Database Users

how do you guys get great battery?

i have been reading about some of the battery u guys get and all i have to say is......how do u guy get such great battery life?! i don't get any where near that. thinking of deleting pure calendar since i heard it takes up a lot of battery. but do live wallpapers eat up that much memory? i got other widgets like beautiful home (updates ever 15 minutes), Mobile Buzz widgets, myspace (yea i kno. cant seem to get to facebook yet. unless some of you guys want to add me there ) widget, Process manager widget, Touiteur widget that updates every three minutes, FML widget, some beautiful home widgets, Yahoo NFL widget, Android Guys widget, i have Nimbuzz IM always running, Weatherbug on my notification bar that updates every 15 minutes, battery indicator, and wifi (when im at home). my display at 140/225 (power manager) and i have most of my widgets on ignore when i hit the kill all button on Process manager. what apps you think that i don't need to have running would help battery life? you guys that have SetCPU, what can u recommend to set my profiles at to see better battery life? my current set up is:
Charging
998 Max
245 Min
Sleep/Standby
384 Max
245 Min
Power > 100%
998 Max
768 Min
Power > 30%
614 Max
245 Min
what do you guys suggest to improve my overall battery life? ANY help at all will be greatly appreciated
**PS, i do the average usage of web, IM, a lot of texting, little to no myspace, twitter always running, and some flash video. also is it bad if i charge the battery a lot?**

I've had most noticeable battery improvements from using JuiceDefender and Switching the Network Type to GSM (auto) PRL. Generally getting about 17 hours with I would say heavy usage.

This message was deleted by its author

i guess u shouldnt be using
998 Max 768 Min on <100 setting to save battery..
imho the default 998 Max 245 Min ondemand (read setcpu=off) is the best setting..
afaik cpu lowers the clock on sleep by default.. so why bother?
same goes to all app-killers and auto-process-killers.. not needed =)

All those things that update frequently are what eats your battery. Every time an app wants to update it has to wake the processor and radio connections, do its thing and then shutdown again. If you've got this happening every few minutes your battery won't last the day.
I don't have anything updating more than once every 3 hours. That way I get 2-3 days battery life unless I'm using the phone heavily.
p.s. app/process killers won't help. Infact they generally make things worse. If the processes are sleeping (which they will be if you aren't using them or they aren;t auto-updating) then they don't use any processing time or power. Auto killing processes does however use power......

GlenH said:
All those things that update frequently are what eats your battery. Every time an app wants to update it has to wake the processor and radio connections, do its thing and then shutdown again. If you've got this happening every few minutes your battery won't last the day.
I don't have anything updating more than once every 3 hours. That way I get 2-3 days battery life unless I'm using the phone heavily.
p.s. app/process killers won't help. Infact they generally make things worse. If the processes are sleeping (which they will be if you aren't using them or they aren;t auto-updating) then they don't use any processing time or power. Auto killing processes does however use power......
Click to expand...
Click to collapse
Exactly what my reply was going to be. If you don't need all that stuff, then either turn off the widgets or set them to only update every 1+ hours. The internet will kill your battery. Its nice having stuff at your fingertips everytime you turn your phone on, but are you really checking it every 10-15 minutes?
Live wallpapers also use more battery than regular ones, so even though they're pretty and nice, they can use more battery. I'm not sure how much more though, it might only be .5-1%/hour extra.
Also, if you want to use SetCPU, take t0ols' suggestion. If you're setting the minimum to 768, then that's the slowest it'll run. By default, it'll clock itself down to 245 even without SetCPU. You can also try changing the governor for the Sleep profile to Conservative or Power Save instead of On-Demand. With all that said, I've uninstalled SetCPU and my batter life isn't any worse or any better than when I had it installed. There's a thread on here where half of us say it doesn't help any and half say it does, so you might try uninstalling it too.
As far as the process managers go, I keep one installed, but only to kill some apps that continue running in the background. I don't auto-kill everything. For a while I was having pretty bad battery life while I didn't have a process manager, once I installed it, I noticed there was an app that was running in the background, using data. Some apps just aren't programmed very good and require manual killing.
Another thing, which I didn't see you mention, is screen brightness. Either set it to auto or set it to something less than half. The screen is one of the biggest battery killers there is.
Another one is your network connection. I usually leave mine on Edge only and use WiFi when I need something fast. 3G/H uses more battery than WiFi, so I'll leave WiFi on all day. If I go away from a connection though I turn it off to keep it from hunting for a WiFi signal.
If you must have 3G on, try dialing *#*#4636#*#*, go to Phone Information, then scroll to the bottom for "Set Preferred Network Type" and set it to GSM Auto PRL instead of WCDMA Preferred. Some have reported that this helps with their battery life.
Hope that helps.

