Database Users

SetCPU...Beneficial for Battery Life?

I've seen a few different posts in some of the kernel threads debating whether SetCPU is helping or hurting battery life. SO, I'm just kind of curious to see what results are on a larger scale? Based on your own experiences, do you have SetCPU installed and if so, does it help or hurt battery life generally? Also, if you do have it installed, do you use profiles? What are the most beneficial settings to use?

1. Not in right section
2. SetCPU not intended for battery life
3. It only adjusts CPU clockspeed
4. This thread is mostly meaningless

5. It's been discussed ad nauseam.

charnsingh_online said:
1. Not in right section
2. SetCPU not intended for battery life
3. It only adjusts CPU clockspeed
4. This thread is mostly meaningless
Click to expand...
Click to collapse
SetCPU is not intended for battery life? Go to the Market and look at the description. If I posted this in the wrong section I apoligize. But, I think you are mistaken with your comment about SetCPU not being intended to increase battery life or increase performance...

THATTON said:
SetCPU is not intended for battery life? Go to the Market and look at the description. If I posted this in the wrong section I apoligize. But, I think you are mistaken with your comment about SetCPU not being intended to increase battery life or increase performance...
Click to expand...
Click to collapse
SetCPU only sets clock speeds and governors already in the kernel. If you just install SetCPU and adjust no settings your battery life will not change. Thus, "does SetCPU help battery life?" is utterly and completely meaningless.
Discussion of different governors and clock speeds has occurred (and is still occurring) ad nauseum and is really more suited for the General forum.

Thread moved as it does not pertain to N1 development.

I see very little gains from setcpu but I use it because I purchased it from the market and why not use it if you bought it right?
This method does not apply to drug addiction LOL
-Charlie

bri3d said:
SetCPU only sets clock speeds and governors already in the kernel. If you just install SetCPU and adjust no settings your battery life will not change. Thus, "does SetCPU help battery life?" is utterly and completely meaningless.
Discussion of different governors and clock speeds has occurred (and is still occurring) ad nauseum and is really more suited for the General forum.
Click to expand...
Click to collapse
lol Why would you download an application, not use it, and expect results?
If you throttle your CPU down you WILL get better battery life. My phone is set to never go over 600mhz and I get bettter life with it than if I turn off setcpu altogether.

charnsingh_online said:
1. Not in right section
2. SetCPU not intended for battery life
3. It only adjusts CPU clockspeed
4. This thread is mostly meaningless
Click to expand...
Click to collapse
You have a lot of knowledge, this is obvious but you're unnecessarily harsh (mean).
It's boring but's it's a legitimate question because people still make inaccurate conclusions about CPU and battery life. Those of us with some knowledge can really help those that are trying to understand.
#2 above is correct. But the question remains, does a forced lower clock speed ceiling have an effect on battery life? It could do, of course it could, but without a baseline and a control environment it's impossible to prove either way. I suspect the OP is simply looking for subjective opinions.
And on this basis I offer:
The CPU only has a material effect on battery drain when it's being utilised.
When the Nexus CPU is not required to work it idles using the lowest power possible
The radio (network) interface is the second most demanding element of on your battery over time (next to the display). Although the CPU peak demand is higher than the radio.
SetCPU does not impact radio battery use.
SetCPU can not have a positive effect on battery usage if it's using more power to run it's clock cycles.
SetCPU can force the processor to use less power (wind down speed).
Slowing the processor means some tasks will take longer to perform.
If those tasks require a high-drain elements (display, radio, WiFi or BT for example) then it's counter-productive (battery wise) to slow them down.
However, because CPU power consumption does not have a liner relationship to clock speed, then some tasks that don't use high-drain elements will consume less power to complete.
So, whilst it's unlikely that your battery life will benefit from the use of SetCPU alone there is a chance that it will.
SetCPU is a fantastic app designed for overclocking, the profiles are niche facilities that may offer battery benefit to a narrow range of users.

Hey djmcnz thanks for the indept look at this app but more importantly thanks for showing respect to those of us who are just learning. We all have to learn information at some point and there are people that forget that at one point some one had to tell them.

Thank you for the clarification on that! Djmcnz-that was exactly what I was looking for in terms of an answer. I really appreciate you taking the time out to explain everything for me and anyone else that may have been curious.

charnsingh_online said:
1. Not in right section
2. SetCPU not intended for battery life
3. It only adjusts CPU clockspeed
4. This thread is mostly meaningless
Click to expand...
Click to collapse
Don't know why you're so pissed off by a thread...
1. Not a very big issue. We have mods here to take care of this.
2. I don't know if SetCPU affects battery life or not but similar thing on a PSP device does increase the battery life. I have tried it on my PSP and setting the clock speed to the lowest acceptable level (depending upon what you're doing) does help maximizing the battery life.
3. You're absolutely right here.
4. Don't know what to say man.. but being a little humble doesn't hurt....

