Database Develop

Suddenly bad battery life = battery gone bad?

Basically, a few weeks ago I flashed assonance 5.0 and my standby battery life was terrible. The battery would die by the time I got out of school which is around 7-8 hours of standby time.
So hoping to solve this problem. I flashed the captivate version of doc's rom and I have the exact same battery life. I have recalibrated the battery many times as well.
Sooo, do you think my battery has gone bad?
And if so, any good places where I could get a spare?
Sent from my SGH-I897 using XDA App

Many have posted eBay has some good deals.
I still suspect that many of these phones were shipped with crap batteries hence the differences with people using the same roms having much different battery life.

cappysw10 said:
Many have posted eBay has some good deals.
I still suspect that many of these phones were shipped with crap batteries hence the differences with people using the same roms having much different battery life.
Click to expand...
Click to collapse
Well the thing is that my battery life wasn't terrible before. Or not this bad at least :x
Sent from my SGH-I897 using XDA App

Have you at least tried reflashing to stock to see if the problem is with the roms or with your battery?

Not for an extended period... but the thing is I read through some of the rom threads. And if it was the rom people would be complaining about battery life, but no one is :/
In fact, it is quite the opposite...
Sent from.... "Waiting for Location"...

crazililazn said:
Sent from.... "Waiting for Location"...
Click to expand...
Click to collapse
That's awesome.

What, you don't like my phone sig?
Sent from a phone somewhere in the universe

crazililazn said:
Basically, a few weeks ago I flashed assonance 5.0 and my standby battery life was terrible. The battery would die by the time I got out of school which is around 7-8 hours of standby time.
So hoping to solve this problem. I flashed the captivate version of doc's rom and I have the exact same battery life. I have recalibrated the battery many times as well.
Sooo, do you think my battery has gone bad?
And if so, any good places where I could get a spare?
Sent from my SGH-I897 using XDA App
Click to expand...
Click to collapse
kernel related or bad battery!!!!

Well i am using Glitterball's latest kernel before Firebird. Or the stock kernel that came with the Doc's Captivate Rom 7.0
Either way, there has been a huge drop in battery life and I do not think it is kernel related, because on the Assonance 5.0 rom, i was running Setiron's 1.4.7 kernel with the exact same problems with battery life :'(

This is highly dependent on how you have your settings on your phone.
1) Wi-Fi constantly looking for an active network connection? At least have it go to sleep when the phone goes on standby. I only turn mine on at home or otherwise need and have access to it. Otherwise its off.
2) GPS running all the time? Personally, I rarely ever need to use it, but it runs great when I do.
3) Display at recommended brightness or higher? Recommended or less is best as far as saving battery power. I like mine all the way down. Don't need/want it any brighter.
I even tend to use only darker wallpapers as bright and lighter colors pull more power on AMOLED screens. This makes a little bit of difference. How much I don't know, but I do know that it does. Sometimes the above settings like to change on you. It's a good idea to check 'em once in a while.
While it's usually always around 60% full when I go to bed, I still charge my cell every night.
I have found that the speedmod kernel is real good for conserving battery power. Not downing other kernels as they're all real good. Speedmod handles battery consumption better in my experience.
Have you installed any new software that might be accessing the network checking for updates/feeds, etc?

Cozmo1 said:
This is highly dependent on how you have your settings on your phone.
1) Wi-Fi constantly looking for an active network connection? At least have it go to sleep when the phone goes on standby. I only turn mine on at home or otherwise need and have access to it. Otherwise its off.
2) GPS running all the time? Personally, I rarely ever need to use it, but it runs great when I do.
3) Display at recommended brightness or higher? Recommended or less is best as far as saving battery power. I like mine all the way down. Don't need/want it any brighter.
I even tend to use only darker wallpapers as bright and lighter colors pull more power on AMOLED screens. This makes a little bit of difference. How much I don't know, but I do know that it does. Sometimes the above settings like to change on you. It's a good idea to check 'em once in a while.
While it's usually always around 60% full when I go to bed, I still charge my cell every night.
I have found that the speedmod kernel is real good for conserving battery power. Not downing other kernels as they're all real good. Speedmod handles battery consumption better in my experience.
Have you installed any new software that might be accessing the network checking for updates/feeds, etc?
Click to expand...
Click to collapse
1)I always had my Wifi sleep policy on never. So its not what is affecting the battery life
2) Never have GPS on unless i need it. Heck, when i need it, it never works.
3) nothing that i didnt have before.
Basically, I haven't changed anything to cause the decrease in battery life.

