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[Q] Battery life on standby (NOT in airplane mode)

I seems like we have a discrepancy in how much battery life a TF uses in standby. Some folks seem to be burning <1%/hour, others >3%/hour. Obviously, this makes a huge difference in the total time a TF can be expected to last on a charge.
Please indicate how much yours burns per hour. Please ONLY answer if you run your TF as follows:
1. NOT in airplane mode
2. With wifi in the default (run in background) configuration

What setting is to run wifi in the background?
Also, would the number of apps (singned in) and thinks like exchange emails factor into this?

IIJBII said:
What setting is to run wifi in the background?
Also, would the number of apps (singned in) and thinks like exchange emails factor into this?
Click to expand...
Click to collapse
Yep, a lot of things could impact this. But, the dichotomy seems so clear-cut (literally, <1%/hour for some people vs. >3%/hour for others) that I don't think those things by themselves can account for the difference.

wynand32 said:
Yep, a lot of things could impact this. But, the dichotomy seems so clear-cut (literally, <1%/hour for some people vs. >3%/hour for others) that I don't think those things by themselves can account for the difference.
Click to expand...
Click to collapse
I understand and agree. There should be some type of baseline. can you explain what Wifi setting you mentioned above? I have 3 options - Sleep when screen is off, Never when plugged in and Never - I know thats not exactly how they read but its something like that.
Sent from my Transformer TF101 using Tapatalk

IIJBII said:
I understand and agree. There should be some type of baseline. can you explain what Wifi setting you mentioned above? I have 3 options - Sleep when screen is off, Never when plugged in and Never - I know thats not exactly how they read but its something like that.
Sent from my Transformer TF101 using Tapatalk
Click to expand...
Click to collapse
The default is to "Never" disconnect...

Dunno how many %/hour, but I've gotten from 14 hours to 17 hours.
Picked up the transformer once in a while, put it down, etc..
Here's a screenshot of the 14hr one, charged it at the end for a few minutes.

wynand32 said:
Yep, a lot of things could impact this. But, the dichotomy seems so clear-cut (literally, <1%/hour for some people vs. >3%/hour for others) that I don't think those things by themselves can account for the difference.
Click to expand...
Click to collapse
So you don't think the amount of data being communicated per application affects battery use in idle?
What do you think about signal strength from the WAP? (being further from the WiFi router, in another room, many walls and objects between the unit and the WAP)

FrayAdjacent said:
So you don't think the amount of data being communicated per application affects battery use in idle?
What do you think about signal strength from the WAP? (being further from the WiFi router, in another room, many walls and objects between the unit and the WAP)
Click to expand...
Click to collapse
I'm comparing my results to what I'm seeing on the Xoom, which is pretty much identically configured to my TF (same email accounts, same apps installed and running, used with the same routers, etc.). The Xoom uses well under 1%/hour on standby, the TF right around 3.5%/hour.

I'very configured my TF to turn WiFi off when sleeping.
Yesterday my TF was unplugged and unused for a full 24 hours for an 8% battery drain.
Regards,
Davw

The reason there will be discrepencies between peoples devices is because everyone installs different apps. It's these apps that drain the battery more/less, so install a battery monitoring app and check the logs every few days. If you're losing more than 1% on standby per hour, then get a task killer program and tasker, and set up schedules to turn off apps at times you dont need them. Also make sure you have actually set the battery app up properly, by changing the rating it thinks the battery is (to 6600mA) instead of any default value it has.

stuntdouble said:
The reason there will be discrepencies between peoples devices is because everyone installs different apps. It's these apps that drain the battery more/less, so install a battery monitoring app and check the logs every few days. If you're losing more than 1% on standby per hour, then get a task killer program and tasker, and set up schedules to turn off apps at times you dont need them. Also make sure you have actually set the battery app up properly, by changing the rating it thinks the battery is (to 6600mA) instead of any default value it has.
Click to expand...
Click to collapse
How would one change the battery to 6600ma instead of the default

dazz87 said:
How would one change the battery to 6600ma instead of the default
Click to expand...
Click to collapse
If you are using Battery Monitor Widget then it's from settings>monitoring preferences>battery capacity. Default was 1200mA on mine originally. If you're using some other app, I've no idea.