I never meant to be rude. I always get pissed off when people post in wrong sections Seriously. If people post in right section it just frees up moderator time. And about CPU nexus CPU has same voltage for many frequencies like 998,960 have same voltage. Going so down doesn't mostly benefit. So setcpu is only good for overclocking IMO. Display uses most of the power along with radio n CPU is one of those in middle of usage maybe 3rd or 4th. So underclocking will give a big battery boost is just a placebo. Atmost 10 minutes more is what underclocking can provide. N its not worth sacrificing the performance. Go for something underpowered if u want to underclock IMO. So setcpu serves more purpose of power than battery

I use it for the cool widget and standby/idle profile. B-)

you know what?youre allright.i follow your threads and you explain things well for someone like me learning all this ****.i got no time for keyboard commandos.thanks for the explanation.
djmcnz said:
You have a lot of knowledge, this is obvious but you're unnecessarily harsh (mean).
It's boring but's it's a legitimate question because people still make inaccurate conclusions about CPU and battery life. Those of us with some knowledge can really help those that are trying to understand.
#2 above is correct. But the question remains, does a forced lower clock speed ceiling have an effect on battery life? It could do, of course it could, but without a baseline and a control environment it's impossible to prove either way. I suspect the OP is simply looking for subjective opinions.
And on this basis I offer:
The CPU only has a material effect on battery drain when it's being utilised.
When the Nexus CPU is not required to work it idles using the lowest power possible
The radio (network) interface is the second most demanding element of on your battery over time (next to the display). Although the CPU peak demand is higher than the radio.
SetCPU does not impact radio battery use.
SetCPU can not have a positive effect on battery usage if it's using more power to run it's clock cycles.
SetCPU can force the processor to use less power (wind down speed).
Slowing the processor means some tasks will take longer to perform.
If those tasks require a high-drain elements (display, radio, WiFi or BT for example) then it's counter-productive (battery wise) to slow them down.
However, because CPU power consumption does not have a liner relationship to clock speed, then some tasks that don't use high-drain elements will consume less power to complete.
So, whilst it's unlikely that your battery life will benefit from the use of SetCPU alone there is a chance that it will.
SetCPU is a fantastic app designed for overclocking, the profiles are niche facilities that may offer battery benefit to a narrow range of users.
Click to expand...
Click to collapse

djmcnz said:
You have a lot of knowledge, this is obvious but you're unnecessarily harsh (mean).
It's boring but's it's a legitimate question because people still make inaccurate conclusions about CPU and battery life. Those of us with some knowledge can really help those that are trying to understand.
#2 above is correct. But the question remains, does a forced lower clock speed ceiling have an effect on battery life? It could do, of course it could, but without a baseline and a control environment it's impossible to prove either way. I suspect the OP is simply looking for subjective opinions.
And on this basis I offer:
The CPU only has a material effect on battery drain when it's being utilised.
When the Nexus CPU is not required to work it idles using the lowest power possible
The radio (network) interface is the second most demanding element of on your battery over time (next to the display). Although the CPU peak demand is higher than the radio.
SetCPU does not impact radio battery use.
SetCPU can not have a positive effect on battery usage if it's using more power to run it's clock cycles.
SetCPU can force the processor to use less power (wind down speed).
Slowing the processor means some tasks will take longer to perform.
If those tasks require a high-drain elements (display, radio, WiFi or BT for example) then it's counter-productive (battery wise) to slow them down.
However, because CPU power consumption does not have a liner relationship to clock speed, then some tasks that don't use high-drain elements will consume less power to complete.
So, whilst it's unlikely that your battery life will benefit from the use of SetCPU alone there is a chance that it will.
SetCPU is a fantastic app designed for overclocking, the profiles are niche facilities that may offer battery benefit to a narrow range of users.
Click to expand...
Click to collapse
HUH English Please
Kidding

mikey1022 said:
huh english please :d
kidding
Click to expand...
Click to collapse
34567890

Personaly done many tests and the result was:
Test config: WiFi tethering all the way, screen 100% Playing video all the time 2G only
4:10 @ 245Mhz hard
3:30 @ 998Mhz hard
No use actually - using N1 on 245Mhz is impossible - too sluggish.
SetCpu is ussefull:
1) If u have OC kernel to set OC mode for games like Asphalt
2)For letting android vary frequence ondemand instead of 998 all the time
3)For downclocking while in sleep mode (why use full power when u dont use it?)
4)For using Failsafe profile, to prevent battery and hardware damage.
That's all.
No use trying saving battery setting profiles like 100% - 998, 50% - 576, 20% - 499. This is useless.
On UV kernels the same thing +\-30 minutes battery life. And UV kernels themselfs dont give segnificant battery life increase, only lags and unstability ti system.
Dont believe me try yourself - Create yourself some actions fo testing and repeat them 2 time (Min cpu and Max cpu) on any kernel. Results will be very close.

