Database Users

setCPU dangers

I get pretty crappy battery life on my poor little N1. Cell standby takes up 49% and phone idle 49% when I go into the battery information. I am considering setCPU but I'm scared that if it's changing the clock speed every time I turn the thing off isn't that bad? I mean having the clock speed adjusted so many times, couldn't that hurt the device's life span?

by default on stock it already scales the CPU to conserve battery

My battery life has increased since I've used this program its awesome

Cell standby and phone idle at 49% each isn't a problem if that's all that's been using it. It doesn't mean each one will take up 49% of your entire battery. If you just unplugged it and let it sit without using the screen or anything, then the only thing using your battery is the standby and idle. So after 2 hours or so of that, you might be down to 90% battery, and both cell standby and phone idle are using 49% of that 10% each. In other words, it used up 4.9% of the total battery each.
As for changing the speed all the time, it will not hurt the CPU, as Android already does that for you all the time. When sleeping it under clocks to the lowest, and when you need to use an app, it clocks it back up to full power.

Clarkster said:
Cell standby and phone idle at 49% each isn't a problem if that's all that's been using it. It doesn't mean each one will take up 49% of your entire battery. If you just unplugged it and let it sit without using the screen or anything, then the only thing using your battery is the standby and idle. So after 2 hours or so of that, you might be down to 90% battery, and both cell standby and phone idle are using 49% of that 10% each. In other words, it used up 4.9% of the total battery each.
As for changing the speed all the time, it will not hurt the CPU, as Android already does that for you all the time. When sleeping it under clocks to the lowest, and when you need to use an app, it clocks it back up to full power.
Click to expand...
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I've been using it for 4 hours and they're both 49% and the screen is only 2%, is my phone defective?

Have you been using the screen during those 4 hours? Like using it to browse or run apps or anything? Or has it just been sitting there for most of the time?

Clarkster said:
Have you been using the screen during those 4 hours? Like using it to browse or run apps or anything? Or has it just been sitting there for most of the time?
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Sitting there mostly. Here's a screenshot I took yesterday:
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Absolutely no use whatsoever and it's lost 12%?

That seems perfectly normal. Don't worry about it. It does have to use power to idle there, it is still a running computer, and it also needs to stay connected to the closest cell tower in case you get a call.
When it is sitting all by itself that is all it has to do. Your screenshot shows that in 10 hours it only took 12%. That is very good.
If you used the screen for 5 of those hours, your battery could be down to much less than half, and the screen would be about 90% on that graph, while the idle and standby would be less than 5% each.

Clarkster said:
That seems perfectly normal. Don't worry about it. It does have to use power to idle there, it is still a running computer, and it also needs to stay connected to the closest cell tower in case you get a call.
When it is sitting all by itself that is all it has to do. Your screenshot shows that in 10 hours it only took 12%. That is very good.
If you used the screen for 5 of those hours, your battery could be down to much less than half, and the screen would be about 90% on that graph, while the idle and standby would be less than 5% each.
Click to expand...
Click to collapse
I only get 2-3 hours if I'm using it for internet I'm not sure if I need setCPU or of it does it for me
I really wanted a desire rom but everyone goes on about how bad the battery life is on them. It doesn't make sense because the desire has a 1300 battery when we have a 1400.

Ok, that is a problem. When it is idling your phone seems normal, but I am able to get more than 2-3 hours when browsing the web.
SetCPU won't help you that much, well it can help, but it is best to find out why you are so low in the first place. Fix that first to get it to a normal length first, then you can look at extending the normal time to longer with SetCPU and other things.
As for right now, what brightness do you have the screen on, what are you normally browsing on? I usually use it at a pretty low setting because I am indoors, and browse pretty simple websites.
If you use full brightness and watch youtube videos you probably would drain the battery insanely fast.
What are you normally doing when it drains so fast?

30% brightness and just casual browsing, some forums mostly.

Since your battery isn't draining by itself, I don't think it is a rogue program taking the battery.
If you are using 3G with a really bad signal it could do that, as it has to boost the power to reach the tower.
Otherwise I am at the end of my suggestions, you could try reading through a few of the large battery threads until something sounds like it could be your issues. I doubt you're the first person to have whatever issues you have.

I live in rural Canada. I think it's rather mutual that I get crappy service
I would love an extended battery, but unfortunately I know nobody who's actually used one who could tell me how good they are, or where I could even obtain one where I am in Canada.
It's mostly the desire rom I really want though, but the blasted battery is supposedly so bad for it!

