Develop Bugs

Battery Kernel

I just rooted my DInc today and I heard about a kernel that ups the battery life. Is there such a thing, and if so, can someone point me in the right direction? Thanks in advance

Most kernels try to improve battery life. Are you running a sense rom or aosp rom?

If you're talking about Savage kernel, be careful... that thing uses an SBC (super battery charging) mod that can potentially harm your device in the long run. I personally am using VirusROM 1.5.1 with its stock kernel and have seen better battery life than SBC, but that's just me.
Sent from my HTC Incredible running VirusROM 1.5.1.

http://forum.xda-developers.com/showthread.php?t=848453
With this kernel my battery quite literally does not go down when it's sleeping (screen off), unless I'm in an area with bad reception. Screen on is also somewhat better than stock - it's hard to improve screen on at all, since that uses the CPU pretty aggressively. However, it does use improved scaling to always try and minimize the CPU load while keeping performance up. All that + HAVS (Hybrid Adaptive Voltage Scaling, which lowers the amount of power the CPU is drawing) = win battery life

Atlas.rouge said:
If you're talking about Savage kernel, be careful... that thing uses an SBC (super battery charging) mod that can potentially harm your device in the long run. I personally am using VirusROM 1.5.1 with its stock kernel and have seen better battery life than SBC, but that's just me.
Sent from my HTC Incredible running VirusROM 1.5.1.
Click to expand...
Click to collapse
The superior battery charging kernals will not harm your device, but instead may shorten the life of your battery over time. But at 15 dollars a battery, some believe it to a negligible side effect. Its all personal preference, really.
Sent from my ADR6300 using XDA App

How exactly do I go about installing the kernel? Sorry for such a n00b question, but I only did this today.

Futur Innovations said:
How exactly do I go about installing the kernel? Sorry for such a n00b question, but I only did this today.
Click to expand...
Click to collapse
If you're sticking with the stock ROM then search for a Sense based kernel, then read the OP and associated reviews in the comments following to learn how to install it, current features (what works and what doesn't) and any other possible info you'd need.
If you're planning on installing a different ROM, those already have kernels baked in, so give that a shot first and then try other kernels if you feel the need.
DInc/XDA App

I've had EXCELLENT results with the kernel from Myn's Warm TwoPointTwo RLS5 (NOT 5.2)
I forgot which one it was though... D: I think it was the ziggy 12/19...?

Kernels for Battery
I use the Newest Ziggy Kernel (BFS) with SetCPU set at conservative.
=Great Battery life !!
This kernel also enables other options like SmartASS and Performance, but conservative is a winner for battery life.

Sense Rom with good battery life

So guys, i definitely need a sense rom because of the look ( especially the music player, 3.0 lockscreen like in insertcoin and apps) and the fast writing speed of my sd card...
i tried leedroid, rc hd mix, maybe a froyo rom would be better? Or recoment a different kernel?
currently i use insertcoin ( newest stable release), but the battery is so bad i can hardly get a day out with normal use... wifi gps off brioghtness low...
can u tell me a good rom? would appreciate it

I find al GB ROMS have poor battery life then I changed the kernel to MANU's and it was much much better. Maybe try a different kernel?

can u recommend me a kernel?

Yeah this one is really good for me but is different experience for every user...
http://forum.xda-developers.com/showthread.php?t=883598
Gingerbread-HAVS-AXI-CFS

Thx dude, i'll try this.
But i gotta 2 questions:
Can i return to my standart kernel (insertcoin eg) and how can i do this?
Is this kernel also compatible with insertcoin? (sense- based)

With Gingerbread I think the Reflex S is pretty OK for the battery or else it is possible to undervolt further.
Maybe you just need to calibrate your battery, if you change your ROM a lot. I use BatteryCalibration from Market and it seem to do the job.

Do i have to do a full wipe?
Battery calibration does not work for me D the percentage drop fast to 99% percent again and so on

Yeah, I would do a full wipe. Especially if you are moving between different ROM's.
So far, the AuraxTsense 8.4 (Android 2.2) was my favorite in terms of battery usage - but since moving to 2.3.3 based ROM's, my battery drops faster when using the phone, but lasts longer when in standby.

what would u recomment then? returning to froyo or stay with gingerbread?