Isn't this a duplicate of a duplicate of a duplicate of a thread?
My N1 with K9 Mail (2 online IMAP, 4 poll folders), Latitude, random stuff, including Pure Calendar... 3%/hr. That's as good or better than my previous smartphones. Google syncing cal/contacts, but not mail.
I don't have Facebook or Twitter syncing.
I'm happy with the battery life.

What am I doing wrong here?

Ok I got the X10 a few days ago.. loving it.. now..
How do I extend the life of the battery? I know theres a ton of topics on this but I can't seem to get more than 12hours..
- I use StartupAuditor and pretty much stopped most apps from running at start.
- I use ADW Launcher
- I use JuiceDefender
- Timeout - Screen timeout after 15s, lock after 2mins
- Schedule - Enable APN/Wifi for 1m every 15secs (for Moxie Sync/Mail - Push)
- Screen - Leave APN/Wifi enabled while screen unlocked (So it disables it after it has been locked)
Any help is appreciated.

After a couple of weeks your battery life should get better with out you having to do anything. Just be patient and let it fully discharge before recharging. Also restart your phone after a full charge and after using wifi and gps.
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force close the face recognition will save alot of power, face recognition sucks the cpu hardly!

wingz85 said:
After a couple of weeks your battery life should get better with out you having to do anything. Just be patient and let it fully discharge before recharging. Also restart your phone after a full charge and after using wifi and gps.
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Click to expand...
Click to collapse
Discharing a battery is bad isnt it?

Well your problem may lay here
"- Schedule - Enable APN/Wifi for 1m every 15secs (for Moxie Sync/Mail - Push)"
Your using Moxier which other X10 users have identified as a huge power user and according to you, your also using APN/Wifi for a minute every 15 seconds..........so it's essentially never turning the APN/Wifi off :-S
Hope this helps!

Also fully discharging your battery every now and then is actually beneficial for your battery.

Quite certain the 1 minute every 15 seconds is a typo
Juicedefender defaults to 1 minute ever 15 minutes.
I removed ATK and Juicedefender, I found they only screwed up things in the phone and after removing them I noticed no change in battery life. (If anything, my battery life increased after removing ATK)
The best things for battery I have found to be.
-- Alternate launcher (I use ADW, I think Helix is better for battery performance but ADW has more options).
-- First 5 charges, discharge battery completely and do this again once every month or so
-- After full charge, power cycle phone (Turn off/on)
-- Use quick settings to turn off GPS, WiFi and Bluetooth when you are not using them
-- Make sure you back out of programs when you're done with them. This will close most applications so they are not running in the background. Certain apps (like a dolphin browser) have exit functions under more options. This is useful as back will just go to the previous page.
Note: Force closing applications which you see open in the background may use more battery as it may just start up again. Constantly killing and opening the program will use processor/battery power. Whereas many programs, when open in the background, are not using active process power and Android OS will pause/stop applications which are not in active use, by default.

xxsashixx said:
- Timeout - Screen timeout after 15s, lock after 2mins
Click to expand...
Click to collapse
Where can i find the timout setting for the lock?

Screen brightness turned down. Wifi instead of 3g. That's what I do. And I think I get around 15 hours. Still kinda bad. But better than nothing.
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From my experience..
I find 3G has better battery life than WiFi, unless you are constantly browsing. When 3G is active, but you're not browsing the web and stuff, I find it doesn't use much battery. WiFi, however, uses up loads of battery when the phone is idle.

MarylandCookie said:
Where can i find the timout setting for the lock?
Click to expand...
Click to collapse
I want to know that as well Tried to find in phone settings but couldn't figure it out

Battery barely gets drained by wifi in idle state. you just go into wireless settings and set wifi sleep policy to when screen turns off.. should be fine after!!
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Mano, not sure if this is what ya after! but here goes.. go to settings, sound and display, then screen timeout!!
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As per my last question, discharging is bad isn't it? With these batteries, you have to constantly charge them so they don't loose life
Edit: Also.. if I press home button or back button that doesn't close the app.. most apps don't close like that, so I have to use ATK to kill it.. is it fine to leave apps running in the bg like that?
Edit: So I should uninstall ATK?

