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[Q] For those who get 24+ hrs of battery usage

Battery drainage has been a major frustration for me with my phone. The frustration stems from the many variables associated with battery drainage. For the most part the terrible battery drainage started after flashing the modified ROMs. I believe the stock ROM was respectable when it came to battery drainage.
I am not ignorant to flashing ROMs. I have tried everything to figure out this battery problem; everything to keeping stock kernals, to battery calibration (delete battery stats), to battery bump charging, to matching radio files with RILs, to limiting data syncing, charge cycles etc.
But I am noticing that some of you are able to get good battery usage from a single charge with these modified ROMs. With that said, I want to cut the variables down and see what those folks who are getting over a day's worth of battery usage from a single charge are doing. The best indicator for battery usage to limit variables would be the battery usage standby rate with data network on.
I am not getting any better than 8%/hour on standby for any of these ROMs. That is crap. I wake up in the morning after 8 hours and there is only ~35% battery left. Unacceptable. I figure no more than 10% should be lost in 8 hours of standby.
So for those who have good battery usage, please answer the following questions so that we can eliminate all the variables.
1. What is your standby battery drainage rate?
2. What version phone do you have (TMoUS or EUR)?
3. Clockwork Recovery version?
4. What ROM are you using?
4. What Radio and RILs are you using?
5. How many charge cycles are you doing after the battery calibration and before you are getting the good standby rate?
6. Are you using any battery saving applications?
Please help if you can. Everyone seems to emphasize speed and performance but battery life is number one priority for any phone in my opinion.
Thanks

I'm currently running the P3D Neon ROM. I was having the same issues you are having due to flashing a new ROM jsut about every day. The big thing I noticed is that the longer I stayed with the one ROM the better my battery was. But as I'm sure you already know that no matter what a smartphone is a battery hog anyway.

By the way have you tried this, I am using it and love it !
http://forum.xda-developers.com/showthread.php?t=1128568

Tmobile model sensation
Latest radio with .56
Latest LeeDroid
Anker battery
Latest cwm
Do a charge cycle every time my battery dies
I use battery calibration app from market
No battery saving apps
Standby I have no clue lol it sometimes doesn't budge but sometimes I get 1% every hour and 1/2
Light use I get 26+ hours.
Medium I get 16+
Heavy I get 9+
Hope that helps.
Sent from my HTC Sensation Z710e using XDA Premium App

I've had my phone a week and am using stock Rom. I've S-Off, Root and install backup. Overnite, the battery only goes down 5%
If I were u, I'd get Android Assistant from the Market and check that all apps are closed. Check ur start-up apps and clear ur cache before u shut down ur phone.
Sent from my HTC Sensation

More than likely, there are apps that are not allowing the phone to sleep when the screen is off. CPUstats will show you how long your phone has been in deep sleep, as well as your CPU clock speed.
Here is what I would try out:
1-Get CPUstats.
2-Turn off the screen for the night
3-Check to see how long the phone was in deep sleep mode. It should have been for awhile if not, you have a rogue app that is bothering your phone while it sleeps.
To check your standby current:
So far, we cannot accurately see what it is. I dont know of any app that can for our phones. I do know that the values I see cannot be correct, otherwise my phone wouldnt be lasting long.
1-Write down your current battery capacity in mA/Hrs.
2-Write down the time that you put your phone into sleep.
3-Leave it off for an hour.
4-Wake it up and check the new battery capacity.
An Example:
I started with 1900mA/Hr.
I let it sleep for 1 hour.
I found that after an hour, I was down to 1850mA/Hr. That is 50mA gone, over 1 hour time. So my standby current was 50mA/Hrs.
Now this is only a crude way of judging whether or not your phone is behaving. Since the battery apps update capacity every 5 mins or so, you may not be right on the money, but you WILL know if something is BAD. Calculating 50mA +/- 20mA means the phone is likely sleeping as it should. Calculating 300mA+/- 20mA means something is USING your phone without your permission.
Youll need to find out if some apps are syncing (or trying to sync) while it sleeps. Or, your phone may be trying to improve your signal strength.
Matt

The anker battery will help but it is not solving the problem. We need to be getting around 1-2%/hour standby drain like some of you guys are getting.

mrg02d said:
More than likely, there are apps that are not allowing the phone to sleep when the screen is off. CPUstats will show you how long your phone has been in deep sleep, as well as your CPU clock speed.
Here is what I would try out:
1-Get CPUstats.
2-Turn off the screen for the night
3-Check to see how long the phone was in deep sleep mode. It should have been for awhile if not, you have a rogue app that is bothering your phone while it sleeps.
To check your standby current:
So far, we cannot accurately see what it is. I dont know of any app that can for our phones. I do know that the values I see cannot be correct, otherwise my phone wouldnt be lasting long.
1-Write down your current battery capacity in mA/Hrs.
2-Write down the time that you put your phone into sleep.
3-Leave it off for an hour.
4-Wake it up and check the new battery capacity.
An Example:
I started with 1900mA/Hr.
I let it sleep for 1 hour.
I found that after an hour, I was down to 1850mA/Hr. That is 50mA gone, over 1 hour time. So my standby current was 50mA/Hrs.
Now this is only a crude way of judging whether or not your phone is behaving. Since the battery apps update capacity every 5 mins or so, you may not be right on the money, but you WILL know if something is BAD. Calculating 50mA +/- 20mA means the phone is likely sleeping as it should. Calculating 300mA+/- 20mA means something is USING your phone without your permission.
Youll need to find out if some apps are syncing (or trying to sync) while it sleeps. Or, your phone may be trying to improve your signal strength.
Matt
Click to expand...
Click to collapse
I like this test, I will check it out.