As an update, I decided to go ahead and do a factory restore, just for kicks. I'm not experiencing much closer standby performance to my Xoom, about 1%/hour or maybe a bit less. In four hours since the restore, I've lost 5% battery life, and that includes a bit of use.
It's possible that the battery just hasn't calibrated since the restore, and so I'll report back if things return to what they were before. At this point, though, I'm hopeful that something was corrupted or misconfigured, and that a factory restore did indeed resolve the issue.

stuntdouble said:
If you are using Battery Monitor Widget then it's from settings>monitoring preferences>battery capacity. Default was 1200mA on mine originally. If you're using some other app, I've no idea.
Click to expand...
Click to collapse
Coolthanks for the info will have to check out that app. Right now i am using battery indicator pro whicb does not have a option to change battery capacity

Another update after the factory reset: charged the TF to 100% and unplugged at midnight. At 8:00am this morning it was at 78%, so roughly 2.75%/hour discharge rate. At 10:00am (also only on standby) it was at 74%, so 2.6%/hour total for the 10 hours.
The Xoom was at 48% at 8:00am (forgot to note its battery life at midnight), and at 10:00am (also on standby) was at 47%. So, the Xoom on standby is burning .5%/hour, which has been my general experience with it.
Both the Xoom and the TF are configured with the same email accounts and settings, the same general configuration (wifi, etc.), and the same apps except for the Asus apps. Since my experience on standby was roughly the same with the original (non-updated) TF build, I don't think it's the Asus apps that are causing the burn.
If most others were experiencing the same thing, I'd write this off as a purely academic exercise. 2.5%/hour burn rate on standby isn't terrible, particularly since I tend to charge every night anyways. My concern, though, is that if others are getting <1%/hour with the same basic settings, and as I'm getting on the Xoom for sure, then the question becomes: is there something wrong with my TF specifically?

Well my transformer is doing better than that. I lost only 3 over 5 hours. Overnight from 10 to 10 battery went from 33 to 27 percent so looking at 0.6 % per hour. Btw I have wifi set to turn off with screen off. Why do I need wifi going if I can't see the screen. For mail when would wake the device it checks the accounts immediately. So........
Sent from my Transformer TF101 using Tapatalk

I've had my TF with me most of the day letting friends play around with it so it's had what I would consider "normal" use.
Starting at 100% this morning when I left and now has 65% after ~8 hours. (See attached screenshot)

I am battery anal too but anyone else feel like discussing a 2% drain difference in idle is kind of ridiculous.. no one runs exactly the same stuff on their devices of course it will be different... to be honest if you are concered about battery drain during idle.. you obviously leave your device unused alot... in which case battery life doesn't matter a great deal cuz you aren't using it hahhha
Sent from my MB860 using XDA App

nsstrunks said:
I've had my TF with me most of the day letting friends play around with it so it's had what I would consider "normal" use.
Starting at 100% this morning when I left and now has 65% after ~8 hours. (See attached screenshot)
Click to expand...
Click to collapse
How did you get battery stats. To work?
Sent from my Transformer TF101 using Tapatalk

Kaoe said:
I am battery anal too but anyone else feel like discussing a 2% drain difference in idle is kind of ridiculous.. no one runs exactly the same stuff on their devices of course it will be different... to be honest if you are concered about battery drain during idle.. you obviously leave your device unused alot... in which case battery life doesn't matter a great deal cuz you aren't using it hahhha
Sent from my MB860 using XDA App
Click to expand...
Click to collapse
Disagree with you. I think standby life is very important because the tablet is something you wanna pickup and have immediate access to for information a nd media without always Worrying if the battery's has enough juice. My nook color can go several days on stby and 3 to 4 days of casual use with standby. This tab doing same stuff is giving me 36 hours tops.
Cm7 on nook color has sleep issues and so doesn't enter deep sleep and so battery drain is about 2% instead of. 2% per hour on stock nook.
maybe our devices aren't sleeping deeply and draining much faster.
Something a Dev. can check?
Sent from my Transformer TF101 using Tapatalk

Terrible battery life after 3.2.1 update.