I also JUST got an X10 about 2 weeks ago! My battery life was so bad at first, and I ended up trying most of these battery saving apps. But to be honest, I found that they did more damage than good.
I now have everything I don't use turned off. Bluetooth, WiFi (when I'm not home at least) etc. Just skim through settings and turn off anything you don't think you'll use. And I restart my phone every morning and I get 30-50 hours out of it, depending on use. It is definitely getting better with time too.

For ATK, I would uninstall it as generally killing tasks does more harm than good. If you use it intermittently and only when necessary (and not use auto-killer) you could keep it installed.
As for apps running in the background..
-- If you press back, it should close most apps (not all, but well designed apps should)
--The Android OS is designed to pause/stop apps/processes which are not being actively used by the user and will close them eventually if left unused
-- ATK is generally only freeing RAM which is not important. It is not like Windows in the sense that more free RAM = faster speeds. It is a lot more like, more free ram = more wasted ram.
Here is a link to where I found out most of this information.
http:/geekfor.me/faq/you-shouldnt-be-using-a-task-killer-with-android/
As for WiFi sleep policy, thanks for pointing this out. It seems that my phone is already set to sleep WiFi when the screen is turned off. I find this weird as I have found significantly reduced battery life when I turn WiFi on, even when my phone is mostly unused/idle.

Mobzter said:
Mano, not sure if this is what ya after! but here goes.. go to settings, sound and display, then screen timeout!!
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Click to expand...
Click to collapse
Thank you so much Mobzter, but i was not after that As Sashi said that he has set "Timeout - Screen timeout after 15s, lock after 2mins", I know about about screen timeout but "Lock after 2 min", How? Thnak You anyway ^^

@mano. Good question. I can only find screen time out as well.
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Sent from my X10i

i have noticed some thing strange ,the phone lasts more with apps open in backgroung than when i close them . and using my phone consumes less battery than leaving it in standby .very strange phone (may be only mine ) any confirmation.

Hey Hoss,
I can confirm that force-closing/killing apps seems to be worse for battery life than leaving them alone. Backing out of apps usually will stop any cpu usage, but leave the app running. Killing/closing them will just result in more cpu power to run it when necessary.
As for standby vs usage - I have the opposite experience. The battery life on my x10 lasts a lot longer when I am working all day and not using my phone very much.
Terul

I have a clue on the battery problem

Ok... I was big into kernels, processes, everything on my N1 so I am quite familiar with tracking battery life by different means. I can provide the following information:
At 11:20pm, my phone was at 100% and had moderate signal and was connected to WiFi - full strength.
At 5:50am, my phone was at 83% battery with NO USAGE, not even the screen turned on once.
My Battery Use had the Android System at the top of the usage with ~30% usage. The CPU Usage was over 1h 30m!
The above is extremely odd since I didn't touch the phone. My N1 would've been <2 min.
In the Battery History CPU Usage section, SUSPEND was the only item with red and it was roughly 15% full.
The SUSPEND function, I believe, is the controller that suspends the functions of the phone so it can go to sleep. It should never use this much battery.
There are tons of packages in the Battery Use screen, which is weird. Some of the ones are: Settings Storage, RilFactoryApp, com.sec.android.app.lcdtest, AllShare, Error, Checkin Service, BluetoothTest, Perso, BrcmBluetoothServices, Com.samsung.InputEventApp, Sync Feeds, Settings, Factory Test, Network Location, VPN Services, Android System, WlanTest
A lot of these items (and more) show up in Advanced Task Manager, and they never existed on my N1.
I believe that destroying these services via ATM greatly improves battery life (even though generally it isn't needed in Android). After killing them all and keeping an eye on it, only 2 or 3 have respawned and my CPU usage is <1m which proportionally is much lower than the former experience.
Anyone have any ideas or input?