[Q] deep idle removed?

i wonder why deep idle is removed in every updated kernel...anyone has the answer...?i think deep idle is one good tweak in saving battery while we close our eyes sleeping..

Because some say it didn't work.. I dont know, because I didnt know what it did before it was removed
Greetzz, Jojoost.
Sent from my Nexus S using XDA App

..

is it?i think its work for me...without it, my battery drain quickly like 20 to 30% while in idle mode...i hv to recharge it back after i wake up in the morning...i think one of the problem is the ics 4.0.3 right...bcoz in ics 4.0.1 deep idle seems to be working fine and my battery last 20 hours with it..

mijul mojas said:
i wonder why deep idle is removed in every updated kernel...anyone has the answer...?i think deep idle is one good tweak in saving battery while we close our eyes sleeping..
Click to expand...
Click to collapse
Deep idle did Not conserve battery while the phone is inactive - it only reduces power consumption while the screen is off and the phone is playing music, etc.
Have you ever actually read about the function and purpose of deep idle? CpuIdle seems to have replaced it.

mijul mojas said:
i wonder why deep idle is removed in every updated kernel...anyone has the answer...?i think deep idle is one good tweak in saving battery while we close our eyes sleeping..
Click to expand...
Click to collapse
Ok, for one deep sleep is where phone should be when it is not used.
I always wanted to ask: whatever happened to this crazy idea of charging the phone when it is on some desk in the house for a few hours?
I am fairly certain you will find your phone is awake when you sleep, doing stuff it shouldn't be doing.
When it is just laying on the desk, a drain of 5-10% /hour means it is not in deep sleep, something on rom or apps is broken. deep idle would not fix that, deep idle may however help mask the real problem that keeps the phone from reaching deep sleep.
deep idle, the way you use it is like buying a can of flat fix for the car tire but leaving the object that still sticks out 2" beyond your tread in the tire, causing continued damage to the tire, it gets you by, but won't last forever and the guy who really fixes your flat will not smile at you once he sees the sticky inside of your wheel.

[Q] Better Battery Stats

I'm not really sure what most of the followings things are, but they are what shows up when i run betterbatterystats. For some reason my battery stats are always changing. One day I could get over a day on a full charge and others it could be 6-8 hours and mainly the same amount of use. I have noticed on the bad days that the partial wakelocks and kernel wakelocks are much higher. the problem is that I dont know what these services are and whether or not I can kill them, or even how to kill them. But here is my lists.
Phone running on full charge for 4hr39m.
Wifi on 4hr17m
Awake 1hr01m
Screen On 32min25s
Partial Wakelocks, only EmailEngineAPI is more than a min. at 10m47s
Kernel Wakelocks:
PowerManagerService 7m47s
svnet 5m27s
DPRAM 2m42s
radio-interface 2m33s
max8998-charger 1m43s
Ive read that PowerManagerService is the collection of all wakelocks so I guess that doesnt really count. I assume emailengine is just the push email (kinda sucks that its either push or never and you cant just have it auto refresh every hour or so). As for vbus, i read that that is when your phone is on the charger which makes no sense because my phone is never on a charger or connected through usb. I have a seperate wall charger that charges the batteries on its own so I never plug my phone in, when the battery dies, I just put in a fresh fully charged battery. The other wakelocks I couldnt find when I searched for them.
BTW I dropped down to 77% battery and as you can tell by my screen on time, I was only on the phone for 32m. So these damn wakelocks are stopping my phone from deep sleep (which btw is at 66% according to cpu spy) On good battery days the deep sleep is between 80-90%
If anyone knows anything about this stuff and can pass on some words of wisdom I'd appreciate it. Thanks.

Could be wifi causing the wakelock, this is a known issue with most roms, I'd try killing the wifi when you don't need it.
Either use a toggle widget or use something like juice defender.
Personally, I've got power control plus to manually kill GPS and wifi and then juice defender ultimate to automate data every couple of hours to synch apps. I've never had any wakelock issues using this setup.
CPU Spy:
1267 MHz: 8%
1075 MHz: 1%
384 MHz: 1%
245 MHz: 11%
Deep Sleep: 75%
Seems strange that you have such a large drain on some days and not others, anything stand out when the battery is draining faster (away from home for example, meaning your data will be on rather than wifi ?)