Your two biggest drains on battery are WiFi (especially when consistently seeking - any new access points where you leave it on standby all day?) and your display. Could it be your battery? Sure. Go exchange it at AT&T. They shouldn't have a problem exchanging it for you
Sent using XDA app on a modified Assonance 5.2 ROM

Cozmo1 said:
Your two biggest drains on battery are WiFi (especially when consistently seeking - any new access points where you leave it on standby all day?) and your display. Could it be your battery? Sure. Go exchange it at AT&T. They shouldn't have a problem exchanging it for you
Sent using XDA app on a modified Assonance 5.2 ROM
Click to expand...
Click to collapse
Well the thing is. I have never had this battery life with my Wifi settings left untouched. So yeah, i will probably get a new battery from AT&T tomorrow and report back if it was the battery or not :]

give this thread a quick read, its more based around 2.2.1 roms but you could find some good information
http://forum.xda-developers.com/showthread.php?t=884816

[Q] What to do Against battery drain?

I now have one week to the Nexus One bought secondhand. It suits me perfectly stand alone I have a little trouble with the battery life of the phone. Morning when the phone is 100% and I come out of school (14:30 hours) the battery is still around 20%. I find this a bit short. Ok, I'll use him at school (bit Internet, twitter refreshes every 9 minutes)
There is an automatic task killer, and that helps a bit but I think there are about 80% after 8 hours battery life is a bit much. Me internet is also constantly and I really like to keep.
The battery is probably not because I've got 2 batteries and they both give the same result.
Anyone have any idea what I can do?
I've been a bit inet searched but not really found anything. I did see somewhere a separate battery behind the phone, but I'm not waiting because that makes him a bit heavier and uglier.

10% per hour is pretty poor battery life. Are you running stock Android? 3rd party firmwares can give you much better battery life (the latest versions of CyanogenMod are using less than 1% per hour when fully idle).
But there are things you can check. Have you looked in Settings -> About phone -> Battery usage? If you are using Gingerbread and you look at the graph, if there is a solid line (or mostly solid) next to the "awake" portion, it means that your phone isn't properly entering its low powered state. Download spare parts from the market and check out partial wake usage under the battery history section of that app.

Please post your screen on time value from the battery menu so we can see how long your screen is on.

I would say to go and disable background data. Disabling this will definitely improve your battery life. Of course, you aren't going to get you twitter updates but aside from that, the battery life should improve.
Sent from my Nexus One using XDA Premium App

FLAC Vest said:
I would say to go and disable background data. Disabling this will definitely improve your battery life. Of course, you aren't going to get you twitter updates but aside from that, the battery life should improve.
Sent from my Nexus One using XDA Premium App
Click to expand...
Click to collapse
While it is true that battery life would improve if Background Data was disabled (or limited via a program like Juice Defender), it doesn't take into account his actual problem. Unless it is a ton of apps constantly downloading that is keeping his battery usage in the toilet, this will only yield a slight improvement. I believe the cause is is an app (or apps) that prevent his phone from entering the low powered sleep state.
I don't know what stock Android gets from completely idle use (haven't run it since July last year), but a basic CyanogenMod install would sip between 1-2% per hour with the latest stable and the latest nightlies, some are reporting 1% every 2-3 hours when the phone is left alone (due to a fix that lets the microphones go into a deep sleep state).

Twitter refreshing every 9 minutes can not be helping, that said I doubt that's your entire issue but reducing the refresh rate should help quite a bit.

If you bought it used, it could be a bum battery. Not sure i know what apps work best to find out that info. Anybody?

Estimated Prophet Hawk said:
If you bought it used, it could be a bum battery. Not sure i know what apps work best to find out that info. Anybody?
Click to expand...
Click to collapse
The battery app in my sig is the only one that reads the chip inside your battery to tell if it's legit or not, what the battery age is, etc. Needs root to work though.