Macmee said:
I mean having the clock speed adjusted so many times, couldn't that hurt the device's life span?
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Click to collapse
I don't think so because I've been adjusting clock/bus speed on my psp for over two years now and the battery life seems perfect and the processor too...

Macmee said:
I live in rural Canada. I think it's rather mutual that I get crappy service
I would love an extended battery, but unfortunately I know nobody who's actually used one who could tell me how good they are, or where I could even obtain one where I am in Canada.
It's mostly the desire rom I really want though, but the blasted battery is supposedly so bad for it!
Click to expand...
Click to collapse
turn off bluetooth, gps when not using. Use a task Killer to end all tasks that you arent using to stop them polling for updates and what not. If using Facebook, Twitter and rss feeds they need to be set to update at intervals >3/4hours otherwise your battery will be absolutely ****e.

Best battery day so far

It days I've been unplugged for 8 hours and 47 minutes with 80% battery level with tweeting and texting
Sent from my SGH-T959 using XDA App

iceshinobi said:
It days I've been unplugged for 8 hours and 47 minutes with 80% battery level with tweeting and texting
Sent from my SGH-T959 using XDA App
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Click to collapse
How did you manage that? I had the phone in standby mode overnight for 9 hours and was down to 77%? This was after a factory reset with no appls installed, brightness all the way down, no data/sync on, no animations,etc.?

Idk I just notice my battery icon still looks full when usual at this time its halfway to aquarter way down idk mauve phone is now in a normal cycle I know I installed touteur yesterday since that was raping my battery and use the official twitter now and been using this app using the engadget app and little web browsing
Sent from my SGH-T959 using XDA App

Uhh your battery will "look 80 percent full" until it hits 69 percent (I think).
Go into settings > About Phone > Status to see what your real battery lvl is.

That's how I got 80% it looked full but said 80%
Now says 74% still best battery day I've had
Sent from my SGH-T959 using XDA App

Mines weird. It charges on standby. Lol tested twice. One day went to sleep for four hours on a 78% charge, woke up it was at 79%. This morning I slept 3 hours it left it on 28% woke up with 29%.... lmaoooo

My day today was similar but not quite as good.
7 and a half hours off the charger and 75% battery remaining. This is with texting moderate web browsing, facebook a market download and heavy GPS usage while trying to tweak setting to get a more reliable fix for the GPS issues.
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Does anyone know if switching from 3G/E and vice versa consumes more power? In other words if you constantly switch from 3G to Edge or GPRS does this cause your phone to consume more power than if you were in same 3G cell entire time?

I'm in orlando so 3g all thee time
Sent from my SGH-T959 using XDA App

srqt said:
My day today was similar but not quite as good.
7 and a half hours off the charger and 75% battery remaining. This is with texting moderate web browsing, facebook a market download and heavy GPS usage while trying to tweak setting to get a more reliable fix for the GPS issues.
Click to expand...
Click to collapse
How is your display so slow at under 40%? My usage is always around the 60-75% of battery usage for the display. This is with a live wall paper or regular wall paper. Any settings you want to share with us?

This how mines look
Sent from my SGH-T959 using XDA App

I get 3G most of the time as well, but in many places where i used to get 3G on G1, i only get E now on Vibrant.
Many years ago I read that radios power consumption spikes up significantly when its doing a call "handshake" or switching from one cell tower to another on voice calls. It would be reasonable to assume that because Vibrant radio is weaker, it leads to more power being consumed due to more frequent cell and data protocol type switching.

michael800 said:
How is your display so slow at under 40%? My usage is always around the 60-75% of battery usage for the display. This is with a live wall paper or regular wall paper. Any settings you want to share with us?
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I think the display percentage is low because the GPS usage I had took a decent chunk of the battery.
No special settings to speak of. I use ADW launcher usually have brightness down all the way unless I am using the phone outdoors (which is not very often) I have a regular background.
The only thing I can say that I changed recently that might be helping my battery life is that I changed my ATK settings to put the security level at medium while already ste to Crazy and to kill on screen off.

No god's and mine 45%
Sent from my SGH-T959 using XDA App

srqt said:
I think the display percentage is low because the GPS usage I had took a decent chunk of the battery.
No special settings to speak of. I use ADW launcher usually have brightness down all the way unless I am using the phone outdoors (which is not very often) I have a regular background.
The only thing I can say that I changed recently that might be helping my battery life is that I changed my ATK settings to put the security level at medium while already ste to Crazy and to kill on screen off.
Click to expand...
Click to collapse
So you are using ATK. I had it on my phone earlier this week and in standby mode I was only using like 6% in 10 hours. Last night I did a factory reset (phone was lagging) and did not have ATK installed (had default wallpaper, brightness down all the way, no animations) and in 9 hours I dropped to 77% just in standby mode.
So I installed ATK again today and see how it goes. I haven't installed my apps again and using standard touchwiz (had launcherpro installed before the factory reset). Previously I had ATK set on Crazy and kill on screen off as well. I think I had security on High though.