I've been trying to figure this out also...each battery had its on date on it..my first battery was june 21...my current one is june 28...my 6/28 battery also had a little qr barcode on it....
The 6/21 battery was pretty awful...today I'll be using my 6/28 battery for the first time...it was charged at 39% and 10 hours later overnight...it only lost 10% and is at 29% now...i must say that's pretty good because I was certain it would be dead in the morning. I'm gonna test it the next couple of days and see how it holds up....our issues may be as simple as getting the right production of batteries...wouldn't that be a relief? Lol
Or....i could just be crazy
Sent from my Samsung Vibrant using XDA App

My only battery weirdness is that I turned off autobrightness and cranked the brightness and my battery life dramatically improved. Would get home form work and have 30%, now I have something like 50%...
No clue why unless using the light sensor or making the adjustments uses more juice than it should.

popypopy said:
My only battery weirdness is that I turned off autobrightness and cranked the brightness and my battery life dramatically improved. Would get home form work and have 30%, now I have something like 50%...
No clue why unless using the light sensor or making the adjustments uses more juice than it should.
Click to expand...
Click to collapse
This isn't relevant to these problems though as I'm talking about standby time.

Oh and my android system is only at 3%
Sent from my Samsung Vibrant using XDA App

Anyone else have any ideas?

good idea
I think it is a good idea to track running tasks.
Let us create a list of tasks for stock apps and the most often used off the market ones. Then everybody could decide for herself what apps to run. Being able to compare function and price (here battery drainage) is a great thing. The list might contain:
name of the app | the name as appeared in task managers | function | typical power drainage (high, moderate, low, or how many hours will battery last if only the app were running)
I think, the top post could be moderated as needed appropriately.

I don't know, but my battery life is pretty bad. Today I had the phone connected to my laptop via USB, and my laptop connected to the wall. I was using the phone and my battery percentage was STILL going down, even though it was plugged in!
Sent from my Samsung Vibrant using XDA App

ArcticWolf91 said:
I don't know, but my battery life is pretty bad. Today I had the phone connected to my laptop via USB, and my laptop connected to the wall. I was using the phone and my battery percentage was STILL going down, even though it was plugged in!
Sent from my Samsung Vibrant using XDA App
Click to expand...
Click to collapse
Well USB will always charge slow...

hah2110 said:
Well USB will always charge slow...
Click to expand...
Click to collapse
Always plug the phone into the wall if you can. The USB from the laptop doesn't charge at the same rate.
I kill all my running apps that I don't need with ATM, then rid all unnecessary widgets, turn the brightness off of auto and on the lowest setting you prefer, turn off GSP, turn off Wifi, turn off Bluetooth and noticed a huge improvement.

iunlock said:
Always plug the phone into the wall if you can. The USB from the laptop doesn't charge at the same rate.
I kill all my running apps that I don't need with ATM, then rid all unnecessary widgets, turn the brightness off of auto and on the lowest setting you prefer, turn off GSP, turn off Wifi, turn off Bluetooth and noticed a huge improvement.
Click to expand...
Click to collapse
Now you just need to reduce screen size by 80%, get rid of the touch interface and you have a Nokia 6110. I guaranty 7 days until the battery drains.
Some other ways to deal with battery life are:
a. Get a second battery.
b. Charge the damn thing once in a while.
That way, you can actually enjoy the smartphone and think less about killing processes and *****ing how bad the battery life is on forums.

I just rooted my Vibrant the other day and installed setCPU. I set the max to 800 and the min to 200 using the conservative setting and i noticed much better battery life the very next day. Having a 1ghz processor is awesome but it seems that default settings for this phone probably has it running at the rate possibly when the screen is off also.

al74 said:
Now you just need to reduce screen size by 80%, get rid of the touch interface and you have a Nokia 6110. I guaranty 7 days until the battery drains.
Some other ways to deal with battery life are:
a. Get a second battery.
b. Charge the damn thing once in a while.
That way, you can actually enjoy the smartphone and think less about killing processes and *****ing how bad the battery life is on forums.
Click to expand...
Click to collapse
I'd have to go with this. Just some common sense will go along way. If you dont absolutely need the GPS, bluetooth, or WiFi turn them off (the phone even gives you a widget for it...). Even with the brightness at 0% its still darn bright.
Sure it requires a bit more input from the user but its still a darn good device.

popypopy said:
My only battery weirdness is that I turned off autobrightness and cranked the brightness and my battery life dramatically improved. Would get home form work and have 30%, now I have something like 50%...
No clue why unless using the light sensor or making the adjustments uses more juice than it should.
Click to expand...
Click to collapse
Thats what i did and my battery life improved alot.