Estimated Prophet Hawk said:
If you bought it used, it could be a bum battery. Not sure i know what apps work best to find out that info. Anybody?
Click to expand...
Click to collapse
You can also get Battery Left from the Marketplace and when it gets calibrated it gives you a time until death number and some other features.
Sent from my Nexus One using XDA Premium App

Start by getting rid of the task killer.
Sent from my Nexus One using XDA App

Rediscovering SuperPower v 0.80 BETA

So I was over in the Atrix forums the other night because there was someone over there who was wanting some help deciding if they should ditch their Atrix for the Thrill 4G. The overwhelming amount of posts about some of the hitches with the Thrill were in regards to the battery consumption and the RAM getting hammered with general usage.
Over here since a bunch of us are actively doing doing what we can to try and speed the development along having being trying new things and tweaking this or that in an attempt to make some progress toward real development.
Here is a link to what I said over there:
http://forum.xda-developers.com/showthread.php?p=17448824#post17448824
So I was running back through all the apps. and such that I had used in the past on other phones and hidden in my lengthy list of apps. used to get every ounce of power out of whatever phone I was jacking with, was SuperPower. I had the paid version but it has subsequently been ditched and redone it seems and now takes the form of a BETA.
This BETA I dropped onto my Thrill and started to go through the options that are available on this version that were not there before. You can now manually go into SuperPower and tell the app. what program you want it to kill when the screen goes black, how you want wi-fi and/or radios to behave, etc. It is extremely customizable.
Until there is a custom ROM and all that for the Thrill I think we are going to have to do our best to manage the few minute undesirables this device has with things like SuperPower. So, my end result as it stands right now on battery and RAM usage, I am using a few different apps. and I will list the links below for your convenience; is after about 10 1/2 hours of fairly mid to heavy use I was sitting at about 71 % battery life. Understand I let the battery go down below 20 % then charged it back up to 100 % with no interruptions in the charging process. You should do this at least once a month just maintain good battery health and longevity anyway. Especially on powerhouse phones like the Thrill 4G.
Now when I say mid to heavy usage this is my interpretation of that; regular talk time throughout the day, 100+ text during the day, market and music downloads, 2D and 3D gaming. When it was time to charge again I was at 13 or so hours with 49 % battery still showing. Not to bad as it was blowing through battery like it was free before.
Here are the apps. I used with download links. If you have questions or anything let me know or PM me:
SuperPower BETA v 0.80(*Must be rooted by the way to use this*)
https://market.android.com/search?q=SuperPower
Chainsfire 3D(*must be rooted*)
https://market.android.com/search?q=Chainsfire&so=1&c=apps
*As a side note besides the other great benefits this app. offers what I use to help with battery usage is the Night Mode feature*
SPB Shell 3D (*This is a paid app. and worth every penny IMO. But if you are not down with dropping the change for it use LauncherPro or one of the other free Launchers out there*)
https://market.android.com/search?q=spb+shell+3d+&so=1&c=apps
Advanced Task Manager
https://market.android.com/details?id=com.arron.taskManagerFree&feature=search_result
Hotspot Guru
https://market.android.com/search?q=Hotspot+Guru&so=1&c=apps
Besides what I listed as benefits for SuperPower there are a ton more that I have not even touched on. This app is jam-packed full of modding goodness. get the app. and use at your own risk kind of thing and explore this bad boy because its a doozy. Lol! Hope this helps.

What are you doing specifically on the Superpower app to get such good battery life?

I think I am at the point that the best option....is to just return the thrill.
I tried using it as my dedicated device for a few days now and it just isnt working out. it freezes,locks up, bluetooth is not holding a connection ,just all around does not perform like I expected.
I really want to like it haha....i really like the overall physical feel of the phone. The 3d is great (after waiting a ridiculously long time for it to load) but it is just too sluggish and quirky for me to enjoy daily.
I am most likely going to start from scratch tonight and give it one more week....but without some major magical miracle (like fully working cwm, kernel development and the ability to flash O3D roms) i just dont see myself keeping the thrill.
Sent from my SAMSUNG-SGH-I997 using XDA App