Does anyone know where I can find better battery stats apk or link for it. I've obviously been looking in the wrong threads.

http://forum.xda-developers.com/showthread.php?t=1179809

[Q] Is the CPU active during BLN Notification?

Quite curious as I am under the assumption that when the phone is in DEEP SLEEP, the CPU is powered down to conserve battery. However, if BLN is active with blink notification how is blinking controlled?
On a related note, does no blinking save or not save any battery life?
EDIT: Sorry, I meant DEEP SLEEP. DEEP IDLE is so frequently used on the forums I mistaked it in this post.

AeroEchelon said:
Quite curious as I am under the assumption that when the phone is in DEEP IDLE, the CPU is powered down to conserve battery. However, if BLN is active with blink notification how is blinking controlled?
On a related note, does no blinking save or not save any battery life?
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Click to collapse
first of all, i think you dont understand what deep idle is. deep idle is a very low power state where your cpu IS active. for example, its used when you are listening to music with your screen off. deep sleep is when your cpu is in a hibernating state, when your phone isnt active and the screen is off. deep sleep is the ideal state to save battery. but when your cpu is active, deep sleep isnt possible. the next step up is deep idle(not all kernels have this as it also is guilty of causing issues for some phones). when the soft keys are blinking, this does wake your phone from deep sleep.

simms22 said:
first of all, i think you dont understand what deep idle is. deep idle is a very low power state where your cpu IS active. for example, its used when you are listening to music with your screen off. deep sleep is when your cpu is in a hibernating state, when your phone isnt active and the screen is off. deep sleep is the ideal state to save battery. but when your cpu is active, deep sleep isnt possible. the next step up is deep idle(not all kernels have this as it also is guilty of causing issues for some phones). when the soft keys are blinking, this does wake your phone from deep sleep.
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Click to collapse
Ahh! That was my mistake. I definitely do know what DEEP IDLE is. I meant DEEP SLEEP. (I know it doesn't help when I put it in caps.) DEEP IDLE is an additional state introduced by Ezekeel as an intermediate state between DEEP SLEEP and IDLE. I understand.
Regarding my question, does that mean your phone is not in sleep while blinking is occuring? It seems like such a waste of battery.

AeroEchelon said:
Ahh! That was my mistake. I definitely do know what DEEP IDLE is. I meant DEEP SLEEP. (I know it doesn't help when I put it in caps.) DEEP IDLE is an additional state introduced by Ezekeel as an intermediate state between DEEP SLEEP and IDLE. I understand.
Regarding my question, does that mean your phone is not in sleep while blinking is occuring? It seems like such a waste of battery.
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Click to collapse
thats one reason i dont use it. the other is that i would rather check for notification on my time

simms22 said:
thats one reason i dont use it. the other is that i would rather check for notification on my time
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Click to collapse
Thanks simms22 for your quick response.
Actually on the topic of deep idle, it seems if the CPU was active to blink the LEDs, deep idle state seems like the perfect candidate.

AeroEchelon said:
Thanks simms22 for your quick response.
Actually on the topic of deep idle, it seems if the CPU was active to blink the LEDs, deep idle state seems like the perfect candidate.
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Click to collapse
it could very well be, but maybe not

Blinking keeps the phone awake (excessive battery drain, deep idle helps but it's not worth it still). If you keep it static and on, the phone will happily go into deep sleep (this is how i set mine up).
You can test this with CPU Spy if you like, these are my findings.

[Q] Can't figure out what's eating my tf700's battery?

Hi all,
My new tf700's battery is draining while sleeping.
I tried Don's airplane mode, unchecking Activate Wi-Fi while screen is off, checking disconnect Wi-Fi while screen is off, yet nothing works!
~5% drain per 7 hours.
The battery stats show that ~11% of the system resources go to waste because of "System Idle"...
This is despairing.
Please help.

Even a device that is sleeping consumes power. Personally, I do not think that about 5% per 7 hours is that bad -- is it? I would recommend installing BetterBatteryStats and then have a few charging cycles to see what's happening inside. (It may be an app that's going amok, and that may not be reproducible with a single run.) The standard Android battery report I do not trust.

5⅝ isn't that bad really. There are some extra power saving options and if rooted you can enable deep sleep.That'll give you 1% - 2% overnight.

What's your screen set to? IPs or IPS+?
Which CPU mode?
Is it very cold? Cold drains a battery faster.
sbdags said:
5⅝ isn't that bad really. There are some extra power saving options and if rooted you can enable deep sleep.That'll give you 1% - 2% overnight.
Click to expand...
Click to collapse
Don't need root for that, mine does 2% in 4 days if i leave it alone...

ShadowLea said:
What's your screen set to? IPs or IPS+?
Which CPU mode?
Is it very cold? Cold drains a battery faster.
Don't need root for that, mine does 2% in 4 days if i leave it alone...
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Click to collapse
IP (not IPS+).
Battery save cpu mode.
Normal Temperature (~20 celsius)

How can u enable deep sleep in root?