Hello All,
does anybody noticed the increased power consumption after the last official update (3.2.1)? Below is my battery chart after just one day. The most interesting part is when I didn't used tablet in last couple of hours, as you can see no WiFi, screen, pad not awaken and... battery draining as hell. On detailed battery usage screen Android OS was on the top with 38% then WiFi 15% and screen 12%
Before update battery life was ok (My TF is early hardware, stock OS, no root etc.). After update I didn't changed anything, same configuration, no new software, updates etc. Just rebooting two times because tried to get rid of another 3.2.1 bug aka "mobile browser"
I appreciate that Asus is quick to pushing updates to TF, but this time they did it too fast.
Does anyone have a similar problem, or is it just my update went wrong?

I get 7 hrs of hardcore usage, as for a day odds of charge, lucky u, how long where u getting before cause im impressed ;-)
Sent from my Transformer TF101 using Tapatalk

will8578 said:
I get 7 hrs of hardcore usage, as for a day odds of charge, lucky u, how long where u getting before cause im impressed ;-)
Sent from my Transformer TF101 using Tapatalk
Click to expand...
Click to collapse
Look again, he was not using it
Sent from my Transformer TF101 using xda premium

Yeah really impressive, battery from 40% to 0 in just 16 hours of doing nothing .
But to satisfy your curiosity, I had around 7-8 hours of continuous use with WiFi and screen on.

lol sorry for not reading properly, i only got my eeepad on sun and updated straight away to 321, so its all i know at the mo, iv also got a b70 so im patiently waiting for root,
Sent from my HTC Desire using XDA App

You are going to want to charge your battery to 100 and use the battery calibration app in the market...called battery callibration. Do the instructions it tells you.
You might want to install CPU spy and see what is running in the background to drain your battery like that.
n
Sent from my Transformer TF101 using xda premium

This is a real bug. Here's a screenshot I just took from my tablet. Tell me you don't see something strange with Android OS taking up 26% of the power.
That's 83% battery life left over 4 hours of me using it for about 30 minutes total.

You may want to observe the non-sleeping time using "cpuspy" from Markets. Quite revealing...

boonkui said:
You may want to observe the non-sleeping time using "cpuspy" from Markets. Quite revealing...
Click to expand...
Click to collapse
Can you see the actual apps or processes running with cpuspy? All I can see is a horizontal bar graph with percentages of different frequencies

ThEiiNoCeNT said:
You are going to want to charge your battery to 100 and use the battery calibration app in the market...called battery callibration. Do the instructions it tells you.
You might want to install CPU spy and see what is running in the background to drain your battery like that.
n
Sent from my Transformer TF101 using xda premium
Click to expand...
Click to collapse
i thought that app only worked on rooted devices?

fldude99 said:
Can you see the actual apps or processes running with cpuspy? All I can see is a horizontal bar graph with percentages of different frequencies
Click to expand...
Click to collapse
You are right. No apps shown. But it shows a bar indicating the duration the cpu spent in deep sleep - this is useful for me.
Sent from my Dell Streak using xda premium

Right...that's part of the problem with the new firmware..it never goes into a deep sleep. Not sure if it did previously, but the battery life since 3.2.1 is definitely bad

indeed i've seen a noticeable drop in the battery as well and was beginning to worry. hopefully someone comes up with a solution

I have no issues with battery drain after updating.
Did you double check that GPS didn't get enabled? Have you tried a factory reset after updating? Yeah, I know it's a pain in the ass, but it's not so difficult to get everything running again after hard resetting.
Regards.