SeriousX said:
3)For downclocking while in sleep mode (why use full power when u dont use it?)
Click to expand...
Click to collapse
The CPU steps down to it's minimum speed by itself. It never uses more juice than it needs to.

As far as i know, it is always at maximum, but maybe im wrong and you are right - then theres even less sence in this app.

Interactive Vs Conservative Governor? CDMA Battery Life Tips

What is this nonsense people are saying about 4 or 5 hours with screen on and their phone is still at 20%? GTFO.... Usually I would say about 3 hours of screen on and i'm dead. I can get like 18 hrs or so lightly, and by lightly, I mean only using it for a few text and check email, maybe some fb just to check inbox and such, lightly, using the phone (with my reception).
I know the Fascinate is better hardware, and I switched for the GPU among other reasons (2 of em for free...=P) but, on my nexus, I still find that the interactive governor ramped up to the max freq. (1113Mhz) less. Of course, I am using the 1150 nonvoodoo from geeknik, but I doubt I will make it 4 or 5 hours of screen on time.w
How can you use the phone, with the screen on, and not do anything that uses the battery. I mean, without cyanogen, it was cool that I can make it through my day, easy, close to out of box (getting to superclean dj05 is about 100 less flashes that I made it through with the n1/sense/cyan nightlys/test roms/etc.).
But now I want more, the price I have to pay I guess for the .3 inches of gained screen is not using the phone heavily in order to save battery!? That sucks. I used to hammer my iPhone and I rarely made it through the day, but I hammered it with atleast 4 or 5 hrs of screen on time sometimes, and it would make it atleast 8 hours... that thing would idle wayyyy better on GSM Edge than CDMA I guess, as with my T-Mobile N1, it idled wayy better, than this CDMA phone. Is there a way to put it on 1x instead of having it always on 3g? There isnt a setting to uncheck, and you cant get in *#*#4636#*#* on CDMA. I tried that immediately after unboxing to get off 3g when I wasnt using net apps, and usually that gave better signal on GSM, saving battery.
Check out my interactive battery test on my N1 that I did, the interactive setting eventually fell out of favor because it ramps up to the max... instead of ramping up accordingly like OnDemand, and not too slowly like Conservative. Again, why does Fascinate use conservative?
http://forum.xda-developers.com/showthread.php?p=7370179 thats my Interactive Governor Battery Test on my N1 I did in the summer time...
I just wanted to start this thread so we can get a consensus on what works best, and for charging this battery. I used to charge my N1 an extra 1.5 hrs with it off after android says it was at 100. That way it idled on 100 instead of immediate drain. An extra 3 or so hours of battery life if you use it right.
CPU governors control exactly how the CPU scales between your "max" and "min" set frequencies. Most kernels have "ondemand" and "performance." The availability
********I want to be able to choose between ondemand and powersave when my battery gets low. On this phone, as I did with the N1.
ondemand - Available in most kernels, and the default governor in most kernels. When the CPU load reaches a certain point (see "up threshold" in Advanced Settings), ondemand will rapidly scale the CPU up to meet demand, then gradually scale the CPU down when it isn't needed.
conservative - Available in some kernels. It is similar to the ondemand governor, but will scale the CPU up more gradually to better fit demand. Conservative provides a less responsive experience than ondemand, but can save battery.
performance - Available in most kernels. It will keep the CPU running at the "max" set value at all times. This is a bit more efficient than simply setting "max" and "min" to the same value and using ondemand because the system will not waste resources scanning for the CPU load. This governor is recommended for stable benchmarking.
powersave - Available in some kernels. It will keep the CPU running at the "min" set value at all times.
userspace- A method for controlling the CPU speed that isn't currently used by SetCPU. For best results, do not use the userspace governor.

