battery rocks. The door is quite thin considering and fits comfortably in the hand. They are also going to make custom clear protectors for the entire phone and have them up for sale within 2 weeks.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=130448289815#ht_999wt_1139

sroach23 said:
i have gotten excellent battery life on all roms except macnut 12.
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Click to collapse
Same here. Flashed 12 yesterday and love it for everything EXCEPT the awful battery life.
Is there any other Froyo ROM that does not show text messages in the call log, because that's the biggest reason I am using Macnut 12 right now... ?

Ive been using the Odin Froy for almost a week and i get better battery life that stock JI6. I have yet to condition the battery so Im sure Ill get better after I do that. Ive had good luck so far with this.

it really does depend on the kernel you're using. I know TW for a lot of the newest releases uses a modified I9000 kernel, which causes battery drain, relatively speaking.
Check This out:
Yes, that is hr:mm. and my phone had been running for ~5 hours with only that much drop.

Shrivel said:
Same here. Flashed 12 yesterday and love it for everything EXCEPT the awful battery life.
Is there any other Froyo ROM that does not show text messages in the call log, because that's the biggest reason I am using Macnut 12 right now... ?
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Click to collapse
Eugene's Macnut R11 used the stock JK2 kernel and had amazing battery life. I just flashed back to it from R12 today. Right now the battery usage app is telling my I have 33 hours left as opposed to the 12-13 I it displayed with R12. There's something about the I9000 kernels that drains the battery while in sleep mode that nobody's been able to figure out yet.

geoffcorey said:
it really does depend on the kernel you're using. I know TW for a lot of the newest releases uses a modified I9000 kernel, which causes battery drain, relatively speaking.
Check This out:
Yes, that is hr:mm. and my phone had been running for ~5 hours with only that much drop.
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Click to collapse
Which rom are you running. Which kernal? I've been getting terrible battery life with v3.1 tw obsidian, by far the worst of all the roms I've tried. I'm barely getting 12-16 hours with light use. I was running fusion and getting excellent battery life.

Had awesome battery life, switched over to Trigger.

So I was running Bionix 1.3.1 and by the end of everyday, I have like ATLAEST 50% battery left.
And now that I've switched over to Trigger, it's only been 8 hrs and my batter is at like 59.
I mean it isn't that bad, but it doesn't compare at all to Bionix.
Yes, I've use the BatteryCalibration app on Trigger.

What modem are you using? Bionix 1.3.1 was KA7 I think while trigger is KB5. Those are fairly different modems with KB5 known for good data speed at the expense of battery life. Flash KA7 or whatever modem Bionix was using and see if it helps. Could also consider another kernel.

did you give it a couple of days?

The simple answer is that trigger is a amazingly awesome experience. You find yourself unable to put your phone down resulting in faster battery drain. I had the same problem.
Samsung Vibrant
Trigger 2.9.3

I can run the same bionix v 1.3.1 gaming all day and get 24hrs +. What modems/kernels are you using. And how can you know anything about a rom without giving it a week or so?
Sent from my badass t959 2543 quadrant, 20.193 linpack using bionix v 1.3.2 + bullet 1.42oc

Of all the roms I ever used Axura hands down was best battery life and best GPS
You must be lucky on Bionix I never god very good battery life out of it
Trigger Is pretty good I get 14 hrs with mod to heavy use and still above 50%
You may have you phone set up in a way that is causing some drain. Look at the Gallery, that often is a culprit.
If you do not like battery drain then I would advise you to stay away from 2.3 roms they use more battery for sure.....

Try the Bali 1.8.4 Kernel. It really helped my battery life. I use the KB1 Modem because that is what the developer of Bali was using. Not sure if I should be using KB5 or not, but it seems to work well with Trigger 3.2 Final. Smooth, fast with good battery life.
Edit: Thanks to the link on the OP, I'm going to try KB5 modem and see if there is a difference.

kwes1020 said:
I can run the same bionix v 1.3.1 gaming all day and get 24hrs +. What modems/kernels are you using. And how can you know anything about a rom without giving it a week or so?
Sent from my badass t959 2543 quadrant, 20.193 linpack using bionix v 1.3.2 + bullet 1.42oc
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Click to collapse
I was using this same Rom and Kernel and only got 1600 for a quadrant score and never got 24hrs of use out of it. It was more like 6 to 7 hours. Can you elaborate more on how you got such good battery life and scores? I had SetCpu running the OC and used TB to freeze unnecessary bloat, but still no love.