Hi, I've noticed the same battery drain since the update , just bought the keyboard and was enjoying the added battery life ,but last night the pad and keyboard drained flat in seven hours while it was meant to be sleeping like me. It seems looking at the battery info that the wifi and system never shut down and does'nt even when charging :-(
Sent from my Transformer TF101 using xda premium

@CalvinH ,
Good points to check, but I was wondering if you are using the keyboard ,and that is perhaps why some people are not having issues,could it be a keyboard bug again. I will try without and see if there is any difference.
Sent from my Transformer TF101 using xda premium

Battery life has not been as good and also when playing music with google music it freezes sometimes and reboots wtf asus

I am getting random reboots as well, after 3.2.1 update. Twice now while the tablet was just sitting there on the table, suddenly the ASUS boot logo pops up.
I have always had problems with ActivityManager killing background tasks a little too aggressively, and so I wondered if it was killing things it shouldn't, now and then. (It does occasionally kill the wifi supplicant process, which should never happen.) But the reboots never happened before the latest update.

My battery life is significantly worse since the update. Before, in 12 hours of sitting idle, it would go through about 20% of battery. Today, it went through 70% in 13 hours of idle.

Wow sorry to hear that guys. For once mine has good battery life again! It was good, then after the last few updates it was reaaallly bad. Now it can go days, but it seemed like it got better right before the update?! Either way its better now.
Sent from my ADR6350 using Tapatalk

[Q] Any fix for excess wifi drain yet?

Hi guys, i think the title is self explainatory. According to battery stats my wifi uses 86% of my battery while my screen only uses 7%. Ive also read that a lot of people have the same issue. Has any fix come up lately that corrects this?

I think just the battery stats are displaying that wrong.
For me it showed that too but when my tablet was on standby with wifi on it barely drained any battery (~0,1 %/ hour).
I am now on jb (cm10 alpha) and wifi doesnt evenshow up any more on battery stats any more.
Sent from my Transformer Pad TF700T using xda app-developers app

Well I'm sure its killing my battery. When wifi isn't on and im watching video's or playing games, battery drain is great, roughly about1% every 5 minutes. When wifi is on, it loses roughly 5% every 5 minutes. A very noticeable change

djleez82 said:
Well I'm sure its killing my battery. When wifi isn't on and im watching video's or playing games, battery drain is great, roughly about1% every 5 minutes. When wifi is on, it loses roughly 5% every 5 minutes. A very noticeable change
Click to expand...
Click to collapse
So, with wifi on, you go dead in 100 minutes?
If that's the case, there is definitely something wrong with your pad. I've always got my wifi on, and unplug it in the morning. By the evening when I plug back in I am rarely under 15%.

Bigred007 said:
So, with wifi on, you go dead in 100 minutes?
If that's the case, there is definitely something wrong with your pad. I've always got my wifi on, and unplug it in the morning. By the evening when I plug back in I am rarely under 15%.
Click to expand...
Click to collapse
um... yea you might want to do you math again there buddy...
Sent from my ASUS Transformer Pad TF700T

pierrekid said:
um... yea you might want to do you math again there buddy...
Sent from my ASUS Transformer Pad TF700T
Click to expand...
Click to collapse
Who, me?

Bigred007 said:
Who, me?
Click to expand...
Click to collapse
lol yea you, do you know how long it takes a tf700 to die it goes down at 1% every 5 minutes?
Sent from my ASUS Transformer Pad TF700T

pierrekid said:
lol yea you, do you know how long it takes a tf700 to die it goes down at 1% every 5 minutes?
Sent from my ASUS Transformer Pad TF700T
Click to expand...
Click to collapse
You may want to read more carefully before busting someone's balls...
He said that with wifi on, it goes down 5% every 5 minutes.
5%/5 minutes = 1%/1 minute = 100%/ 100 minutes.

djleez82 said:
Well I'm sure its killing my battery. When wifi isn't on and im watching video's or playing games, battery drain is great, roughly about1% every 5 minutes. When wifi is on, it loses roughly 5% every 5 minutes. A very noticeable change
Click to expand...
Click to collapse
Bigred007 said:
So, with wifi on, you go dead in 100 minutes?
If that's the case, there is definitely something wrong with your pad. I've always got my wifi on, and unplug it in the morning. By the evening when I plug back in I am rarely under 15%.
Click to expand...
Click to collapse
well according to this quote moron your math is wrong. You might want to read what you write before you post
Sent from my ASUS Transformer Pad TF700T

pierrekid said:
well according to this quote moron your math is wrong. You might want to read what you write before you post
Sent from my ASUS Transformer Pad TF700T
Click to expand...
Click to collapse
Principal: Mr. Madison, what you've just said is one of the most insanely idiotic things I have ever heard. At no point in your rambling, incoherent response were you even close to anything that could be considered a rational thought. Everyone in this room is now dumber for having listened to it. I award you no points, and may God have mercy on your soul.
Billy Madison: Okay, a simple "wrong" would've done just fine.