akaine2001 said:
What is this nonsense people are saying about 4 or 5 hours with screen on and their phone is still at 20%? GTFO.... Usually I would say about 3 hours of screen on and i'm dead. I can get like 18 hrs or so lightly, and by lightly, I mean only using it for a few text and check email, maybe some fb just to check inbox and such, lightly, using the phone (with my reception).
I know the Fascinate is better hardware, and I switched for the GPU among other reasons (2 of em for free...=P) but, on my nexus, I still find that the interactive governor ramped up to the max freq. (1113Mhz) less. Of course, I am using the 1150 nonvoodoo from geeknik, but I doubt I will make it 4 or 5 hours of screen on time.w
How can you use the phone, with the screen on, and not do anything that uses the battery. I mean, without cyanogen, it was cool that I can make it through my day, easy, close to out of box (getting to superclean dj05 is about 100 less flashes that I made it through with the n1/sense/cyan nightlys/test roms/etc.).
But now I want more, the price I have to pay I guess for the .3 inches of gained screen is not using the phone heavily in order to save battery!? That sucks. I used to hammer my iPhone and I rarely made it through the day, but I hammered it with atleast 4 or 5 hrs of screen on time sometimes, and it would make it atleast 8 hours... that thing would idle wayyyy better on GSM Edge than CDMA I guess, as with my T-Mobile N1, it idled wayy better, than this CDMA phone. Is there a way to put it on 1x instead of having it always on 3g? There isnt a setting to uncheck, and you cant get in *#*#4636#*#* on CDMA. I tried that immediately after unboxing to get off 3g when I wasnt using net apps, and usually that gave better signal on GSM, saving battery.
Check out my interactive battery test on my N1 that I did, the interactive setting eventually fell out of favor because it ramps up to the max... instead of ramping up accordingly like OnDemand, and not too slowly like Conservative. Again, why does Fascinate use conservative?
http://forum.xda-developers.com/showthread.php?p=7370179 thats my Interactive Governor Battery Test on my N1 I did in the summer time...
I just wanted to start this thread so we can get a consensus on what works best, and for charging this battery. I used to charge my N1 an extra 1.5 hrs with it off after android says it was at 100. That way it idled on 100 instead of immediate drain. An extra 3 or so hours of battery life if you use it right.
CPU governors control exactly how the CPU scales between your "max" and "min" set frequencies. Most kernels have "ondemand" and "performance." The availability
********I want to be able to choose between ondemand and powersave when my battery gets low. On this phone, as I did with the N1.
ondemand - Available in most kernels, and the default governor in most kernels. When the CPU load reaches a certain point (see "up threshold" in Advanced Settings), ondemand will rapidly scale the CPU up to meet demand, then gradually scale the CPU down when it isn't needed.
conservative - Available in some kernels. It is similar to the ondemand governor, but will scale the CPU up more gradually to better fit demand. Conservative provides a less responsive experience than ondemand, but can save battery.
performance - Available in most kernels. It will keep the CPU running at the "max" set value at all times. This is a bit more efficient than simply setting "max" and "min" to the same value and using ondemand because the system will not waste resources scanning for the CPU load. This governor is recommended for stable benchmarking.
powersave - Available in some kernels. It will keep the CPU running at the "min" set value at all times.
userspace- A method for controlling the CPU speed that isn't currently used by SetCPU. For best results, do not use the userspace governor.
Click to expand...
Click to collapse
Thank Samsung for breaking ondemand on every sgs phone.
Sent from my SCH-I500 using XDA App

Well what else can you contribute to this thread? Thanks for letting me know that the ondemand is just broken on galaxy s phones. So basically its interactive ... or laggy UI experience. And if you've never used a ondemand kernel, you wouldn't notice the difference but i certainly do. It just takes too long sometimes for it to wake and other things. I have my screen off at 400 mhz but still that is higher than the 256 i was using on the nexus one and it used to wake immediately.
I was reading today and I found that ondemand is pretty much the way to go so i wonder if we could bounty up enough would somebody unbreak it...

akaine2001 said:
Well what else can you contribute to this thread? Thanks for letting me know that the ondemand is just broken on galaxy s phones. So basically its interactive ... or laggy UI experience. And if you've never used a ondemand kernel, you wouldn't notice the difference but i certainly do. It just takes too long sometimes for it to wake and other things. I have my screen off at 400 mhz but still that is higher than the 256 i was using on the nexus one and it used to wake immediately.
I was reading today and I found that ondemand is pretty much the way to go so i wonder if we could bounty up enough would somebody unbreak it...
Click to expand...
Click to collapse
You are doing something wrong. Conservative is not choppy on my device and the CPU will always ramp up faster than a human being can judge the response time.
Sent from my SCH-I500 using XDA App

My phone makes it the entire day with heavy use, this means about 20 - 10 min phone calls one or two lasting 30 min, texting my wife all day at work, checking emails, and angry birds for at least 1 hour a day i love that game but I suck at it lol. Something that I found is that the phone will last almost an hour of being on the phone after it hits 0%. In my pocket it lasted 4 hours at 0% the day before yesterday. I thought maybe this is on purpose so you have more then enough time to make it to a charger. When I first downloaded angry birds I played it for three hours straight with the screen at full brightness (i always keep it at full brightness, looks prettier that way) I know it was three hourse because it was while i was waiting at the hospital I got there a little before 7 and wasnt called until 10. Overall I am very pleased with the battery life of this phone not so much with other aspects but battery life and lag never came into my mind as a complaint for this phone, except with all the stock touchwiz stuff.