pdxmatts said:
I was using this same Rom and Kernel and only got 1600 for a quadrant score and never got 24hrs of use out of it. It was more like 6 to 7 hours. Can you elaborate more on how you got such good battery life and scores? I had SetCpu running the OC and used TB to freeze unnecessary bloat, but still no love.
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He was not gaming all day...guaranteed.
Display time is what it's about, which many people fail to mention.
The most display time you'll get on average is probably anywhere from 3.5 to 5 hours max on a basic 1500 mah battery. He probably got 24 hours with 3 to 4 hours display use. I assume with 6 to 7 hours of battery life, 4-5 of those are display?

Im running trigger 3.02 or something like that with the overstick 154 and wifi calling installed and running from8 to 5 and I get 3.4 to 4 % battery drain per hour. I feel that is really good with wifi calling. If I freeze wifi calling I drop to 2-3% per hour hour. I have my setup phone setup to sync all the time and 1min display time out. I normally get about a full day(24 hours) with wifi calling calling 8 hours with 1 hour or so of calls on both wifi and network and 30-40 txt meshours and 1-2 hours of gaming. Oh and the display is set to minimum. I felt those are pretty good numbers. But my fiancees nexus one on 2.3.4 gets 4 hours of non stop gaming and still has 20% battery left.

battery issues

Has anyone having issues with battery runs out drasticlly. Charge it and then with in minutes its dead. Get a full charge turn it off and back on then its dead.

I had that problem with my epic after flashing a custom rom. battery needs to be calibrated if it was not flashed at 100%. you can download battery calibration app from the market place.

Ya calibrate will help the readings but don't expect amazing battery. I have the seido expanded battery and it still can't make a day of heavy use.
Sent from my SPH-D700 using XDA App

i installed the syndicate frozen rom 1.1 and now enjoying a battery that still has life after return home from work (12-14 hours unplugged....medium use....about 40% remaining when i get home)

I'm using syndicate 1.2 with genocide 2.0 undervolted extensively on conservative and with the 3300 mAh battery I don't get that
AJ4VS said:
i installed the syndicate frozen rom 1.1 and now enjoying a battery that still has life after return home from work (12-14 hours unplugged....medium use....about 40% remaining when i get home)
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Sent from my SPH-D700 using XDA App

I had this issue on a few ROMs, specifically the Anonymous i3. I would charge all night and by the time I got to work (1.5 hours on the bus) I would have only 50% or less battery from listening either to Pandora or other music and with 4G off. It's infuriating. I have not calibrated my battery as of the moment, however I did go to the RandomRom and my battery life is phenomenal in comparison so I would recommend (and my recommendations carry no weight because I am nothing more than a casual user who only recently began rooting) looking at what you are running and checking battery drain on other ROMs.

Your specific issue is calibration. Its that simple, its misreading you battery status
Xiutehcuhtli said:
I had this issue on a few ROMs, specifically the Anonymous i3. I would charge all night and by the time I got to work (1.5 hours on the bus) I would have only 50% or less battery from listening either to Pandora or other music and with 4G off. It's infuriating. I have not calibrated my battery as of the moment, however I did go to the RandomRom and my battery life is phenomenal in comparison so I would recommend (and my recommendations carry no weight because I am nothing more than a casual user who only recently began rooting) looking at what you are running and checking battery drain on other ROMs.
Click to expand...
Click to collapse
Sent from my SPH-D700 using XDA App

I figured that was likely it, but never worried about it since I still got good usage without ever calibrating. The anonymous i3 is the only one that didn't have decent battery life for me. Random has been the best so far, gets me about 10 hours with basic use.
Sent from my SPH-D700 using XDA App

Bettet battery life rom?