From what I can tell, the battery screen isn't displaying the actual drainage, but in fact shows the distribution of the drainage over the running processes.
(Because there is no way my screen is draining 54% of my actual battery charge whilst set to power saving 10% brightness... which it has been on for 38 hours so far, and it's still on 90%.)
WiFi 99% doesn't mean it's draining a whole lot of your battery in one go. It just means that, out of all the prcesses currently using battery, the WiFi uses 99% of the totally used battery. This may still be 2% in half an hour (I'm not quite certain on the rates), but of that 2%, 99% is the WiFi.
Doesn't mean the thing isn't completely silly. Mine right now says "Screen 54, Idle 23, Media 11, Mxplayer 9, System 3, Os 2" Which, unless both my brain and my calculator are wrong, is 102%....

"Hypermiler" (Battery Life) Tips

This is a little bit of a boast, I guess you could say... but also educational in a way.
This is my most recent battery life. I found that when I posted my screenshots, people think they are faked in some way. (Posted it here and other GS3 forums) They are not. I am using the stock battery my phone came with. NOT an extended battery. And you can see from the battery graph that the phone was not charged. I guess this is to show that you can use your phone heavily, and still get amazing battery life.
I am using the stock jellybean leak. Not rooted or unlocked.
This is everything I have done to get good battery life.
-I turned the LED touch lights off (I don't like them, they're so bright)
-I have all vibrations off. My phone does not ever vibrate.
-I have power save on.
-I have S-Voice "wake command" off.
-I have motion control disabled.
-I am almost always on wifi (work & home)
-When I am on wifi, I turn mobile data off.
-When I am going to bed, I put my phone in airplane mode.
-I rely heavily on the task manager, I clear my open windows and under the "RAM" tab I clear memory. Probably once an hour.
-I have my sync OFF. I check my email manually.
-Auto brightness.
-I never partially charge. I let my battery go all the way down to 1% then I charge it to 100%. Always.
-Always have a dark background, if possible.
Thats everything. Mind you, I didn't make or receive any phone calls on this cycle. But I did use my phone, as you can see I didn't just let it sit around. Device idle was like 3%?
Anyone else a "hypermiler" like me? I don't get this much screen time every time, it ranges from 5-7. I've gotten more than this and I've gotten less.
Hope this can help even if it's only a little.
Sent from my SCH-I535 using xda app-developers app

josh995 said:
-I rely heavily on the task manager, I clear my open windows and under the "RAM" tab I clear memory. Probably once an hour.
-Auto brightness.
-I never partially charge. I let my battery go all the way down to 1% then I charge it to 100%. Always.
Sent from my SCH-I535 using xda app-developers app
Click to expand...
Click to collapse
-Clearing the ram too much actually drains the battery more because certain apps will have to auto start again every time you clear memory
-Keeping it at around 0-30% all the time should save you more.(I can still see my screen during the day at 30%)
-That doesn't do anything.

josh995 said:
-When I am going to bed, I put my phone in airplane mode.
-I rely heavily on the task manager, I clear my open windows and under the "RAM" tab I clear memory. Probably once an hour.
-Auto brightness.
-I never partially charge. I let my battery go all the way down to 1% then I charge it to 100%. Always.
Click to expand...
Click to collapse
-Are there no A/C outlets in your bedroom?
-What the previous guy said, this is a stupid thing to do. Java was designed around efficient use of resources, and restarting running apps (which would happen, unless you have them removed entirely) would use more processing power than you had saved by not having the tasks running in the first place.
-Using Auto is causing the system to periodically poll the light sensor, draining more battery than used otherwise.
-This is how you kill Li-Ion batteries (one way, at least). The whole spiel about discharging fully, THEN charging fully or the battery will have some sort of "memory" of capacity less than actual capacity is how Ni-Cad rechargables work, not Li-Ions. Li-Ion batteries are the opposite. For superior life, keep them topped up as much as possible. FYI
I hope THIS helped, more than a little.