As adrynalyne said, CPU's scaling changes faster than human's perception. It's your phone or setting that's having an issue.

4 hours at 0%?
The little graphic samsung gives you in the stock battery is misleading.
In my brief experience with it, I got the following impression.
full battery graphic: you have between 100% and 75% left.
<full battery: 75%-50%
Half battery: 50%-25%
low battery: 25%-15%
empty: 15%-0%
This may not be quite right, but you get the idea. It has been a while, but stock battery is pretty misleading. Samsung reports [more than] half empty [always] as being half full!
Want a more trailer indicator? You can get an accurate battery mod (via a theme for instance) or you can download an app to check current battery % left (i use osmanager - do not leave this app running in the background! )
Assuming your phone lasts 27 hours or so unplugged with no use at all, I would say 4 hours at "zero" battery makes sense.
For my phone, the display uses an average of 3.5x as much power as the rest of its functionality (total of 1/4.5x lifespan in active use vs. pocket)
Swyped w/ XDA App. When in doubt, mumble.

I meant "reliable" not trailer.

I get about 5 hours of screen time with little voice calls on wifi.

I don't know if I am just one of the lucky ones but my phone gets between 30 and 36 hours on a single charge, having even made it to 44 hours on a very rare occasion and that's without setcpu profiles even set.

Wtf... my phone is brand spanking new and I get about 4ish hours of screen time on a full charge, with the lowest brightness + screen filter app set at 50.6% reduced light. I get like 3 hours without screen filter on.... wtf. This is running on conservative or interactive the whole time..... wtf!!! With wifi on and 0 extra screens or Widgets using launcher pro without animations... wtf!!!
Sent from my SCH-I500 using XDA App

+1... stock battery indicator is not accurate. Get the accurate battery mod.
soba49 said:
4 hours at 0%?
The little graphic samsung gives you in the stock battery is misleading.
In my brief experience with it, I got the following impression.
full battery graphic: you have between 100% and 75% left.
<full battery: 75%-50%
Half battery: 50%-25%
low battery: 25%-15%
empty: 15%-0%
This may not be quite right, but you get the idea. It has been a while, but stock battery is pretty misleading. Samsung reports [more than] half empty [always] as being half full!
Want a more trailer indicator? You can get an accurate battery mod (via a theme for instance) or you can download an app to check current battery % left (i use osmanager - do not leave this app running in the background! )
Assuming your phone lasts 27 hours or so unplugged with no use at all, I would say 4 hours at "zero" battery makes sense.
For my phone, the display uses an average of 3.5x as much power as the rest of its functionality (total of 1/4.5x lifespan in active use vs. pocket)
Swyped w/ XDA App. When in doubt, mumble.
Click to expand...
Click to collapse

Terror_1 said:
I don't know if I am just one of the lucky ones but my phone gets between 30 and 36 hours on a single charge...
Click to expand...
Click to collapse
That's because you don't use your phone.
Go play NFS for 3 hours and get back to us.
MoShiBa said:
...screen filter app set at 50.6% reduced light. I get like 3 hours without screen filter on...conservative or interactive the whole time...
Click to expand...
Click to collapse
What's the screen filter app? Conservative and interactive? That's SetCPU?
I wouldn't worry about these guys coming in here saying they're getting 2 days of use either. They're not using the phone anywhere near as much as you. I've had 3 of these things and know 2 guys with them. They all got the same battery life. You don't see anyone posting any screenshots, do you?

Me and my gfs fascinate gets about same battery life in our apt and hers is still DI01 and i'm on DJ05... she has jts 11/16 kernel and i have the 12/21 voodoo5 and we get about the same battery life... dependent on how much we use the phone. .... so just use your phone, and charge it as necessary... its better for the type of battery we use anyways in our phones... **************************************************************************************closed.**************************************************************************************

Quest for the best battery life.

Day 1:
Flashed Simple and Clean v1.3
2.6.35.7 speedmod test3 k2 kernel
Juice Defender Ultimate in Agressive mode.
Batterylife: 11 hours. Lost most of the life when the phone and I were both asleep during the night. It went down from 100 to 38%...
PS: If anyone wants to give me their set up so I don't have to spend so long on this quest, that would be appreciated...

