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.

rom with best battery time

I need help to find the right rom. Im interestet in a rom where battery time is the most important ting.
Sent from my LG-P990 using XDA Premium App

Get a Sense based rom and use a low voltage kernel like a 875mV.
Just to give you a heads up, I recently tried GingerVillian 1.7 and 3 or 4 hours of music would drop the battery extremely heavily but this was because i was constantly checking the screen.
I switched back to a senseHD rom because there are more battery efficient kernels than on most AOSP roms. Now I'm using SupeROM HD (I like senseHD) with its stock kernel but if you wanted a longer battery life than the standard one then you could just flash the latest HAVS kernel that uses 875mV.

I would suggest whether Oxygen, Redux or Gingervillain for you. They have known for their superb battery time.

I use redux v1.1.1 (gingerbread) with a low voltage kernel (875mV). The battery lasts about two days when i use it normal.
What you even can do is make a screen off profile with setCPU and set the maximum and minimum frequency to 245MHz.
Best regards

What is more important? Using the right ROM or using the right kernel?
I'm using Leedroid right now, but I still am very unhappy with my battery life (barely lasts 1 day)
I might try one of the roms mentioned above.

I loaded Leedroid on my wifes desire last night, overnight it lost 3% with wifi on. Sofar today after couple of calls (3 outgoing and 5 incomming) and sms's its standing on 76%. Not a good test but only info.

I would recommend the mini sense Rom that's based on teppics stock Rom. I get 2 days out on my phone.
Sent from my HTC Desire using XDA App

For the RCMIXHD.
Salu2.

In my opinion, any AOSP Rom with low voltage kernel and using powersave mode
Sent from my HTC Desire using XDA App

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 .

Need stable Rom and kernel

I have been flashing time and getting same results. I love the way they look but I am looking for stabality and speed, and of course everything running. Hell, why not throw in compact using less space. Right now I'm running mikG- sense 2-1-v1.04. It's okay, but lacks speed, a drains battery. (no phone doesn't stay awake). So any Rom and kerenel come to mind that would fit my phone, please help, thanks.
Sent from my PC36100 using XDA Premium App

Uamore6 said:
I have been flashing time and getting same results. I love the way they look but I am looking for stabality and speed, and of course everything running. Hell, why not throw in compact using less space. Right now I'm running mikG- sense 2-1-v1.04. It's okay, but lacks speed, a drains battery. (no phone doesn't stay awake). So any Rom and kerenel come to mind that would fit my phone, please help, thanks.
Sent from my PC36100 using XDA Premium App
Click to expand...
Click to collapse
May I suggest SalvageMod v1.2.1? It's basically pure Gingerbread (AOSP) and it's fast, stable and everything works. Battery drainange, of course, is subjective and based on usage for the most part. You can download it here. May I also suggest you use either LauncherPro or ADW for even faster speeds?

Uamore6 said:
I have been flashing time and getting same results. I love the way they look but I am looking for stabality and speed, and of course everything running. Hell, why not throw in compact using less space. Right now I'm running mikG- sense 2-1-v1.04. It's okay, but lacks speed, a drains battery. (no phone doesn't stay awake). So any Rom and kerenel come to mind that would fit my phone, please help, thanks.
Sent from my PC36100 using XDA Premium App
Click to expand...
Click to collapse
I have CM7 nightly #107, Tiamat_Evo-v4.0.5, SetCPU, GoLauncherEX. This combination works very very fast. Everything works perfect except GPS, but you can download a permanet fix from
http://forum.xda-developers.com/showpost.php?p=14534313&postcount=2478

Uamore6 said:
I have been flashing time and getting same results. I love the way they look but I am looking for stabality and speed, and of course everything running. Hell, why not throw in compact using less space. Right now I'm running mikG- sense 2-1-v1.04. It's okay, but lacks speed, a drains battery. (no phone doesn't stay awake). So any Rom and kerenel come to mind that would fit my phone, please help, thanks.
Sent from my PC36100 using XDA Premium App
Click to expand...
Click to collapse
for any of the Gingerbread, Sense-based ROMs, battery life sux. hopefully the source code for the kernel will be released soon so that you can flash a custom kernel for those ROMs and make the battery life skyrocket!
as for space....i suggest using either VaelPak's Senseless ROM or any AOSP-based ROM (e.g. MIUI, CM7, Deck's, etc.). those usually take up less space compared to the Sense-based ones (VaelPak's is Sense-based but with sense taken out, hence "Senseless")
flash a custom kernel on top of those ROMs (netarchy for Vaelpak; CyanogenMODs, Tiamats, SavagedZen, etc. for any AOSP) and you will see improvement with battery life.

cg 112358 said:
for any of the Gingerbread, Sense-based ROMs, battery life sux. hopefully the source code for the kernel will be released soon so that you can flash a custom kernel for those ROMs and make the battery life skyrocket!
as for space....i suggest using either VaelPak's Senseless ROM or any AOSP-based ROM (e.g. MIUI, CM7, Deck's, etc.). those usually take up less space compared to the Sense-based ones (VaelPak's is Sense-based but with sense taken out, hence "Senseless")
flash a custom kernel on top of those ROMs (netarchy for Vaelpak; CyanogenMODs, Tiamats, SavagedZen, etc. for any AOSP) and you will see improvement with battery life.
Click to expand...
Click to collapse
You can have a great battery life, and speed improvement, in gb sense based roms like GingerAleV4 & MikG-v2.00, I tested it, I installed 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 1190-245 Performance Priority 45
*****************************

Heavy battery drain on Gingerbread

Hey Guys,
I've been trying out many roms in the last time and I've noticed that on every Gingerbread rom, the battery drain is much higher than on Froyo roms. That's weird, because I constantly hear of people's battery life getting better after switching to Gingerbread.
On Froyo, the standby consumption is at 5 mA. On Gingerbread it's 75 mA. On Froyo, I can surf the internet for 10 minutes and nothing changes, on Gingerbread the battery would lose 5%. With regular use, when the phone is full in the morning, it's almost every day empty 8 hours later.
I just want to have a Gingerbread Wildfire with decent battery life. I tried many roms, and even on CM7, battery life is horrible. Even on a clean install without any apps. What is going on there? Is it maybe the radio? Or the kernel? Do you experience similar drain?

Maybe CPU?
I dont know if this will help but Gingerbread roms often have overclock settings, have you used the overclock feature because this would most definatly reduce your battery life but otherwise im not too sure but i must say i was using Oxygen (Gingerbread) on my wildfire and the battery life was very bad compared to stock ruu roms, sorry if i didnt help :S

Any idea? Im about to upgrade to the gingerbread.

Bwfclew07 said:
I dont know if this will help but Gingerbread roms often have overclock settings, have you used the overclock feature because this would most definatly reduce your battery life
Click to expand...
Click to collapse
I know about that, but I don't overclocked my Wildfire. Just because the battery drain is heavy enough on regular CPU speed.
btc2003 said:
Any idea? Im about to upgrade to the gingerbread.
Click to expand...
Click to collapse
Just upgrade and see yourself, I heard about many Wildfire users with Gingerbread who got better battery performance than on Froyo. Unfortunately, I ain't one of these

After a new flash it's usual to have battery drain. After a few charges it will buff out.
Sent from my HTC Wildfire using XDA App

underclocking ur cpu is a propable way to go. actually using conservative governor in cpu settings, may help your battery efficiency. but before doing this, search for a thread concerning this matter. u can always give it a shot and see for yourself, decide later if you want to keep gingerbread or not.