[hint] battery saving tips

Disclaimer; This does not damage your phone at all or fry/mess your cpu.
This method is used to lower CPU stress and increase Battery life
This method works for all rooted phones.
IMPORTANT: The newer versions of SetCPU might prevent your phone from entering deep sleep. Download version 2.24 from the following link which is the one with no problems and completely works 100%.
LINK
Deep Sleep breaks when charger is plugged in, you can see this by CPU SPY application available on playstore
Stop Downloading Battery Saving Applications, they do nothing and uses RAM.:silly:
Also Turn BLN off when you are sleeping.(It also Consumes battery and sometimes prevent deep sleep of CPU)
Set your Brightness to minimum and disable auto brightness.
LINK to Display Brightness
Instead use lite app called - Display Brightness from play store.
Turn off wifi and mobile data when not in use.
Use toggle for auto rotation, and keep off when not needed.
For more battery Saving, disable all animations and set screen timeout to 1min.
The S plus sucks in battery life. We all know that.But here's a fix, Try Under clocking instead of Over clocking.
When screen is on:
MAX 1.4Ghz(Why to OC??, if your phone runs smoothly on 1.4Ghz)
MIN 192Mhz
Ondemand governor (This governor jumps up to max when needed but spends most time on the min freq. Best battery saver.)
When screen is off:
MAX 365 Mhz
MIN 192 MHz
(This prevents lagging when playing music and other activities when screen off)
This way, you have a beast quick phone when you're using it, and the best battery saver when you're not!
NOTE: Turn off Autosync from the settings. It's only used to sync your gmail and contacts and such. You can manually sync when you add a new contact and since I don't use gmail, I refresh manually whenever I do.
SetCPU:LINK
Specific instructions for those that can't get it to work!:
On SetCPU:
Click Add profile
Where it says Profile, select it and tap "Screen Off"
Set the frequencies you want in use while screen is off (If you want just one frecuency, put both sliders on the same number)
Set priority (in case you have other profiles, otherwise don't bother)
Select governor (Won't really matter since cpu is gonna be running at 1 frecuency)
Tap save
Go back to Profiles tab at the top, then tap Enable at the top left to make the profiles work.
For a list of most governors and I/O schedulers detailed;
Visit
1.LINK
2.LINK
To check if its all working, install CPU spy from the playstore: LINK
For Playing GAMES(HD)/HEAVY GAMES, Plug your Charger in and play if possible.:good:
Most Important thing is to calibrate battery,
Calibration of battery is needed when you change your ROM.
This process wipes batterystats.
Battery Calibration
1. Charge 100%(NON STOP)
2. Download any battery Calibration tool from play store; (Link to App)
3. Open that app, click battery calibrate
6. Unplug your charger
7. Discharge your phone down to 0% during the day
8. Charge back up to 100% (NON STOP)
This is to make sure you're using your battery at 100%. Only do this after you flash a new rom.
The worst battery killer is 3G. No matter how much you try to optimize battery by tweaking and underclock, if you have 3G on, you're gonna have a bad battery drain.
Make sure that Autosync is disabled.
Done A small test usage 14 mins , you can see in attachment your CPU should look like this.
THIS READINGS FROM MY SGA.

And never ever install the Facebook App if you want to use your phone for more than 3 hours!
Sent from my GT-I9001 using xda app-developers app

Don't get apps that take background processes like what xellar said, facebook, and some other apps like tap tap revenge 4. Anyways thanks for the tips and link to free setcpu

Other people can also share VALID ideas about saving battery.
Will help many users.

Nice advises. I'm already using these.
One more good thing is turning mobile data off whenever you are not using it, also bluetooth, lowering brightness.
Good app for doing so is Power Toggles. You can always have widget on home screen and switch on/of these things with one tap.

Riiight.. Turn off autosync, disable 3G and wi-fi, dont use apps or games.. I might as well buy Nokia 3310..my phone lasts easily whole day with wifi on..with 3G it can get me at least 6-9h which is fine.. The key is to turn off 3G when you are on wifi and turn down brightness.. Everything else is not using your smartphone smart..

1) Set your network mode to 2G only if you're not using 3G/WCDMA
2) Manually set your operator in settings.
PS: After flashing one of firmwares I got a bug - battery is not charging to 100% while phone is ON. Only to 99% and not showing a message about fully charged battery... But when the phone is in off mode - it charges to 100%. Anyone knows how to fix this thing?

apkfox said:
1) Set your network mode to 2G only if you're not using 3G/WCDMA
2) Manually set your operator in settings.
PS: After flashing one of firmwares I got a bug - battery is not charging to 100% while phone is ON. Only to 99% and not showing a message about fully charged battery... But when the phone is in off mode - it charges to 100%. Anyone knows how to fix this thing?
Click to expand...
Click to collapse
Change/upgrade your firmware...