00mred00 said:
I think I am at the point that the best option....is to just return the thrill.
I tried using it as my dedicated device for a few days now and it just isnt working out. it freezes,locks up, bluetooth is not holding a connection ,just all around does not perform like I expected.
I really want to like it haha....i really like the overall physical feel of the phone. The 3d is great (after waiting a ridiculously long time for it to load) but it is just too sluggish and quirky for me to enjoy daily.
I am most likely going to start from scratch tonight and give it one more week....but without some major magical miracle (like fully working cwm, kernel development and the ability to flash O3D roms) i just dont see myself keeping the thrill.
Sent from my SAMSUNG-SGH-I997 using XDA App
Click to expand...
Click to collapse
Really. Mine flies through screen's and apps with Zero Lag including 3D. As far as it sounds to me, sounds like your phone is either defective or loaded with a Ton of apps running in the background constantly. If it's apps running in the background all the time as far as I recall Froyo didn't do the greatest at managing what to shut down and when. Either way goodluck.

Thanks! As for apps...that isn't the issue for sure. There are a number of things the phone does quickly but there are a few it does not. The camera does concern me. When I open the three d can it just goes blank screen for a while and then finally comes up.
Hell even typing at times everything will occassionally just pause for a few.
I haven't given up yet. I am going to hard reset and give her one more go
malickie said:
Really. Mine flies through screen's and apps with Zero Lag including 3D. As far as it sounds to me, sounds like your phone is either defective or loaded with a Ton of apps running in the background constantly. If it's apps running in the background all the time as far as I recall Froyo didn't do the greatest at managing what to shut down and when. Either way goodluck.
Click to expand...
Click to collapse
Sent from my LG-P925 using XDA App

Try using taskiller and set it up to kill apps when the screen is off. That seems to work well for me with app management.
Sent from my LG-P925 using XDA App

taytay209 said:
Try using taskiller and set it up to kill apps when the screen is off. That seems to work well for me with app management.
Sent from my LG-P925 using XDA App
Click to expand...
Click to collapse
Personally, I have been using "Autokiller Memory Optimizer," which is NOT a task killer, but allows you to set memory limits.
This may be overly aggressive, but this is the setup I have been using, and it has been treating me very well. From top to bottom, in MB (from "foreground app" to "empty app"): 18 / 24 / 32 /100 / 125 / 150
I may tweak it down a little, but in general this setup has allowed me to multitask between apps really quickly, while Android "kills" the apps I'm no longer using. Highly recommended for (rooted) Thrill users!
While I'm at it, another useful (paid, requires root) tool for the thrill is "Autostarts."

With what I have done so far with SuperPower and such my phone is flying right along and running consistently with between 186 and 202 mb of available memory. So with the processor and RAM hauling ass I am loving this phone. I am can't wait for some some stuff to come down the pipe for this phone. There is definitely a lot of BS stuff running hidden that can slow it down but with SuperPower and the task killer and all the stuff I talked about when I started the thread I am so far satisfied.

Running mine basically how it came straight out of the box, no custom rom, only fancy apps I'm using are appkiller and setcpu right now. Battery life before I got setcpu was... less than desired. But when I got it and configured it to only use as much processor speed as I'd need for my "on the go" usage, I get enough life out of it to last me the whole day, and get home at 20% battery. What I did? Set it so it uses minimal CPU speed (30%)with the screen off, and in calls, and during normal usage it only runs at 60% and that's more than enough to handle my regular usage of texting, emails, calls, browsing, a little bit of gaming, near constant syncing, as well as a good amout of music streaming and maybe only about 50% standby time. Love this phone, dual core with half gig of ram is pretty much complete overkill as far as any phone goes. I fly through Apps only using 60% of the cpu's stock capabilities.now for the times when I'm out longer than normal (over 14 hours a day) I have it set to use minimal CPU speed at 15% battery life and less, in case of emergencies.

I'm returning mine. I either put too many apps, get too many defective phones, or just need a phone with more memory. Never had running out of application room on the Captivate or Inspire.
Camera can take up to 8-10 seconds to finally come on. This is a pain when I want some quick shots of the kids at the moment.
Mine also freezes up while I'm using the keyboard whether it's the stock or swiftkey or better keyboard. This is the 2nd thrill I've had and same issues. So that leaves pretty much the GS2 that's coming out. And Samsung scares me.