My Battery Life WOW! *Pic for Proof*

Using Myn's ROM with the Battery Tweak, I have FaceBook syncing and I have 2 gmail accounts syncing along with Weather every 3 hours, Facebook every 2 hours.
Nothing else as of now and using Itching Thumb App.
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I get that stock with fairly heavy usage.

now lets see that screen on time.

ronron23 said:
now lets see that screen on time.
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Not needed. From the pic he attached it's obvious the phone was in standby most of the time.

Man, you even use ya phone?
What is with this obsession of battery life goin on 'round here? I say, as long as you can get better battery life than a stock rom, you've won. Keeping the phone on for a day or two without charging seems like a good idea, but everyday isn't the same, and one day you may need to use it way more than any other day..if you start that day off with only 30% just because you wanted to see how long your battery would last, then you really gotta limit how often you use your phone just so that it can make it till the next time your around a charger.

How do u check wake time?
Sent from my PC36100 using XDA App

I agree, but it want a heavy day. When I finally did have 14% left and used tv flash battery seasoned super fast. I forgot, I'm using juice defender too
Globetrahter

The battery needs to be charged? I bought my phone back in June. The battery is now at 70%. I figured I just had to buy a new one when this one runs out.

Barely used phone. Come on.

Display 4%? Is that possible?

I can go a full day and a half, 36 hours, without a charge and I am using the original sense android... and I use my phone normally, I text, read usatoday, tmz, check email a few times, use the xda app... and I have wifi on all the time! What's this beef with battery life on these forums? Mine lasts forever! I just have things update manually, I don't let anything run without my permission.
I do, however, turn my phone off the 6 hours I am sleeping.

wifi is on = low battery usage, atleast in my experience.

Indeed. I got 1 day and 19 hours on stock nonrooted 2.2 back. and i used it for some medium texting. and some gps applications...maybe 2-3 hours max awake time. i dont think you used it much...the excessive 3G usage from FB doesnt mean anything.

g0ldenchild562 said:
How do u check wake time?
Sent from my PC36100 using XDA App
Click to expand...
Click to collapse
You should be able to get what you're looking for from the Spare Parts app.

According to my calculation thats is 69min of display usage.

g0ldenchild562 said:
How do u check wake time?
Sent from my PC36100 using XDA App
Click to expand...
Click to collapse
Menu > Settings > About Phone > Battery

drsiaca said:
According to my calculation thats is 69min of display usage.
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Click to collapse
According to mine, it's 122 min of screen on usage.
I had this scenario on my phone running myn's rls2 + king cfs #11 yesterday:
since unplugged - 24 hours
display on - 1 hour 25 minutes
charge remaining - 50%.

so i wanted to find out how long the battery would last on standby, and to my surprise.. it turned out to be nearly 58 hrs!!! that was on stock sense rom. non-rooted. and of course with very very minimal use. i basically just left the phone alone on my desk or in my pocket all day.
here is the screenshot i took back in july:
but that kind of battery life is unrealistic with normal usage. I am a moderate user (on the higher side), and i typically put my evo on charge everyday in the morning when i get to work (on weekdays). so, the charge on my phone lasts about 25 hrs with normal usage, that usually means about 4-5hrs of Awake Time. this is after rooting the phone. and i am using a stock rooted sense rom. i have had similar results before rooting the phone as well.
on weekends, i find myself charging the phone about 3 times (over 2 days), as the usage of the phone goes very very high.
i have a charger on my desk at work for the weekday charging, and a charger in my car for the weekends.
i have recently installed setCPU, and havent really seen that making too much of a difference, but that perhaps has to do with my usage pattern.
as pointed out in many a threads, signal strength is one major factor when it comes to battery drain. i live in Atlanta and i have great Sprint coverage where I am located, and that makes a world of difference.

Globetrahter said:
Using Myn's ROM with the Battery Tweak, I have FaceBook syncing and I have 2 gmail accounts syncing along with Weather every 3 hours, Facebook every 2 hours.
Nothing else as of now and using Itching Thumb App.
Click to expand...
Click to collapse
it would help if you indicate the battery life that you were getting on stock or any other rom you were using prior to this. because there are so many variables that come into play as far as battery life is concerned. so that will help put your claim into some perspective

GaryJ51 said:
The battery needs to be charged? I bought my phone back in June. The battery is now at 70%. I figured I just had to buy a new one when this one runs out.
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hahah.. funny

I'm Getting Great Battery Life!