Hey can someone please tell me in which rom the battery lasts longer???
Sent from my G2 using XDA

PLEASE search. You have 253 posts, you should know by now this is asked every single day

I'm on stock 2.3.4 rooted, and I just put my phone on the charger with 14 hours since last charge @ 56% battery. It was light to moderate use, will let you know tomorrow if it was a fluke. Sundays are light days, but Monday will tell the truth.
Sent from my T-Mobile G2 using XDA Premium App

21productionz said:
I'm on stock 2.3.4 rooted, and I just put my phone on the charger with 14 hours since last charge @ 56% battery. It was light to moderate use, will let you know tomorrow if it was a fluke. Sundays are light days, but Monday will tell the truth.
Sent from my T-Mobile G2 using XDA Premium App
Click to expand...
Click to collapse
That's what I'm using at the moment but I also what something more customizable rom
I was going to try cyanogenmod 7 but I don't know how is the battery in that rom!
Sent from my G2 using XDA

OMG I just flashed cm7 a while ago and the battery life is amazing!!!!!
I'm on xda for about five minutes and it hasn't changed from 100
Amazing!!!
Sent from my G2 via XDA running Cyanogenmod 7

Use coredroid 1.0 it has fantastic battery life. Its a sense Rom but it has the best battery life I've used on any Rom.
Sent from my Synergy Rom using XDA App

Battery life today was average. I got about 9 hours out of it. I had left wifi on though will test again tomorrow.
Sent from my T-Mobile G2 using XDA Premium App

my battery conservation method is simple:
- Turn on wifi and leave it on
- Set the phone to GSM only.
This almost doubled my battery life using stock HTC gingerbread.

Fludizz said:
my battery conservation method is simple:
- Turn on wifi and leave it on
- Set the phone to GSM only.
This almost doubled my battery life using stock HTC gingerbread.
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Click to collapse
Why would turning on wifi improve battery life?

The idle time on Unity is very good. I'm somewhere around day 2-3/4and just now getting to 50%
However when you're using it the battery tends to die pretty quick.

Pyromod! its amazing, I get about two days battery life.
I never worry anymore, If i'm going out of the house around 5 PM with 20 percent battery life, I'm good for the rest of the night and morning.

astriaos said:
The idle time on Unity is very good. I'm somewhere around day 2-3/4and just now getting to 50%
However when you're using it the battery tends to die pretty quick.
Click to expand...
Click to collapse
As is true with ANY rom you use lol.

Right now I'm using cm 7 and when its charged to 100 it stays in 100 for a long time than it drains pretty quick
Sent from my G2 via transperent XDA app running Cyanogenmod 7.1

Shadow_Android said:
Right now I'm using cm 7 and when its charged to 100 it stays in 100 for a long time than it drains pretty quick
Sent from my G2 via transperent XDA app running Cyanogenmod 7.1
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That's how it is. The firmware interacts with the battery in a way that any % over 90% is considered a full charge, so sometimes this comes away with the phone sitting at 100% for a long time (up to like 2 hours for me if I don't use the phone much), then draining normally. It doesn't drain fast, it just drains fast compared to the battery sitting at 100%.

martonikaj said:
As is true with ANY rom you use lol.
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Not true. CM6 had a drain rate of 3%/h on idle with no connections and me popping it on once or twice an hour to get a text.
Cm7 was around the same. All stock clock with downclock with the screen off to around 500mhz.
Unity's idle rate is only about 1%/3-4 hours. It's insane.

astriaos said:
Not true. CM6 had a drain rate of 3%/h on idle with no connections and me popping it on once or twice an hour to get a text.
Cm7 was around the same. All stock clock with downclock with the screen off to around 500mhz.
Unity's idle rate is only about 1%/3-4 hours. It's insane.
Click to expand...
Click to collapse
No, I mean you clearly are going to drain fast when using a phone compared to idle.
And any ROM with a proper kernel can be undervolted / underclocked with apps to disable data in order to drain less battery in idle.

Shadow_Android said:
OMG I just flashed cm7 a while ago and the battery life is amazing!!!!!
I'm on xda for about five minutes and it hasn't changed from 100
Amazing!!!
Click to expand...
Click to collapse
I can't tell if you're kidding or not, but the phones and ROMs I've seen all exhibit this behaviour. The OS will report the battery at 100% for a long time, as if the battery has more capacity than the OS knows about. A more accurate estimate would be to wait until you're at 99%, and then see how fast the meter drops. Better yet would be to use something like Current Widget or Battery Monitor Widget to record real-time current draw, then calculate how much energy has been consumed.
I wish there was a way to calibrate what "100%" actually means, but I don't think that is possible, since it is a hardware limitation.