Until we get a custom kernel.....i am not aware of anything that will allow us too throttle cpu speed. what are you using? sure the apps will allow you to make setting adjustments yes....but those settings are not sticking (not on the apps I have tried)
irishpunk said:
Running mine basically how it came straight out of the box, no custom rom, only fancy apps I'm using are appkiller and setcpu right now. Battery life before I got setcpu was... less than desired. But when I got it and configured it to only use as much processor speed as I'd need for my "on the go" usage, I get enough life out of it to last me the whole day, and get home at 20% battery. What I did? Set it so it uses minimal CPU speed (30%)with the screen off, and in calls, and during normal usage it only runs at 60% and that's more than enough to handle my regular usage of texting, emails, calls, browsing, a little bit of gaming, near constant syncing, as well as a good amout of music streaming and maybe only about 50% standby time. Love this phone, dual core with half gig of ram is pretty much complete overkill as far as any phone goes. I fly through Apps only using 60% of the cpu's stock capabilities.now for the times when I'm out longer than normal (over 14 hours a day) I have it set to use minimal CPU speed at 15% battery life and less, in case of emergencies.
Click to expand...
Click to collapse
Sent from my SAMSUNG-SGH-I997 using XDA App

I'm using the xda app setCPU it's a free download for site members and only requires rooting your phone. Note that the app only controls the max and min speeds of the processor, this isn't overclocking. I don't really know that much about the app beyond what it's supposed to, and seemingly succeeding at doing. Everything that I've done with the app seems to be working fine. I tested it with min and max at only 30% CPU speed (the lowest it seems to allow for), and I definitely felt it in the way my phone responded, the entire time (atleast ten mins) up til I turned the settings back up
00mred00 said:
Until we get a custom kernel.....i am not aware of anything that will allow us too throttle cpu speed. what are you using? sure the apps will allow you to make setting adjustments yes....but those settings are not sticking (not on the apps I have tried)
Sent from my SAMSUNG-SGH-I997 using XDA App
Click to expand...
Click to collapse
Sent from my LG-P925 using XDA App

I will play with it again but i recall it doing nothing. it looks like the settings have been changed but they do not stick. Running a few benchmarks showed processor still running at full speed
I did a factory reset...will play with it when i get everything loaded up again.
irishpunk said:
I'm using the xda app setCPU it's a free download for site members and only requires rooting your phone. Note that the app only controls the max and min speeds of the processor, this isn't overclocking. I don't really know that much about the app beyond what it's supposed to, and seemingly succeeding at doing. Everything that I've done with the app seems to be working fine. I tested it with min and max at only 30% CPU speed (the lowest it seems to allow for), and I definitely felt it in the way my phone responded, the entire time (atleast ten mins) up til I turned the settings back up
Sent from my LG-P925 using XDA App
Click to expand...
Click to collapse
Sent from my SAMSUNG-SGH-I997 using XDA App

Haven't done any benchmark tests, my conclusion just came based on the results of improved battery
life to be completely honest.
Sent from my LG-P925 using XDA App

SuperPower can throttle it up a bit. It is one of the settings to be checked off.
Open up SuperPower>scroll down to: CPU Scaling: Enable and check the box
Below that is a box you can check for CPU Scaling: ondemand
Like I said in my original post there are a fair amount of options that gives us the opportunity to have our devices running at their best. I appreciate everyone's postings about what they are trying and so forth. This is how it all begins to getting stuff done. Thanks guys.

Not a problem my good friend, I'm a huge fan of this device and the potentials it possess, I am glad to be a part of any improvements that can be made.
Sent from my LG-P925 using XDA App

I am a goon...underclock works perfectly fine
Sent from my LG-P925 using XDA App

I'm glad you got it working, how's it helping you're battery life?
yeah ironic I know, a die hard Android fan like myself, doing iPhone AppleCare phone support.

47r0n1n said:
SuperPower can throttle it up a bit. It is one of the settings to be checked off.
Open up SuperPower>scroll down to: CPU Scaling: Enable and check the box
Below that is a box you can check for CPU Scaling: ondemand
Like I said in my original post there are a fair amount of options that gives us the opportunity to have our devices running at their best. I appreciate everyone's postings about what they are trying and so forth. This is how it all begins to getting stuff done. Thanks guys.
Click to expand...
Click to collapse
I can't find this settings under super power? Do I need to have a paid version of this app?
---------- Post added at 03:50 PM ---------- Previous post was at 03:50 PM ----------
irishpunk said:
I'm glad you got it working, how's it helping you're battery life?
yeah ironic I know, a die hard Android fan like myself, doing iPhone AppleCare phone support.
Click to expand...
Click to collapse
Can you post your setcpu settings?