Well, if Battery Life is your primary concern, you would probably get the best results with a Froyo ROM, since the kernels are further in development.
However, in terms of features etc. I think the Gingerbread is better. I personally like the Sense 3.0 improvements etc. So I am just crossing my fingers that battery life will gradually improve further

My experience is, that Gingerbread ROMs in general are battery hungry. As for sense ROMs i can say that LeeDroid suits me best regarding battery life. At the moment im on oxygen and get a day out of it with normal use.
Best results with battery life i had with LeeDroid Froyo ROM (v2.4 i think). Smartass governor and screen off - 245mhz max/min sometimes got me 2 days without charging.
Maybe this helps you finding a solution.

By the way, you can also improve your battery life by turning off the various Auto Sync features, for example Sense Sync, Facebook, Weather etc...

So i've flashed reflex s now, hoping the battery will do better tahn insertcoin.
If not, i will probably change to leedroid froyo- are there any important disadvantages for froyo roms? like speed or something?

i've tried many sense roms and never got a good battery life
now using MIUI rom .. its GUI is close to sense and good battery life

24h and i still have 40% off battery on InsertCoin 1.0.8 CM7,wifi is always on,data is enable,set brightness to auto. Try charge your desire to 100% turn it off,connect charger again and wait till green led is up,than turn on your phone to fastboot menu (power and volume down) and clean battery stats,reeboot.Also You can use battery calibration app from market
Sent from my HTC Desire using Tapatalk

Hi
I use manu 2.0 cfs kernel and it is batterie efficient, most of time 48h before recharging.
Franck
Sent from my HTC Desire using XDA App

franckleroy said:
Hi
I use manu 2.0 cfs kernel and it is batterie efficient, most of time 48h before recharging.
Franck
Sent from my HTC Desire using XDA App
Click to expand...
Click to collapse
thx c: which rom do ya use?

At first, the recommended manu kernel won't be working with sense roms, because it's an aosp kernel (so made for aosp roms).
Second, using setcpu and setting a screen off profile for it really improves standby battery power. I set it mine to:
128 - 442 mhz ondemand governor
Third, the display is the biggest and fastest battery drainer, no matter which rom you are using.

k-c-0 said:
My experience is, that Gingerbread ROMs in general are battery hungry. As for sense ROMs i can say that LeeDroid suits me best regarding battery life. At the moment im on oxygen and get a day out of it with normal use.
Best results with battery life i had with LeeDroid Froyo ROM (v2.4 i think). Smartass governor and screen off - 245mhz max/min sometimes got me 2 days without charging.
Maybe this helps you finding a solution.
Click to expand...
Click to collapse
If you use smartass governor, you do not have to set an extra profile for screen off. This governor automatically uses the min cpu frequency when the screen is off.
smartass governor – is based on the concept of the interactive governor.
I have always agreed that in theory the way interactive works – by taking over the idle loop – is very attractive. I have never managed to tweak it so it would behave decently in real life. Smartass is a complete rewrite of the code plus more. I think its a success. Performance is on par with the “old” minmax and I think smartass is a bit more responsive. Battery life is hard to quantify precisely but it does spend much more time at the lower frequencies.
Smartass will also cap the max frequency when sleeping to 352Mhz (or if your min frequency is higher than 352 – why?! – it will cap it to your min frequency). Lets take for example the 528/176 kernel, it will sleep at 352/176. No need for sleep profiles any more!
Click to expand...
Click to collapse
http://www.ziggy471.com/2010/11/07/smartass-governor-info/

I am having the same problem with GB roms no matter how many times you calibrate the battery there is no improvement .

[Q] Stable ROMs besides Fresh, CM7, MIUI - Which to Choose?

I know "to each their own" is the general answer to the question of best ROM, but I wanted some suggestions on some others to try out. After all, why root if you're not going to play around with all the cool mods and ROMs out there?
I've been rooted for about 8 months now. Started with Fresh for the first 4-5 months and loved it for its stability, but it was lacking the "cool" feeling to me.
So I went over to CM7 after much hype from Lifehacker and Engadget, etc. I did not want to switch to CM until they had their 4G issues worked out - I live in Dallas and we have a strong 4G network, so I want to take advantage of the extra $10/month I'm paying.
I played around with MIUI for a day or two and loved the feel of it, but of course no 4G support, so back to CM7 with me.
I think CM might be what I stick with ultimately - awesome community backing and update support, plus all the kinks are just about worked out with wifi/4G/GPS. Nevertheless, I'd like to try another ROM with these features:
4G is a must.
GPS - Like I said, I live in Dallas... Been here for years and still have to use Google Maps on a daily basis to get around.
No wifi issues - I spend probably 75% of my time within wifi range.
Speed - This may also be a function of kernel, but who likes to wait 10 seconds for your app to open?
Battery life - Not a priority over speed of course, but a 2 hour battery life just makes me look bad when my gf's iPhone can pull 16+ hours. I'm out to prove her wrong.
Thanks for the help.