There are 2 more threads with the same topic, with much more info. Also, we know nothing about how you use your phone, except that you have huge wakelocks. Not really helpful tbh.

care to point out those threads for me?

convolution said:
care to point out those threads for me?
Click to expand...
Click to collapse
you could actually use the search function
PS - Ditch Juice Defender it uses up as much battery as it saves, trust me this is fact.

I did. I tried some of the solutions posted in some threads like using speedmod + clean n simple, and also lightning v6.1 and ninphetamine kernel; doesn't work.

I used to have the Galaxy S Vibrant before I got the S2. I swore by Juice Defender. I would get on average 45-60% more battery depending on usage (phone was rooted with OCLF installed). My S2 gets an additional 2-3% more life while running juice defender. Takes more than that to run it. My opinion, remove the app.
I am running sensation 1.9 rom and hardcore speedmod kernel. I work oh average 11 hours a day. Phone isn't used much during that time. Wifi is always on and by the end of my shift, it's at 94% or so.
When I get home, my phone is put through some heavy use. Facebook, youtube, texting galore and internet browsing. I always have 25-30% battery left at the bare minimum written I go to bed at 6-8 hours later.
In my personal opinion, this rom and kernel combination give me the best power (4700 on quadrant), best options (configuration got nearly anything) and best battery life (phone lasts all day with ease). I would recommend this to anyone in a heartbeat.
-Chris
Sent from my GT-I9100 using XDA App

I'd recommend the Hyperdroid rom. A lot of users (including myself) have hit 5 hours screen on time (most I've seen is 7 hours). Phone can easily last a whole day, just need to check for wakelocks using BBS. 60% overnight is ridiculous lol, you should really be losing 1% every 4-5 at least unless you have loads of people ringing you all night
My setup
Rom: Hyperdroid 2.9.0
Kernal: TWD2.5
UV with voltage control
200mhz - 1200mhz
Sio I/O - Lulzactive governer
Max Screen On Time - 5 Hours 28 Mins
Facebook/Whatsapp Syncing

Read the guide i posted yesterday, its a bit long, but will definately save you battery life.
http://forum.xda-developers.com/showthread.php?t=1351663
Also my setup is in my sig - very fast, very slick and above all great battery life (range between 20hrs and 28hrs moderate use)

I read the long thread. It has some points in there I didn't know about.
Will try HyperDroid Rom.
Tried Sensation. Battery life failed for me with that ROM. Will try it againwith speedmod kernel if HyperDroid doesn't work...
btw, what governor is the best for Hyperdroid?

i use
check/leo rom v 3.1.1
siyah kernel 2.2 beta6
ice cream sandwich theme
the kernel is set at smartass v2 governor
1.4ghz - 1300mv
1.2ghz - 1275mv
1ghz - 1150mv
800mhz - 1050mv
500mhz - 950mv
200mhz -900mv
100mhz - 875mv
my sgs2 doesnt like undervolting so them settings should be safe to use on most sgs2 handsets
i then have the following profiles
screen off 100mhz -- 200mhz
charging 100mhz -- 500mhz
in call 100mhz -- 500mhz
battery at 60% set cpu to 100mhz -- 1ghz
battery at 30% set cpu to 100mhz -- 800mhz
battery at 15% set cpu tp 100mhz -- 500mhz
getting excellent battery life with my sgs2
ive also frozen any apps i dont use via titanium and used a start up manager to stop certain programs starting at boot
i used to use juice defender but on the sgs2 it doesnt seem to wrk as well at all
i was getting wakelocks from facebook chat draining my battery so i have installed an app to auto close that when the screen goes off and that has saved me more battery and kept wakelocks down
as other users have said its all about how you use your phone , the settings above might be useless if you have lots of background tasks going on as a screen off profile off 100mhz -- 200mhz may not have enough power to do your background tasks however when my screen is off i want my phone to go to deep sleep and not consume power etc so a very low screen off profile suits my needs as does a low charging profile as i dont use my phone on charge and 500mhz max power suffices my needs for when the phone is charging
same goes for setting a battery % profile i know when my battery is at 15% i wont be playing high end 3d games so it makes sense for me to try and save battery and limit the cpu to 500mhz at that battery percentage but other users may want full power all the way till their battery dies , it all depends on what you want and do with your device

Day whatever:
Used Hyperdroid ROM: Battery Life is AMAZING!
Using their 2.5 TW kernel as well...
The first thing I did was restore all my apps with Titanium Backup, but then I got crappy battery life, so I reflashed the ROM but this time, I didn't restore any apps.
I got amazing battery life!
So it was an APP's fault!

yeah sometimes apps are rogue. Hyperdroid has an awesome kernal though, someones just hit over 8 hours screen on time with stock battery which is amazing. betterbatterystats would show you apps that are causing wakelock problems. I do use some app called gemini just so I can stop apps loading from boot (haven't been bothered to search for autostart apps). Fresh wipe is good sometimes though, fresh and clean is the way to go unless your upgrading from the same line of roms