I'm running my CPU at 600000mHz max and 300000mHz min for normal use, and babe a profile that sets it to 300000mHz max and min with the screen off. Have all my profiles set for "on demand" so it only ramps up the CPU when it needs it
yeah ironic I know, a die hard Android fan like myself, doing iPhone AppleCare phone support.

Galaxy Note Battery Life

Just got my note I was wondering if people could share their tips on how to get great battery life on the note!
any tips (even the most basic) will help all us first time Android users
So share your tips, apps, settings, etc!
Sent from my GT-N7000 using XDA App

If you want to save max battery. Turn off 3G and only use 2G. Then lower brightness. Reduce frequency of app updates.
Those are the best tips. I keep brightness on auto. And I keep updates to once an hour for most things. It give me a solid day.
Sent from my Samsung Galaxy Note.

Thanks!
I downloaded setCPU and have it so that the processor goes down to 800mhz when the screen is off.
I am not sure if that is helping or not though.. still struggling with battery life.

Get JuiceDefender Ultimate. It helps to automatically turn off your Data Network and your wifi whenever your not using your phone, it reopens them periodically to check for any updates on ur apps. Smart app and it has saved me x2.3 of my battery life.

thanks!
Do you think juice defender ultimate is better than setCPU?

Disable fast dormancy. *#9900# and the select disable fast dormancy and then save.
Sent from my GT-N7000 using xda premium

Here are some tips for prelonging battery life:
1 - Don't use 100% screen brightness at all times - 50-60% is enough, only increase it when you need to then lower it again.
2 - If your planning to use the phone for long periods, 30 minutes or more constant use then once again use 25% or so brightness
3 - When browsing/surfing the net use the lowest possible brightness as this is the biggest battery killer. Unfortunately our AMOLED screens suck a lot of juice when displaying white...
4 - Try to keep most, if not all applications to manual updates only. Otherwise decrease the update frequency.
5 - Use an alternative launcher. I find for example using LauncherPro uses less resources/cpu/ram than the default touchwizz launcher. Therefore using less ram/cpu saves battery!
6 - If your gonna game for hours then I suggest 0% brightness!
7 - Last but least watch your apps. Some apps are poorly optimized/coded and can take up a lot of ram and cpu which then eats away at your battery!

In my case, disabling fast dormancy helps save some battery. Tough not to a big extent.

Use Screen Adjuster or Voodoo display filter to further lower screen brightness.
Install and use app that has a night mode. Eg, config opera mobile to use a user css to render white text on black background.

Hey,
Before you should know that android collects statistics on your battery in order to "learn" its behavior so within the first days of use you will see a constant improvement if you battery performance.
there are also a few apps that runs in background and has the annoying habit to drain your battery:
wifi sharing
wi-fi sharing manager
social hub
try to disable those apps using gemini app manager or titanium backup.

Thanks for the great tips. My battery lasted almost 19 hours ever since I did everything everyone has mentioned!
Sent from my GT-N7000 using XDA App

uneek14 said:
Thanks!
I downloaded setCPU and have it so that the processor goes down to 800mhz when the screen is off.
I am not sure if that is helping or not though.. still struggling with battery life.
Click to expand...
Click to collapse
Capping the max CPU speed does not help battery life.
Sent from my Transformer TF101

this will also help you understand battery life
http://batteryuniversity.com/

Gary13579 said:
Capping the max CPU speed does not help battery life.
Sent from my Transformer TF101
Click to expand...
Click to collapse
How so? I've heard some people on YouTube say they save battery this way..it was the only reason I downloaded setCPU...what are your thoughts?
Sent from my GT-N7000 using XDA App

When screen is off, the cpu frequency is reduced anyway. Thats the advantage of sleep.
Sent from my GT-N7000 using XDA App

bud.de said:
When screen is off, the cpu frequency is reduced anyway. Thats the advantage of sleep.
Sent from my GT-N7000 using XDA App
Click to expand...
Click to collapse
How much is it reduced to?

kanej2006 said:
How much is it reduced to?
Click to expand...
Click to collapse
Just enough to receive calls, sms, messages, etc. What was it, 200mhz?

