Some tecnical question on N1 - Nexus One General

Hi guys,
i've my Nexus from about a week. My battery life is about 24hr but I use phone with Push mail (activesync with TouchDown). I don't know if I can boost battery life with a custom kernel UV.
I want to know if in sleep mode, the Snapdragon is fixed at 1Ghz? Or only with a custom kernel it goes down to 245mhz? Can this give me more battery life?
Thanks!

the phone idles at 245 mhz in all roms, not just modified ones. otherwise the phone would only live for 2 hours, tops, before the battery runs out.
in sleep as in "pc like standby" the cpu turns itself nearly off. from time to time it will wake up (timer based, interrupt) to do something, without turning the screen on. depending on load it will set the cpu clock accordingly. (generally it should be on less then 1% of the time)
you can actualy see this quite nice when you open an ssh session to the phone and switch it "off". every input in the session now takes ages to complete, because the phone aggressivly tries to sleep.

Your biggest power drain is going to be the screen. Try turning your brightness down, or if you haven't already, enable the auto brightness. I found this saved me a lot of power.

Related

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.

Deep sleep question.

Just one simple question. When phone is in deep sleep, the cpu's running speed is the min frequency I choose from the cpu settings or a default lower one?
I use smart ass 2 with min at 768 and max at 1516 . So in deep sleep my phone is running at 768?
Thanks in advance...
Sent from my Huawei u8800 using XDA Premium App
spirosbond said:
Just one simple question. When phone is in deep sleep, the cpu's running speed is the min frequency I choose from the cpu settings or a default lower one?
I use smart ass 2 with min at 768 and max at 1516 . So in deep sleep my phone is running at 768?
Thanks in advance...
Sent from my Huawei u8800 using XDA Premium App
Click to expand...
Click to collapse
Not 100% sure but freq is minimum as it can be. And if cpu is not used no metter is freq 10000MHZ or 300Mhz it uses almost the same power. But when cpu is in use freq is important to power usage. Freq management is good not because it lowers freq but because it lets use lower freq on things that is not require hi freq. so it saves LITTLE LITTLE BIT of power. In idle mode (deep sleep) no meter what freq is.
But i still don't understand the need of governor. It's good only in cases where you overclock cpu but if don't - i don't see why it should be used.
PS Use app called CPU SPY it shows on what freq your cpu is being used and how much of the time.
Thanks! I use CPU SPY and it says tha about 60% or more is in deep sleep, 15%-25% is at 768 and the rest higher, which seems to be a good thing. But my phone still lasts for about 10-15 hours with normal use.
So i thought that maybe my min 768 frequency drain a lot of battery.
To clear things up a bit I use latest oxigen rom+latest franco kernel+zram+Juwe ram script...
Actually deep-sleep state is a special state supported by your phone MCU. In this state, a lot of functionality (therefore a lot of logical gates) are disabled thus MCU consumes very low power compared to normal functioning states. The thing about a CPU/MCU is when it is running even if there are no work to do no code to process, it has to run some command. While idle it must run NOOP (no-operand / no operation) command or do something equally unnecessary like counting a not required number. But in deep sleep mode, MCU actually stops working except for core functions to keep your phone going on.
Think about it this way, in a normal working state, CPUs most basic functionality is to read a command from memory, execute it and proceed to the next command to continue. Thus, in an operating system or a single purpose embedded software, CPU/MCU has to execute a "do nothing" command when you have no job to give it. But even a "do nothing" command need all of the MCU/CPU resources to be kept readily available. If you're sure that you have absolutely no job for your MCU/CPU to do, what you can do is to tell it to go and sleep fr a while until you wake it up again. In sleep, MCU/CPU can shut down a lot of its support systems like math processing, external memory access, graphics related functions (if any), even IO outputs. Depending on your CPU/MCU, this means until an interrupt occurs or a special sub system wakes it up, most of the sub-systems within your MCU/CPU thus may be millions of transistors will not be working so, your CPU/MCU will not consume as much power.
In layman's terms, deep-sleep state is a special state that shut down most of your MCU in your phone, thus while crippling it by removing its ability to function, making sure that it doesn't consumes much power. So OS (Android) (with the help of some additional hardware) controls when your MCU will sleep and under what circumstances it will wake. So it shuts down the engine -so to speak- when you're not using it for long terms and saving fuel rather than leaving your car on idle.
Hope this helps..
Thanks t_d_z. That is also how I imagined things...
But what is wrong with my battery which today, for example, went 33% down in 5 hours with 68% (from cpu spy) in deep sleep, without wi-fi on.
As i said above, I use latest oxigen rom+latest franco kernel+zram+Juwe ram script+smarass2 governor...
I also calibrated my battery by wiping battery stats, like i read in a post.
I have read in an other forum that if you use smartass (I use smartass2) or ondemand (I think...) governors, the governor is learning your habits and after a week you see the difference. Is that true?
Finally, can you guys who have "good" battery life, post your settings? (By settings I mean: rom, kernel, governor with cpu parameters, how you use the phone and everything else you think is important).
Thanks again...
I get about two days of battery life. I use Oxygen without any modifications. CPU is min. 245 (or something like that with 200, I dunno now) and max. is 800. Wifi is always on when I am home.
Try installing Oxygen-r1 and use it with a full battery, do not change anything and do not install too many apps. There will be apps that just won't stop running (like BBC or CNN app), I do not install those. Then you will see how long your battery lasts. If you just write some messages throughout the day and call somebody for 1-3 hours you should get about 2 days.
Then install your apps and test it again - maybe your apps are the problem.
spirosbond said:
Thanks t_d_z. That is also how I imagined things...
But what is wrong with my battery which today, for example, went 33% down in 5 hours with 68% (from cpu spy) in deep sleep, without wi-fi on.
As i said above, I use latest oxigen rom+latest franco kernel+zram+Juwe ram script+smarass2 governor...
I also calibrated my battery by wiping battery stats, like i read in a post.
I have read in an other forum that if you use smartass (I use smartass2) or ondemand (I think...) governors, the governor is learning your habits and after a week you see the difference. Is that true?
Finally, can you guys who have "good" battery life, post your settings? (By settings I mean: rom, kernel, governor with cpu parameters, how you use the phone and everything else you think is important).
Thanks again...
Click to expand...
Click to collapse
Look not at cpu spy but in battery usage to find out what drains your battery. And i can tell All roms are kinda lame in terms of battery, except CM7. In deep sleep it takes about 7% of battery in 10hours. I tried all roms but non of them was so efficient. But latest franco kernel (which i think even more improves cm7 rom) does not support cm7 right now, so i've attached older version if you would like to test cm7+franco kernel.
With normal usage of 50 sms and 30minutes of calls and sometimes wi-fi to download few apps and 20minutes on easy games my battery lats about 18hours. Whan only sms it lasts 30hours. depends how long lcd is on
Well, I'm not an expert on smart phone OSes but I'm an expert on embedded systems and micro controllers. If the designers are not really stupid (which I'm sure they are not) all the peripherals gets suspended when the main CPU goes to deep sleep mode. So, it is almost impossible for the phone to consume much power in deep sleep state. Most likely your phone consumes that power the rest of the time when it is not in sleep mode. I agree with Tommixoft, you should use battery usage info rather than CPU spy to find what drains your battery. Also, here is a quick check list about what consumes power :
1. Screen, especially when it is brightly lit
2. GSM network (Even when you're not talking to phone, GPRS/Edge/3G network communications drains almost as much power)
3. Wireless network
4. GPS
As an additional note, if your phone is not going to sleep mode regularly try to uninstall applications that have "prevent phone from sleeping" security setting.
Hope this helps, and of course there are a lot of more experienced people in the forum that knows about the details of the kernel so they might provide additional info.
Regards,
---------- Post added at 05:15 PM ---------- Previous post was at 05:10 PM ----------
Oh I forgot to tell the MOST important thing, 768MHz is way too high a value to set as minimal frequency. Try to set it 245. I use 122 MHz and it work pretty well. Don't forget, when you need the CPU power, the governor will provide it for you.