I too was an avid fresh rom user. meow I love mikG v1.03 with sense 2.1 and touches of sense 3.0.
Sent from my PC36100 using XDA Premium App

I absolutely agree. I was also avid Fresh, went to CM 7, now to MikG and with Sense 3.0 it is really really nice and very stable.

I've tried using CM7, but I am not an AOSP enthusiast..
sent from Jebus's butt!

Mikg v1.03 definitely everything is working for me been on it for 2 days now batterys not to bad for a stock kernel either I get about 9 hours of heavy use out of it.
Sent from my PC36100 using XDA App

I also was used to fresh when i first rooted, probably because of the functionality, but the updates and battery life for me were what made me switch to CM7, 7 hours for battery life with no use at all is just sad. I think i want to try something new too but i hate setting up my roms after flashing... I might try somehting new though

Decks. Its really, really fast, everything works, and battery life is awesome
Sent from my Xoom using XDA Premium App

mikvg rom is prettystable

Adding to the pile of MikG Sense 2.1+3.0 recommendations. It's definitely not lacking in the "cool" department and I've been actually amazed at its stability. I figured that since it's based on a port from the Evo Shift that it would have weird issues, but I actually haven't run into any yet. It just works for me.

Zac95 said:
Decks. Its really, really fast, everything works, and battery life is awesome
Sent from my Xoom using XDA Premium App
Click to expand...
Click to collapse
+1
Midget tossing is a habit...2010 Midwest champion...hw 001

MikG v1.03 very stable everything works
Sent from my PC36100 using XDA Premium App

Stable, 100% all working, speed, perfect gps. You have more than 1 choice:
1- CM7 nightly #107 (AOSP 2.3.4), Tiamat_Evo-v4.0.5, SetCPU with following settings:
*****************************
Optimized Values (*=On x=Off):
Main:
998400-245000 Performance *Set on Boot
Profiles:
*Enable xNotifications
- Screen Off 245-245 PowerSave Priority 100
- Temp > 42C 245-245 PowerSave Priority 95
- Battery < 25% 460-245 PowerSave Priority 90
- Battery < 70% 883-245 Interactive Priority 65
- Battery < 85% 960-245 Interactive Priority 55
- Charging 1190-245 Performance Priority 45
*****************************
GPS permanent fix:
http://forum.xda-developers.com/showpost.php?p=14534313&postcount=2478
2- GingerAleV4 or MikG-v2.00 (GB 2.3.3 sense 2.1), SetCPU with following settings:
*****************************
Optimized Values (*=On x=Off):
Main:
998400-245000 Performance *Set on Boot
Profiles:
*Enable xNotifications
- Screen Off 245-245 PowerSave Priority 100
- Temp > 42C 245-245 PowerSave Priority 95
- Battery < 25% 460-245 PowerSave Priority 90
- Battery < 70% 883-245 OnDemand Priority 65
- Battery < 85% 960-245 OnDemand Priority 55
- Charging 998-245 Performance Priority 45
*****************************

I've been using Decks ROM since about March and I can't see myself on another ROM at this point. You get spoiled by the battery life that's for sure. Solid as a rock too.
It's a pretty bare ROM. No fancy launchers or themes etc... It's a great blank canvas to work with.

Vaelpak is a good one too

New to Evo 4g From Epic 4g- Battery Life Stinks - WHy is Epic 4g so differenT?