uneek14 said:
How so? I've heard some people on YouTube say they save battery this way..it was the only reason I downloaded setCPU...what are your thoughts?
Sent from my GT-N7000 using XDA App
Click to expand...
Click to collapse
YouTube is in no way a reliable source of information when it comes to technology. Unfortunately, neither are these forums, as witnessed by the masses of people that consistently state underclocking saves battery. I've posted about this several times before, and it seems no one ever listens or trusts me, so I'll try to lay it out as simple as I can. This effect is very well known by old school Linux nerds that would push their notebooks to get longer battery lives. Intel calls this effect HUGI -- Hurry Up and Get Idle. It essentially states that the faster a CPU runs, the more energy it consumes, but it *also* finishes it's work faster. Finishing work faster is important as it means that the CPU can go back to it's "Idle" state faster. The idle (or sleep) state uses virtually zero energy. Let me see if I can pull up the voltage table for a phone... here, found this for the Sprint Nexus S 4G and it looks to be accurate based off my memory of the CPU.
1000mhz - 1.25v
800mhz - 1.20v
400mhz - 1.05v
200mhz - 0.95v
100mhz - 0.95v
Now, let's say we have a task that takes 10 seconds to complete at 1000 MHz. 10 seconds times 1.25v is 12.5v (I know, I know, voltage doesn't work this way -- but it's a good enough approximation to demonstrate this effect (and it's to scale!) and I'm too tired to explain volt vs amp vs watt, it's 5am here). At 100 MHz, though, the *same exact task* would take 100 seconds! 100 seconds times 0.95v is, wow, 95v! By capping your CPU to 100 MHz (10% of max), you are effectively using (95/12.5=) 660% more energy to do the same task.
Now, there are scenarios where underclocking can help you, such as when your phones CPU is running at 100% 24/7 because of ****ty applications or leaked wakelocks. Although underclocking does appear to somewhat fix this, it's a complete ****ing hack and won't give you anywhere near the amount of battery life that you'd get by uninstalling the ****ty app and letting your phone go to sleep.
Make sense?
Sent from my Transformer TF101

Wow! Thanks! yeah it does make sense! I guess I should uninstall setCPU...I'm not sure what else its used for
thanks again
Sent from my GT-N7000 using XDA App

zkyevolved said:
Just enough to receive calls, sms, messages, etc. What was it, 200mhz?
Click to expand...
Click to collapse
That's great, a very efficient way to save battery...
So it's basically like a modern pc running a core i5/i7 that runs at 2.5GHz when idle or when no power is needed. However when power is needed the intel Turbo boost kicks in & increases clock speed to 4.2GHz or even higher depending on what the user set it to.
In my case my PC cpu idles at 3.4GHz & when gaming or video editing it boosts to 4.7GHZ which I've manually set it to.

Best mods (Root) for best battery life and phone speed?

I have basically every script/ mod right now done to my Revo and I use Antutu Battery saver running at level 3 (best battery saver level). I still dont feel like I get good battery life, even when not using the phone too much. I have my cpu set on rom Toolbox running 1900/ 255 on smoothass governor, which constantly switches at random. Does it switch because of my battery saver im thinking? Either way, Im trying to figure out if I should wipe my Revo and restart with just Blitz and Rom toolbox for better battery, with still good speeds. Any suggestions if I wipe clean? Or any suggestions on what to do right now? Thanks!

I'm guessing ur using gingervolt... I've had this same issue on my revolution... I've researched it and everything... I've found nothing
Sent from my VS910 4G using xda premium

Yes using gingervolt. Sorta stuck on what to do
Sent from my VS910 4G using XDA App

jmaxin07 said:
Yes using gingervolt. Sorta stuck on what to do
Sent from my VS910 4G using XDA App
Click to expand...
Click to collapse
I could be wrong but I'm guessing that setting 1.9gHz on the Max is just that, the Max. Not necessarily the "constant" CPU speed.
Sent from my Volted Ice Revo using Tapatalk.