Battery Calibration
http://forum.xda-developers.com/wiki/Samsung_Galaxy_S_Plus/GT-I9001#Calibrate_Battery
This way works without an app.

TheBlackWolf said:
Change/upgrade your firmware...
Click to expand...
Click to collapse
Didn't help. But deleting batterystats.bin helped. Thanks anyway. :good:

Take a other kernel with better voltage and governor configuration.
Set Display time to 30sec.
Kind regards.

enable "only 2G"
turn off wiifi
turn off bluetooth

black screen wallpaper help?
Sent from my GT-I9001 using Tapatalk 2

If you are on CM7 try this... From CyanogenMod setting.
This will help to save battery.

cheehsiang said:
black screen wallpaper help?
Sent from my GT-I9001 using Tapatalk 2
Click to expand...
Click to collapse
On Amoled-Displays it should help. Inverted Apps, too.
setCPU
i testet the new version of setCPU 3.0.9, deep sleep works perfectly.
If profiles are not used it exits and there is no use of RAM in both versions (But then you do not have the unique feature of auto switching profiles ).
Is there another app with auto-switching?

buffo1987 said:
On Amoled-Displays it should help. Inverted Apps, too.
setCPU
i testet the new version of setCPU 3.0.9, deep sleep works perfectly.
If profiles are not used it exits and there is no use of RAM in both versions (But then you do not have the unique feature of auto switching profiles ).
Is there another app with auto-switching?
Click to expand...
Click to collapse
Actually no idea.
But other simple and best app for controlling CPU is NoFrills.

TheBlackWolf said:
Actually no idea.
But other simple and best app for controlling CPU is NoFrills.
Click to expand...
Click to collapse
But it has no profile-autoswitching, in fact no profiles at all. Voltage control Extreme has at least profiles, but without autoswitching. What is good about Voltage Control Lite/Extreme is that it sets cpu setting with init.d and so the app does not have to start on boot

Yes that is nice...
fo more info how to use
visit here
Link to App

TheBlackWolf said:
[
Stop Downloading Battery Saving Applications, they do nothing and uses RAM.:silly:
<snip>
When screen is on:
MAX 1.4Ghz(Why to OC??, if your phone runs smoothly on 1.4Ghz)
MIN 192Mhz
Ondemand governor (This governor jumps up to max when needed but spends most time on the min freq. Best battery saver.)
When screen is off:
MAX 365 Mhz
MIN 192 MHz
(This prevents lagging when playing music and other activities when screen off)
This way, you have a beast quick phone when you're using it, and the best battery saver when you're not!
<snip>
Click to expand...
Click to collapse
Many thanks for the battery saving hints. I'll finally kick out the Task Killer App, doesn't really seem to do anything except creating problems ..
For the statement that Underclocking would help in saving battery I wouldn't fully agree. A slow cpu needs more time to complete a task before returning to a sleep state. Of course the battery drain is higher with a higher frequency (which also require higher voltages), but I believe, that there isn't much to gain on this front. As long as I don't see any profound evidence I'd even suspect, that an underlocked CPU overall could even cause more power consumption. You can also read more opinions about this in general in this thread.
Much more beneficial would be to identify those apps that cause frequent wakelocks. Does anybody have hints here, how to track down those 'bastards' ? (From my Linux I know 'powertop', does something similar exist for Android? (Or are the battery statistics in CM10 sufficient to decide which app to wipe?)

z3non said:
Many thanks for the battery saving hints. I'll finally kick out the Task Killer App, doesn't really seem to do anything except creating problems ..
For the statement that Underclocking would help in saving battery I wouldn't fully agree. A slow cpu needs more time to complete a task before returning to a sleep state. Of course the battery drain is higher with a higher frequency (which also require higher voltages), but I believe, that there isn't much to gain on this front. As long as I don't see any profound evidence I'd even suspect, that an underlocked CPU overall could even cause more power consumption. You can also read more opinions about this in general in this thread.
Much more beneficial would be to identify those apps that cause frequent wakelocks. Does anybody have hints here, how to track down those 'bastards' ? (From my Linux I know 'powertop', does something similar exist for Android? (Or are the battery statistics in CM10 sufficient to decide which app to wipe?)
Click to expand...
Click to collapse
Better battery stats is application useful for identifying partial wakelocks.
Its an paid app, but Google helps... Lol
Your above sentence about UC comes true for heavy usage.
Normal apps can run smoothly and at same speed as of OC.