To all kernel developers please look here!

Hello everyone! I was just wondering if one of the developers can look at here. It's about a frequency in the kernels that may improve our battery life. Untill now all the kernels are working really good, but i was wondering if one of the developers can make this frequency called "Deep Sleep" working when we don't use our phone much. If someone can make this freq working more than the others when we don't use the phone i think we are going to have a perfect battery life! Thanks!
http://forum.xda-developers.com/showthread.php?t=1253853
This is the thread of the x10 kernel. There you can see that the deep sleep is using more than the minimum frequency. I think that this frequency is using some low voltage or something like that!
Looks great this kernel to X10,the devs make lots of things on it,look how many CPU governors they have!And these deep sleep seen great too!
Hope our devs will take a look and see what features they can bring to our X8!
I hope that someone will see this because i think that those things can work on our device
We have Deep Sleep on X8. Install CPU Spy from Market and you will see. Here is screenshot from my phone:
+1 i hawe spy cpu and deep sleep is to.
bad in this kernel deep sleep hawe changed voltage on sleep freguenz and hi has many improwments
Yes that is what i am talking about ... we have deep sleep but the frequency is not changed (i think). That's why i posted this so the devs can take a look at it
Do you know what is Deep Sleep (sleep mode)? There is no frequency. It is like sleep mode on computer or laptop. I have found this about it in Google:
Q: My question is what exactly does "sleep mode" do on android systems?
A: Primarily, it shuts down the CPU. Along the way, non-essential radios (WiFi, GPS) will have been shut down as well.
Q: What does it stop, what doesn't it stop, etc.
A: About the only thing you can count on not stopping is the GSM or CDMA radio (for incoming calls, SMSes, and IP packets) and AlarmManager.
Q: By sleep mode I mean, of course, when you press the power button and the screen goes black.
A: Actually, that's not sleep mode, per se. That is the screen turning off.
The device will go into sleep mode shortly thereafter, if nothing is keeping it awake with a WakeLock. However, there is no guarantee that within a millisecond of you pressing that button and the screen turning off that the CPU is off.
Click to expand...
Click to collapse
If we don't have Deep Sleep battery will be drained very fast

[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 !

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