Now this might not be the answer you were looking for, but I had found that even with multiple power-saving measure my battery-life was still terribly short. The best thing is to get an extended battery, the one for the Revo is beast in size and battery life. Also, since you didn't mention it, changing from LTE to CDMA is also good if you're not really needing your 4G speeds.

jmaxin07 said:
I have basically every script/ mod right now done to my Revo and I use Antutu Battery saver running at level 3 (best battery saver level). I still dont feel like I get good battery life, even when not using the phone too much. I have my cpu set on rom Toolbox running 1900/ 255 on smoothass governor, which constantly switches at random. Does it switch because of my battery saver im thinking? Either way, Im trying to figure out if I should wipe my Revo and restart with just Blitz and Rom toolbox for better battery, with still good speeds. Any suggestions if I wipe clean? Or any suggestions on what to do right now? Thanks!
Click to expand...
Click to collapse
Your battery life is probably not too good because of the 1900 mhz setting... I use set CPU and you can use different profiles (including screen off, charging, battery threshold below a certain percent, etc.). This helps, but I don't get great battery life without a program like JuiceDefender. The problem there is, though, that it slows my phone down to the point of it taking a minute to get working, and by that time I have already done what I need to do... sort of sucks.

Fallen224 said:
Now this might not be the answer you were looking for, but I had found that even with multiple power-saving measure my battery-life was still terribly short. The best thing is to get an extended battery, the one for the Revo is beast in size and battery life. Also, since you didn't mention it, changing from LTE to CDMA is also good if you're not really needing your 4G speeds.
Click to expand...
Click to collapse
I got the extended battery too and it is a world of difference. I can run all day and night without killing my battery. Even with moderate to heavy use, I can run through a whole day with no charger (and be comfortable). I just got mine through verizon for 24.99 the other week. I may have overpaid, but I don't trust amazon or ebay too much with some things.

samwelborn said:
Your battery life is probably not too good because of the 1900 mhz setting... I use set CPU and you can use different profiles (including screen off, charging, battery threshold below a certain percent, etc.). This helps, but I don't get great battery life without a program like JuiceDefender. The problem there is, though, that it slows my phone down to the point of it taking a minute to get working, and by that time I have already done what I need to do... sort of sucks.
Click to expand...
Click to collapse
I have an extended battery and I stay overclocked at 1.9gHz all day long. I don't use apps like juice defender or anything and I'm seeing 15-18 hours with moderate/heavy use.
Sent from my Volted Ice Revo using Tapatalk.

I use 5 different battery programs to monitor my battery and save my battery, but for some reason my battery drains in an hour.
The thing I see on here the most: monitoring programs, 4g connections, flashing left and right. People need to go to YouTube, and watch the video on how Android phones work. They are constantly learning what apps you use or don't use, they are learning how best to operate for your needs. When you flash a ROM or tweaks, it has to relearn. Sure track your battery for a day or two, see what programs are doing what and when, but then get rid of the extra crap, your phones don't need it. If you want extra battery life, get the bigger battery, you all knew coming to a smart phone that battery life sucks. Stop using app killers, and monitoring programs, they run in the background. Turn off auto run programs so one program doesn't start another.
Sent from my VS910 4G using xda premium

Has anyone measured the battery current? I would think if you are trying all these different setups and use scenarios the actual current draw is what you need to know.

markapowell said:
I use 5 different battery programs to monitor my battery and save my battery, but for some reason my battery drains in an hour.
The thing I see on here the most: monitoring programs, 4g connections, flashing left and right. People need to go to YouTube, and watch the video on how Android phones work. They are constantly learning what apps you use or don't use, they are learning how best to operate for your needs. When you flash a ROM or tweaks, it has to relearn. Sure track your battery for a day or two, see what programs are doing what and when, but then get rid of the extra crap, your phones don't need it. If you want extra battery life, get the bigger battery, you all knew coming to a smart phone that battery life sucks. Stop using app killers, and monitoring programs, they run in the background. Turn off auto run programs so one program doesn't start another.
Sent from my VS910 4G using xda premium
Click to expand...
Click to collapse
+1
the more programs running the more drain. Widgets are convenient but can be real power hogs. Simple and streamlined is the way to go for me. You can have an awesome looking / running phone by being selective with apps and avoiding redundancies. If i have an issue, i dl the program/s i want to troubleshoot with and when im done i uninstall. No need to use resources that could be used elsewhere. You can always dl the app again or save its apk to the external sd or a laptop or both (thats what i did). Ofc, it will have a new learning curve but settles in a couple days, for me anyway.
Sent from my VS910 4G using XDA App