DramatikBeats said:
yeah sometimes apps are rogue. Hyperdroid has an awesome kernal though, someones just hit over 8 hours screen on time with stock battery which is amazing. betterbatterystats would show you apps that are causing wakelock problems. I do use some app called gemini just so I can stop apps loading from boot (haven't been bothered to search for autostart apps). Fresh wipe is good sometimes though, fresh and clean is the way to go unless your upgrading from the same line of roms
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DB i manage minimum screen on time with rom/kernel combo over 5hrs.....and it saved me money from getting a extended battery. why you think i aint been back on foxy yet...and even though i love raffaeles work (foxy and androidmeda is the top two) for me its all about battery life and that one has done it for me nxt stop though is ICS

will underclock provide realy more battery and reduce heat ?

hy there,
im on latest sokp rom on my g2 (d802)
i want to get more juice from my battery, so I setup my core setings at 1036 mhz max and minimum 300 mhz.
wil this provide me a lot off battery in real life and will it also reduce heat ? even if i watch hd movie or play graphical games

In theory yes it should but not as much as you think cause it will be offset because it will have to keep a higher frequency for a higher period of time. Temperature should be reduced a lot but keep in mind games will lag if they need the extra power

drivenby said:
In theory yes it should but not as much as you think cause it will be offset because it will have to keep a higher frequency for a higher period of time. Temperature should be reduced a lot but keep in mind games will lag if they need the extra power
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Click to collapse
hmm, well after i underclocked i played asphalt 8 for like 20 mins and game performance did not changed significantly. and i feel that the phone is now cooler then before when multitasking stuff.
is there also another way that can realy increase battery life besides underclocking.

abati said:
hmm, well after i underclocked i played asphalt 8 for like 20 mins and game performance did not changed significantly. and i feel that the phone is now cooler then before when multitasking stuff.
is there also another way that can realy increase battery life besides underclocking.
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Click to collapse
you also can try custom governors

Hey there, you may be suffering a placebo effect, it can give you a little extra juice, but in my opinion you get most of your battery with these 4:
1. Reduce timeout to 15sec.
2. Adjust screen brightness to be as low as possible (lux helps with this)
3. Eliminate vibrations of any kind (haptic feedback, notications that make your phone vibrate ex. whatsapp) and so on...
4. Data (Use Wifi if possible, 2g when you are not using your phone and airplane mode in some cases extend your battery for a lot too)
Don't expect to get more than 30 min of extra use changing your kernel configurations. ALTHOUGH if you are a heavy user (let us say, in this case, a heavy gamer) there are some kernel configurations you should check.
Also remember, if a task takes you 30min but only consumes 1 % per 30 min compared to doing the exact same task in 30seconds consuming the same 1% which one is worth it?
Phones hardware is way above the software we have available at this time, underclocking and undervolting is an option and you won't feel the difference but, as I've stated before, those are not the main issues of the battery drain.
I hope I've helped you out!

Which rom has a good battery life?

Hey i tried many diffrent rom bui i can only get 2.5h SOT. Which kernel do you use and which rom to get the maximum battery life without lag?

Battery<----------------------------------->Performance
They are at opposite ends. If you want maximum battery life then there no way to avoid lag.
You can completely turn off 2 or 3 cores, leaving you with a single or dual core phone;
You can also underclock and undervolt the remaining cores, reducing power consumption even more.
This is very battery friendly (in theory), but, as I said, it will give you big lags.
I added a rom video review to the help thread. You might want to check it out.

obol2 said:
Hey i tried many diffrent rom bui i can only get 2.5h SOT. Which kernel do you use and which rom to get the maximum battery life without lag?
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Sounds like you really need a new battery
GDReaper said:
Battery<----------------------------------->Performance
They are at opposite ends. If you want maximum battery life then there no way to avoid lag.
You can completely turn off 2 or 3 cores, leaving you with a single or dual core phone;
You can also underclock and undervolt the remaining cores, reducing power consumption even more.
This is very battery friendly (in theory), but, as I said, it will give you big lags.
I added a rom video review to the help thread. You might want to check it out.
Click to expand...
Click to collapse
Don't mean to troll, but can't help it. Turn a quad core cpu into a dual core? Really?!
Erm... ok.

thundastruck said:
Don't mean to troll, but can't help it. Turn a quad core cpu into a dual core? Really?!
Erm... ok.
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Click to collapse
Do you have any better ideas on how to increase battery life?
Cores need power to run. Turning them off is a completely logical option.
You really don't need all the cores for most tasks. You can browse Facebook, or whatever, just fine with only two cores.
I am currently running in dual-core mode with max cpu frequency at 1.2 GHz and it still is smooth.