I've been reading around the forums in different threads and Man there is a lot to catch up on since I've always been an Epic 4g owner and not an Evo 4g owner. I've found a few threads about battery life and so far have installed 4 roms to test briefly battery life and none are giving me the same as my epic or close to it which was 0-2% drop an hour when Idle.(Sitting on my desk on 3g or wifi) Gone through cm7, Miui(Currently on) and 2 of the new sense 3.0-3.5 roms (Energy and nocturnal)
Kernel currently Tiamat 3.3.7 and I've tried the latest one 4.0.1 or something.
So far i've found the Vipermod kernel undervolt tweak, V6supercharger Option 7 (used before), 3g turbo charge script, and also applying gps fix from Miui thread.
Any suggestions on other tweaks I should flash ? Is myns tweak out dated or needed from this thread? http://www.xda-developers.com/android/tweaks-for-superb-battery-life-in-evo/
I always freeze DRM but with the epic I found other processes starting with SNS to freeze, are these not on the Evo4g? or are they called something different? Also I don't see a System Update process that I used to see on the Epic and would freeze.
Calibrated method I use is charging to 100 percent and just using the Battery Calibrate app in the market. Its the first one that comes up when you search.
Any rom suggestions that I should flash to get better battery life? I need to use my phone for pleasure and work so everything needs to work except 4g and video recoding 720p. I need everything else operational.
Also any suggestions on other battery saving techniques would be greatly appreciated. I've got plenty experience with the Epic 4g but the evo 4g is so old school i feel like this device loves to eat battery way more than the epic when being used and when not being used.
FYI i have a moderate to heavy user.
EDIT: for those who could gain from this post, I'm going to be following Carhaulers recommended settings. Hopefully i get better battery life and everything runs smooth.
GB-evo-deck 1.3d or MIUI's latest creation
Tiamat v3.3.7-SBC aka the "LEE" kernel
Under Clocked @ 128/499MHz <<128/499MHz IS the new 245/998MHz>>
Under Volted @ -100mV total w/ IncrediControl

Results SO far and a Sense Question.
So as an answer to my own Question i've added the following items in my signature for my Evo 4g and I have no idea how this phone is operating so well at 128 HZ - 499HZ but wow its working smoothly. Battery is pretty sweet also. Still calibrating, drained it completely today and am charging right now to full with it powered off. Only time will tell.
I've had the phone off the charger for roughly 20 hours with no use for 50 percent of the time and the other 50 percent I was playing pandora, browsing xda/engadget, and playing 30-minutes to an hour of games. Not bad so far. Its better than it was before. Now this goes to saying i am uving like a mofo and underclocking.
New Question for those who read this, Is there a Sense Rom that will give equal if not better battery than what i'm seeing so far? and does COD tweaks work with sense roms?

MikG 2.61 rom works great and has great battery. Might want to try out Chopsuey 9.2.7 kernel with it as well.
Sent from my PC36100 using xda premium

My Sense guide has some helpful tips, link is in my sig
My daily driver right now: MikG 3.0 beta found here. Pair it with latest ChopSuey kernel, and you're good to go.
C-o-D tweaks do work with Sense ROMs, just look at the top for adjusted values for Sense

Well im not so sure about this but.
Isnt the epic still on froyo?
Cause in my experience all the old froyo roms for the evo gave me way better battery life than the gingerbread roms.
I could get like 24-30 hours on myns warmtwopointtwo rom. Which is froyo. I only get anywhere from 12-15 hours on all the new gb roms.
Just my 2 cents
Sent from my PC36100 using Tapatalk

r.storm85 said:
Well im not so sure about this but.
Isnt the epic still on froyo?
Cause in my experience all the old froyo roms for the evo gave me way better battery life than the gingerbread roms.
I could get like 24-30 hours on myns warmtwopointtwo rom. Which is froyo. I only get anywhere from 12-15 hours on all the new gb roms.
Just my 2 cents
Sent from my PC36100 using Tapatalk
Click to expand...
Click to collapse
The Epic's up to Gingerbread now, as of early November (finally). Froyo ROMs did get excellent battery life... I did like Myn's Warm TwoPointTwo, paired with a Netarchy SBC kernel... An incredible combination. I can still match that on Gingerbread, but Warm was awesome.

r.storm85 said:
Well im not so sure about this but.
Isnt the epic still on froyo?
Cause in my experience all the old froyo roms for the evo gave me way better battery life than the gingerbread roms.
I could get like 24-30 hours on myns warmtwopointtwo rom. Which is froyo. I only get anywhere from 12-15 hours on all the new gb roms.
Just my 2 cents
Sent from my PC36100 using Tapatalk
Click to expand...
Click to collapse
Did you calibrate your battery? Because I can get better your froyo battery life on aosp/gingerbread/ICS.