Battery sometimes just crashing down

Hey there, I really have on problem with my N4 since I own it:
From time to time my battery drain just goes huge. For me it feels like that is everytime I go out and have my phone in my jeans pocket. So at some point I thought I would press the button to active the display all the time.. but thats not happening (according to GSAM Battery Monitor).
I had all 4.2.x stock ROMS + stock Kernel and also with Franco Kernel. I always had this problem from time to time.
Signal is there, there is no significant battery drain from any app. The % of each app is normal and I also dont use any app more than usually. I don't have new apps.. everything is like always. Still my battery goes from 100% to 0% withint ~ 6 hours (30 mins SOT).
Any ideas? My battery is at 47-50 Celsius, the cores go offline as they are supposed to. I tried reboots in between e.g. in case an app is bugging. But actually all apps are as usual :/
Thanks
@edit: it also happens when the phone is on my table.. i just had it with 17% left on my table, didnt touch it.. after 30 mins it was off because the battery was empty. wtf ?

The biggest battery suckers are radios and the screen. I turn off wifi, GPS and BT whenever I'm not using them. Keep a short timeout for the screen.
Unfortunately, six hours doesn't sound too far off from normal if you've got things running. I'd go through an entire battery cycle watching a 2-hour 1080p movie. Overnight, my battery dropped about 15% while only bluetooth and GSM were on. The N4 isn't really known for good battery life :\

BT is off. In general my battery holds up one day without any problems. But sometimes it goes down within a few hours and I dont know why.

Possibly a scheduled background service? Maybe Google Sync is pushing a whole bunch of data periodically?

Huge Fandroid said:
Possibly a scheduled background service? Maybe Google Sync is pushing a whole bunch of data periodically?
Click to expand...
Click to collapse
Hmm no not really. Also, it would happen every day or in some interval. Not just on random days?
besides that I dont use any syncing and also it would be shown in the GSAM Battery Monitor or general battery usage ?

I dare not say I'm a professional in battery saving, but I did break the 8 hour SOT on N4(minimum brightness of course).
Let's see, I only use 2G, because I only need internet for Whatsapp, and I greenify every single other apps.
You might undervolted too much according to your signature. -200mv might reduce heat but consume 1.2-1.5x more battery than normal voltage, its hard to explain, but its the truth, try -150 then -100.
Since you're on Franco, reduce the vibration a little, as for scheduler, I personally prefer Deadline on 2048. Governor definitely interactive, and freqs at 1.2Ghz. Because personally I dare-say at 1.2 Ghz you can run most apps almost instantly.
Like the second post said, Off wifi, GPS and bluetooth. Under settings > location settings> one is GPS and another is google location, off both. And you might still even have NFC on? No idea in this.
Download an app called build.prop editor or kernel tuner.
Modify build.prop a little. Add in pm.sleep_mode=1 and change the value of wifi.supplicant_scan_interval to 600 or 900.
Disable auto brightness and fix to something you like but below 50% .

I am not on -200 anymore.. -100 all the time
i also use greenify for nearly all my apps.
GPS, BT is turned off, Wifi normally too (tasker is doing that, depening on GSM antenna reachable or not).
The other tips are really nice but should affect the battery drain THAT much ?
Thanks !

As a little update:
It seems like this only happens at certain locations ?!
E.g. at work.. everything disabled (wifi, BT, gps, etc) .. even Tasker is disabled incase it was bugging -> about 10% for 30 minutes.
I have full connection bar to my carrier.. what the hell is that ? Battery temps are normal, same apps running as I had running when I was at home. I don't even use the phone but as soon as I get to work and my phone gets a carrier signal, the battery graph shows a rapid drop.
19:34 - 61%
20:03 - 54%
20:20 - 48%
20:54 - 38%
21:20 - 31%
Battery sitting at 37 Celsius... why.. why why ? :S

Alright now I know when my battery is crashing:
as soon as I turn off and I connect to my carrier. but why? Normally it should be exactly the other way. When WiFi is on and connect, the battery drain should become higher.
But as soon as I leave a WiFi, my phone gets hot and looses A LOT of battery very quickly.
Any ideas ? I have full signal.. but in any case.. I have the same signal as I also when while connected to Wifi.
e.g. at home with wifi - good battery life. but as soon as I turn the wifi off -> battery loss !