There are plenty of outlets in my room. Lol I just don't need to use them that often as you can see also I hate getting calls and messages in the middle of the night but I use my phone as an alarm sometimes so airplane mode just seems convenient.
This is just what I do. I mean, some of the things I do may not help at all. But this is what I do with Android phones and I've always gotten really good battery life. I've always, always gone down to 1% then charged up to 100% and I've never had a battery go bad on me. Then again I only ever keep a phone for 1 year. I do know that these batteries don't have the memory problem, I just can't bring myself to not fully discharge or charge. I have mild OCD, for real. Little things like that brother me
I'll play with backlighting to see what that does for me.
I've gotta be doing something right. Idk about the task manager, I've just always liked not having programs running if I don't need them to be. I know they arent "running" but it just gives me peace of mind, I guess.
Thanks for the recommendations I will try them.
Sent from my SCH-I535 using xda app-developers app

josh995 said:
There are plenty of outlets in my room. Lol I just don't need to use them that often as you can see also I hate getting calls and messages in the middle of the night but I use my phone as an alarm sometimes so airplane mode just seems convenient.
This is just what I do. I mean, some of the things I do may not help at all. But this is what I do with Android phones and I've always gotten really good battery life. I've always, always gone down to 1% then charged up to 100% and I've never had a battery go bad on me. Then again I only ever keep a phone for 1 year.
I'll play with backlighting to see what that does for me.
I've gotta be doing something right. Idk about the task manager, I've just always liked not having programs running if I don't need them to be. I know they arent "running" but it just gives me peace of mind, I guess.
Thanks for the recommendations I will try them.
Sent from my SCH-I535 using xda app-developers app
Click to expand...
Click to collapse
You getting really good battery life =/= you getting the best battery life possible.
I have pushed ~2 days of battery life without charging many times on my GS3 (with all the bells and whistles running, just mobile data turned off when i'm not commuting), i just don't have a reliable measurement because:
1. I'm flashing mods/roms/kernels/whatever multiple times per week, and
2. I usually charge my phone when it's convenient, which is fairly often.

charlieg90 said:
You getting really good battery life =/= you getting the best battery life possible.
I have pushed ~2 days of battery life without charging many times on my GS3 (with all the bells and whistles running, just mobile data turned off when i'm not commuting), i just don't have a reliable measurement because:
1. I'm flashing mods/roms/kernels/whatever multiple times per week, and
2. I usually charge my phone when it's convenient, which is fairly often.
Click to expand...
Click to collapse
I stopped flashing because of my OCD. I mean, I'm not crazy but it causes perfection issues and all the ROMs I was flashing had glitches here and there and Idk if you've known anyone with OCD but with the perfection issue, those glitches were all I could think about. So there went flashing. Lol.
Also comes into play with the charging thing. You seem knowledgeable in what you said but even though you said keeping it topped up is best, in my mind, that's destroying my battery. Lol. I really do appreciate your info though.
Sent from my SCH-I535 using xda app-developers app

josh995 said:
my OCD
Click to expand...
Click to collapse
I'm glad you said it, so that I didn't have to. :silly:
I read your post and the first thing that came to mind was, "there is medication for that, you know.":laugh:

Here's my .02. My battery never lasts that long. Not even close. I'd feel disappointed if it did. I bought my gsiii with the intent of gobbling up unlimited data and using the oc'd processor to run apps till the phone is so hot I have to set it down. I've burned up almost 6gigs of data since the 7th. I get around 4 hours of screen on time most generally. I also throw it on a charger whenever I have the chance. My battery rarely dips below 50%. Like others have said, full discharge cycles are for ni-cad batteries. Li-ion doesn't benefit. Good battery life for me is the lg flip phone we have on a diff line that lasts a couple weeks.
Sent from my SCH-I535 using Xparent ICS Tapatalk 2