GDReaper said:
Do you have any better ideas on how to increase battery life?
Cores need power to run. Turning them off is a completely logical option.
You really don't need all the cores for most tasks. You can browse Facebook, or whatever, just fine with only two cores.
I am currently running in dual-core mode with max cpu frequency at 1.2 GHz and it still is smooth.
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I aldeady underclockt it to 1.2 ghz and undervolting it -625000 uV. Shut off to cores and use intellimm. I also under clock gpu to 320 mhz and under volt it 1 step down. I use zen with 1024 kb. Turn off android logger and zram. Use amplify, power nap, greenify and Max 700 mhz screen off. What I can do more?

obol2 said:
I aldeady underclockt it to 1.2 ghz and undervolting it -625000 uV. Shut off to cores and use intellimm. I also under clock gpu to 320 mhz and under volt it 1 step down. I use zen with 1024 kb. Turn off android logger and zram. Use amplify, power nap, greenify and Max 700 mhz screen off. What I can do more?
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Click to collapse
Nothing.
Test your battery. Or better yet, start thinking of getting a replacement or a new phone. With a 2 hour charge something seriously is wrong with your device.
My 3 year old S4-i9500 still comfortably gets through the day. Bought a brand new original battery 6 months ago. Smooth sailing. No under-volting, shutting off cores, under-clocking or any crap like that. Phone is custom rom'med and correctly so if I may add.

obol2 said:
I aldeady underclockt it to 1.2 ghz and undervolting it -625000 uV. Shut off to cores and use intellimm. I also under clock gpu to 320 mhz and under volt it 1 step down. I use zen with 1024 kb. Turn off android logger and zram. Use amplify, power nap, greenify and Max 700 mhz screen off. What I can do more?
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Click to collapse
lower values for read ahead cache are more battery friendly.
Also, bfq is considered more battery friendly too.

thundastruck said:
Nothing.
Test your battery. Or better yet, start thinking of getting a replacement or a new phone. With a 2 hour charge something seriously is wrong with your device.
My 3 year old S4-i9500 still comfortably gets through the day. Bought a brand new original battery 6 months ago. Smooth sailing. No under-volting, shutting off cores, under-clocking or any crap like that. Phone is custom rom'med and correctly so if I may add.
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Click to collapse
In two month I will get a new phone. I want to buy the lg v10 but don't know if it is worth or lg g4 / moto x style.

obol2 said:
In two month I will get a new phone. I want to buy the lg v10 but don't know if it is worth or lg g4 / moto x style.
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Never heard of these models except for lg g4, which was crap imo.

thundastruck said:
With a 2 hour charge something seriously is wrong with your device.
My 3 year old S4-i9500 still comfortably gets through the day
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Click to collapse
You are aware that he said 2.5h SOT, "screen on time" ?
That means that after using it for an entire day or two, the combined time of the screen being on is 2.5 hours, and in my opinion that is not really bad.
The screen is always the culprit when it comes to power consumption, and in a phone with a battery that doesnt exeed 2000mah its just natural
that after about 2-3 hours of the screen being on the little battery is empty, and no ammount of undervolting will extend that significantly.
The only thing he can consider to increase SOT is a bigger battery, if he doesnt mind the bigger bulge at the back.

Backe888 said:
You are aware that he said 2.5h SOT, "screen on time" ?
That means that after using it for an entire day or two, the combined time of the screen being on is 2.5 hours, and in my opinion that is not really bad.
The screen is always the culprit when it comes to power consumption, and in a phone with a battery that doesnt exeed 2000mah its just natural
that after about 2-3 hours of the screen being on the little battery is empty, and no ammount of undervolting will extend that significantly.
The only thing he can consider to increase SOT is a bigger battery, if he doesnt mind the bigger bulge at the back.
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Click to collapse
Had no idea - never really cared what SOT stands for anyway! But thanks for clearing that up. Always had satisfactory battery life on my S4. The few times I didn't was when a rom on my phone went bad & subsequently had to flash another.
So if what you say is true regarding a day or 2 battery life, then what is this chump complaining about? Turning water into wine? :silly:

So @GDReaper idea is right!I currently am on crDroid and when I switch off 2 or 3 cores the phone is as fast as it was and the battery lasts a little bit longer..With normal charging it goes to full for about 1 hour and half and without using it the batttery lasts 1-2 days,using it lasts about 3 hours or 4.I flashed a new kernel and turned on fast charging on Kernel Adiutor,now the phone charges full for about 45 minutes and lasts same! I'm very happy with my battery bcs I haven't changed it since I got the phone!