tropicalbrit said:
My Sense guide has some helpful tips, link is in my sig
My daily driver right now: MikG 3.0 beta found here. Pair it with latest ChopSuey kernel, and you're good to go.
C-o-D tweaks do work with Sense ROMs, just look at the top for adjusted values for Sense
Click to expand...
Click to collapse
hmm, might give this a shot giving this gingerdeck a full 72 hours before switch. whats your kernel tweaks at on miks rom? whats your battery percentage drop per hour when idle?
Sent from my PC36100 using xda premium

teh roxxorz said:
Did you calibrate your battery? Because I can get better your froyo battery life on aosp/gingerbread/ICS.
Click to expand...
Click to collapse
Actually i havent..i was kinda obsessed with battery life before. But ive been kinda lazy with my phone since gb roms came out!! I need to do it just havent got around to it.
Sent from my PC36100 using Tapatalk

tropicalbrit said:
My Sense guide has some helpful tips, link is in my sig
My daily driver right now: MikG 3.0 beta found here. Pair it with latest ChopSuey kernel, and you're good to go.
C-o-D tweaks do work with Sense ROMs, just look at the top for adjusted values for Sense
Click to expand...
Click to collapse
I'm running into a problem with COD Tweaks, need assistance.
Currently have Energy Rom installed with Latest Chop Suey experimental and the COD Tweaks IO "Deadline" option is not available, i only see bfq and noop. Which do I choose? and Also I don't see smartass v2 or smartass in daemon control? Am I missing something?

juanaraya92679 said:
I'm running into a problem with COD Tweaks, need assistance.
Currently have Energy Rom installed with Latest Chop Suey experimental and the COD Tweaks IO "Deadline" option is not available, i only see bfq and noop. Which do I choose? and Also I don't see smartass v2 or smartass in daemon control? Am I missing something?
Click to expand...
Click to collapse
Chopsuey doesn't have the smartass governor but the freedom kernels have smartass
Sent from my PC36100 using XDA App

evo4gnoob said:
Chopsuey doesn't have the smartass governor but the freedom kernels have smartass
Sent from my PC36100 using XDA App
Click to expand...
Click to collapse
ahh, ok how about for the IO scheduler do I set to noop or BFQ and Noop? in COD Tweaks at the top it doesn't tell you how to set your OOM Values? I've used v6 script manager before, should I do it through there?

juanaraya92679 said:
So as an answer to my own Question i've added the following items in my signature for my Evo 4g and I have no idea how this phone is operating so well at 128 HZ - 499HZ but wow its working smoothly. Battery is pretty sweet also. Still calibrating, drained it completely today and am charging right now to full with it powered off. Only time will tell.
I've had the phone off the charger for roughly 20 hours with no use for 50 percent of the time and the other 50 percent I was playing pandora, browsing xda/engadget, and playing 30-minutes to an hour of games. Not bad so far. Its better than it was before. Now this goes to saying i am uving like a mofo and underclocking.
New Question for those who read this, Is there a Sense Rom that will give equal if not better battery than what i'm seeing so far? and does COD tweaks work with sense roms?
Click to expand...
Click to collapse
If your really interested in battery life Energy Sensation XL 3.5 sense is awesome and very stable. I am currently running ics-decks-pre-alpha7 and really liking the battery life but you will have to give up ur camera until there is a alpha or beta version.

juanaraya92679 said:
ahh, ok how about for the IO scheduler do I set to noop or BFQ and Noop? in COD Tweaks at the top it doesn't tell you how to set your OOM Values? I've used v6 script manager before, should I do it through there?
Click to expand...
Click to collapse
Choose BFQ between the two. And the information at the top is only adjusted values. You have to continue reading, they have pictures included to help you along
Sent from my NookColor using xda premium

Better battery life on Sense rom rather than AOSP?

So i've been a Miui user for a while and decided to try a Sense 3.5 rom.
Running with this rom for a few months, I've noticed it having much better battery life than i hear people complaining about.
Anyways, i decided to go back to Miui to see the new changes, but the battery life is rubbish compared to my Sense rom..
My Miui rom goes around 20-25 hours, with Miui_au and ManU 2.1 kernel, and my sense goes 25-40 hours! Rom is GFan-BlissAIO with gingercakes 0.8e kernel.
Miui underclocked 128-844 mhz
Sense 128-998 undervolted with 25 mv at each frequency.
Is my settings which is the reason, cause aosp should be more battery preserving shouldn't it?
Sent from my HTC Desire using XDA App

so are you or are you not undervolting ManU? if you're not thats probably the reason.
I always find 1.4 a bit better for battery.

No undervolting the ManU, seeing no apps seem to allow me to. Tried andrev_oc, with the daemon controller and several other apps on the market, no luck.
Anyways thanks for the quick reply mate
Sent from my HTC Desire using XDA App

Yep... I find my own stock gingerbread sense is much better on battery life on standby than aosp roms... Regardless of under volt. When I'm using the phone its about the same.
Use incredicontrol for manu undervolt.