josh995 said:
I stopped flashing because of my OCD. I mean, I'm not crazy but it causes perfection issues and all the ROMs I was flashing had glitches here and there and Idk if you've known anyone with OCD but with the perfection issue, those glitches were all I could think about. So there went flashing. Lol.
Also comes into play with the charging thing. You seem knowledgeable in what you said but even though you said keeping it topped up is best, in my mind, that's destroying my battery. Lol. I really do appreciate your info though.
Sent from my SCH-I535 using xda app-developers app
Click to expand...
Click to collapse
Okay, okay, as long as you admit it... I'll stop being a snarky jerk. I'm totally the same way though. Perfectionist to the core.

It's a very bad idea to let the battery go down to 1% regularly, lithium batteries should be charged more often for better life and more cycles

Sorry but I still just don't believe 7 hours of screen on time. 4 is above average even amazing screen on time for this phone and stock battery. I suppose there is the possibility of using 0 percent brightness, or even lux brightness or something similar to get the brightness even lower.
You said you use auto brightness, I'm sorry I just don't buy it.
People with the extended batteries are getting 7 hours of screen on time not stock batteries.
7 hours of screen on time is literally double almost every other phone on the market with stock batteries. I really fail to see how having minimum usage and a high performing rom will get you double screen on time.
Edit: with that said, in my current situation I will never have wifi access plus I tether a lot so I really have yet to personally see screen on time since I rooted. Before root and stock I got about 3.5 of screen on time.
Not trying to be a douche or anything just very curious about how 7 hours comes about.
Sent from my SCH-I535 using Tapatalk 2

bond32 said:
Sorry but I still just don't believe 7 hours of screen on time. 4 is above average even amazing screen on time for this phone and stock battery. I suppose there is the possibility of using 0 percent brightness, or even lux brightness or something similar to get the brightness even lower.
You said you use auto brightness, I'm sorry I just don't buy it.
People with the extended batteries are getting 7 hours of screen on time not stock batteries.
7 hours of screen on time is literally double almost every other phone on the market with stock batteries. I really fail to see how having minimum usage and a high performing rom will get you double screen on time.
Edit: with that said, in my current situation I will never have wifi access plus I tether a lot so I really have yet to personally see screen on time since I rooted. Before root and stock I got about 3.5 of screen on time.
Not trying to be a douche or anything just very curious about how 7 hours comes about.
Sent from my SCH-I535 using Tapatalk 2
Click to expand...
Click to collapse
you dont get 7 hours because you are not doing what op did for perfection, and you just like other "4 hour" guys in this thread. I can confirm 7 hours usage is totally possible and what left can support one day idle time when you turn off data etc. Iusually dont do that because I like my phone work at full functionality, but I also like tinkering around to keep maximum use of juice, by eliminating wake locks and autostart.
killing background helps sometimes because some stupid apps keeping using cpu after backgrounded. op go and get a iphone, its perfect for OCD since it can get zero unwanted background activity, amazing idle time and stable usage with relatively easier configuration and tweaking.
1% is NO. 1 battery killer, heat is NO. 2, top up at 100% is NO. 3. Li based battery is at best 40%. but plaese its just a phone, charge and use anytime you want. phone outdated way earlier than battery.
Sent from my SCH-I535 using Tapatalk 2

generalmilk said:
you dont get 7 hours because you are not doing what op did for perfection, and you just like other "4 hour" guys in this thread. I can confirm 7 hours usage is totally possible and what left can support one day idle time when you turn off data etc. Iusually dont do that because I like my phone work at full functionality, but I also like tinkering around to keep maximum use of juice, by eliminating wake locks and autostart.
killing background helps sometimes because some stupid apps keeping using cpu after backgrounded. op go and get a iphone, its perfect for OCD since it can get zero unwanted background activity, amazing idle time and stable usage with relatively easier configuration and tweaking.
1% is NO. 1 battery killer, heat is NO. 2, top up at 100% is NO. 3. Li based battery is at best 40%. but plaese its just a phone, charge and use anytime you want. phone outdated way earlier than battery.
Sent from my SCH-I535 using Tapatalk 2
Click to expand...
Click to collapse
While I understand what you're saying I think you misread my post. I was strickly referring to the screen on time which 7 hours of screen on time with stock battery is inconceivable. 4 is about the most you would normally see.
7 hours of USAGE is common.
Sent from my A500 using Tapatalk 2