I installed OMGB-6 when it was released. Then flashed invisiblek #21 kernel and the new market. Since I last charged it, I've talked on it for about an hour, used the web-browser (Skyfire) fairly moderately, sent a few emails (Gmail), and spent a total of about an hour of GPS through the application WAZE. I'm left at 22% battery left after about 22 hours of use.
I've been fairly lazy with regards to changing the screen brightness, so it's been on about 50% brightness. I've left sync and gps on during the whole time.
I've been using Watchdog as a smart task manager. I have SetCPU installed, but I haven't used it at all.
Here are some pics:
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I have not installed the kernel but my battery life is terrible. I barely have any apps and I do not use my phone a lot. I love the rom (favorite by far). Should I try to install the kernel.
Sent from my Htc Incredible using XDA App

rllong1 said:
Should I try to install the kernel.
Sent from my Htc Incredible using XDA App
Click to expand...
Click to collapse
Can't hurt, just nandroid first, or have a spare kernel handy.
Sent from my ADR6300 using XDA App

I chewed through my battery in about 10 hrs today with the same kernel.
Guess I use mine a lot more. I've also got 26 hrs out if it when I barely use it.
Don't think you get great battery life when you don't use it much.
I'm in CM 6.1 but that wont really matter.
Sent from my Sprint Galaxy Tab

True, I haven't been using it all that much. But compared to other ROM's I've used, this get much better battery. Everything else I've tried out got me a max of ~12 hours even on idle the whole time.
Definitely try to install the kernel. Can't hurt! Just make sure you always have a nandroid backup available.

anekdotos said:
I installed OMGB-6 when it was released. Then flashed invisiblek #21 kernel and the new market. Since I last charged it, I've talked on it for about an hour, used the web-browser (Skyfire) fairly moderately, sent a few emails (Gmail), and spent a total of about an hour of GPS through the application WAZE. I'm left at 22% battery left after about 22 hours of use.
Click to expand...
Click to collapse
Stock Battery?

50% Brightness?!?!?! Wow....battery life is not worth looking at a dull screen. 100% all the way for me...im using 1800mah from ChiChitech that I got for $20. Seems to help enough.
I'm also running a Gingerbread ROM (Evervolv a17) but can't tell what difference it's making on battery.

h3rmanmunst3r said:
50% Brightness?!?!?! Wow....battery life is not worth looking at a dull screen. 100% all the way for me...im using 1800mah from ChiChitech that I got for $20. Seems to help enough.
I'm also running a Gingerbread ROM (Evervolv a17) but can't tell what difference it's making on battery.
Click to expand...
Click to collapse
the screen is not dull when it's set low...lol 100% brightness is like staring at the sun for me.
Sent from my ADR6300 using XDA App

gr.ayre.st/s/screenshots/android/incbattery_0.png
gr.ayre.st/s/screenshots/android/incbattery_1.png
gr.ayre.st/s/screenshots/android/incbattery_2.png
Edit: I made some screenshots but XDA's spam prevention (no external links for new accounts) prevents me from actually linking them. You can copypasta if you're interested in the details.
Hydra 1.13 overclock kernel, stock ROM, stock battery, auto-brightness. I'm currently at 20% battery after 2.5 days. Light usage over the weekend, but there is an hour and a half of talk time in there and a half hour of reading.
The trick to DI battery life is keeping the data network usage/standby under control. If you're trying to send/receive data with no signal, the phone will burn through its battery in 4 hours and I've used 20% in 15 minutes trying to book a flight on a low signal connection.
Realizing this took me a few months since I live in NYC and as such, go through a lot of signal shadows. Some days my phone would be at 50% battery after 12 hours, other times it'd be dead after 6. I now realize that the short days were caused by sync services trying to run when I was in a shadow. You can diagnose this for yourself by going to the cell standby section of the battery usage. If you're over 10% or so without a signal, you have this problem.
You can handle this manually by holding down the power (on the stock rom) and enabling/disabling mobile network. This is a pain in the ass.
I handle this with some simple Locale rules along with the Mobile Signal and Mobile Data plugins. The first is to shut off the data when there's no signal. The second is to shut off the data at work where I'm usually but not always on a wireless network. The third is to shut down the data during my normal sleep hours and airplane mode if I'm at home.
These easily got me to 36 hours so I grabbed an undervolt kernel, which gets me to 2 days of regular use. Daily I do about 15m of talk, 40m reading news/email on the subway, and another 30 mins browsing/messaging/misc. My monthly data use is ~350MB.

While it is likely true that the OP and others have good battery life under their specific use conditions, battery life in general on smart phones is mediocre to poor at best. I have friends with various different models of smartphone (including iphone) and across the board battery life is not good. The exception is blackberry, but I don't consider those competitive from a tech and feature standpoint. Obviously different people are going to have different opinions and experiences based on the various factors that influence battery longevity.
The solution is to stop worrying about it, get a spare or two or three and pop in a new battery when one dies. This imo is one of the best things about the Dinc and Android phones in general. Just my 2c.

[Official] battery stats thread

Once we get charged up (and back down), let's see how the battery life in the S4 compares to the quad core.
Please make sure to include your screen on time, as that is the best indicator of light/heavy use.

pleasantly surprised
I can't believe how good the battery has been so far, 84% after 13hours (over night)
I am a light user. still - that is impressive for stock. I never got close to that with my OG Epic on stock which was usually 3% per hour.

davidmumper said:
Once we get charged up (and back down), let's see how the battery life in the S4 compares to the quad core.
Please make sure to include your screen on time, as that is the best indicator of light/heavy use.
Click to expand...
Click to collapse
Mostly on WiFi
Screen brightness set to max
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Sent from my SPH-L710 using Tapatalk 2

1h, 3M Battery down to 76%.
screen on for 38 min, 33% of battery usage.

Heres mine on a first day full charge...

Not too bad for first day with moderate to heavy use!

This is heavy usage. Screen on time of 3.5 hours. Downloading Max Payne and a lot of apps. Downloading and listening to audio on Google chrome. Lots of Pulse usage. Games, YouTube, and 30 minutes of phone calls.
*edit* Bluetooth and wifi on all day long.
Sent from my SPH-L710 using XDA

More information is better for those of us living vicariously through you guys. Remember to include screen-on time. Thanks!

Here's mine for the first full day. Should my cell idle be taking up that much of the battery?
Sent from my SPH-L710 using Tapatalk 2

one thing im NOT noticing here is Allshare Service taking up a high percentage in your guys battery stats...
on mine its been at 7-9% and i dont know why, i have something waking up my phone when the screen is off and it might be that... ive forced stop, but i check later and its active again, ive disabled the service and the Allshare play in the application manager but still comes back on... hmmm i think im gonna have to root and just get rid of that file, or freeze it or something

Question... Does having all the motion settings on effect the battery? Also does having the NFC and sbeam on hurt the battery?

lse4 said:
Question... Does having all the motion settings on effect the battery? Also does having the NFC and sbeam on hurt the battery?
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Click to collapse
in addition, the eye tracker thingy?

This is only the 2nd cycle. Going to wipe stats after this charge

I'm still waiting for the second cycle to finish I have the motion controls on and the eye thing and I had no drop at all overnight

sewhuy said:
This is only the 2nd cycle. Going to wipe stats after this charge
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Click to collapse
I wish I could get some stats like that. The screenshots are while I was sleeping and 7% seems like a lot of drain for it just sitting there. Only thing on was wifi. Cell standby time on is always the same as the time on battery, is that normal?
edit: the phone now shows 79% battery left with time on battery of 12h 46m; cell standby the exact same; screen on at 9% with time on of 48m. I'm fully stock and running power save mode.

Here are my stats. I think the battery life isn't too bad so far but we will see.

are the battery stats suppose to reset when you restart the phone? For dinner reason my persist even after a reboot
Sent from my SPH-L710

xtrezpasor said:
are the battery stats suppose to reset when you restart the phone? For dinner reason my persist even after a reboot
Sent from my SPH-L710
Click to expand...
Click to collapse
No, they will carry over until you re-charge or change the battery.
I was going to make a thread like this, but it was already here! Here are my results after my second full charge and regular usage. The results are on par with my fully modified and decked out Epic. Of course, this device has a bigger battery, but it also has a larger screen. Between the hardware and software upgrades, I'm very impressed with the stock battery life. This includes wifi on at all times as well as signal w/data. Some motion features are enabled, nfc is not, and google sync is off (I use stock email). Now how much further can this be improved?? Remember not to be discouraged, Screen On times will vary depending on what the phone is used for. Showing pictures is much less battery intensive than watching YouTube videos.
DEVICE: Sprint Galaxy S III
ROOT: Non-Rooted
ROM: Stock
POWER-SAVE: Disabled

Calibrated

sewhuy said:
Calibrated
Click to expand...
Click to collapse
What is involved in calibration?