Well I mean. You don't have to believe me. I mean I have nothing to offer but my word. I do use auto brightness. But because of the suggestion I'll probably set it to manual and see what that does.
I got 7 hours screen on time with the stock battery. The battery says "3.8 v li-ion battery"
I've gotten more than this is the past but I've also gotten less.
Like I said you don't have to believe me but... I'm using the stock battery.
And to the poster who mentioned to get an iPhone - I have one for my business line
Sent from my SCH-I535 using xda app-developers app

battery statistics are poor statistics in general. there are too many variables. luckily we have removeable batteries if we need mroe juice.
heres some postings to add to the mix
put my phone through the paces with fantasy football.
held up pretty well. stock battery mind you. on pace for nearly 8 hrs of on screen time. This isnt with typical use though... With typical use I can get 20hrs and 5-6 hrs of screen time. I thought anywhere from 4-6 hours of on screen time was what people were suppposed to be getting.

Yeah we all use our phone differently. I rarely actually talk on the phone with my GS3 because I use my iPhone for that. But everything else I do on my GS3, reading news, some browsing, xda.
I just thought I'd share what I do for people that may want to get better battery life.
Sent from my SCH-I535 using xda app-developers app

bond32 said:
While I understand what you're saying I think you misread my post. I was strickly referring to the screen on time which 7 hours of screen on time with stock battery is inconceivable. 4 is about the most you would normally see.
7 hours of USAGE is common.
Sent from my A500 using Tapatalk 2
Click to expand...
Click to collapse
Then I shouldn't use the word "usage". I meant 7 hours screen on time. Sometimes I got 8 or more, but only use it continuously after charging, no idle time.
---------- Post added at 12:10 PM ---------- Previous post was at 11:58 AM ----------
josh995 said:
Yeah we all use our phone differently. I rarely actually talk on the phone with my GS3 because I use my iPhone for that. But everything else I do on my GS3, reading news, some browsing, xda.
I just thought I'd share what I do for people that may want to get better battery life.
Sent from my SCH-I535 using xda app-developers app
Click to expand...
Click to collapse
Yet that involves turning off data. IMO the smartphone should always stay online. In my experience, iPhone can get constant -4 ~ -5ma juice flow during idle even with data (2G) and all the push notifications on, which are the only things I want for stay online. I feel its hard to get similar result on my GS3 though.

generalmilk said:
Yet that involves turning off data. IMO the smartphone should always stay online. In my experience, iPhone can get constant -4 ~ -5ma juice flow during idle even with data (2G) and all the push notifications on, which are the only things I want for stay online. I feel its hard to get similar result on my GS3 though.
Click to expand...
Click to collapse
I'm always online, whether it's wi-fi or 4G. Luckily I have wi-fi at home and at work.
Like, literally as I'm walking out the door of my house, I turn on my mobile data, and when I get to work I turn it off. When I'm leaving work I turn mobile data back on and when I get home I turn it off.

josh995 said:
I'm always online, whether it's wi-fi or 4G. Luckily I have wi-fi at home and at work.
Like, literally as I'm walking out the door of my house, I turn on my mobile data, and when I get to work I turn it off. When I'm leaving work I turn mobile data back on and when I get home I turn it off.
Click to expand...
Click to collapse
what you did is pointless. If you leave data on, data is not connected when wifi is connected, and it will connect automatically when no wifi connection.

generalmilk said:
what you did is pointless. If you leave data on, data is not connected when wifi is connected, and it will connect automatically when no wifi connection.
Click to expand...
Click to collapse
It's not pointless to me. As I said a few posts before... I have OCD, obsessive compulsive disorder. Things like this affect me. I know that being connected to Wi-Fi that data is not connected, but in my brain, it's as if something is telling me that because my data toggle is on, it's running.
I really can't help it.
Sent from my SCH-I535 using xda app-developers app

[Q] Dock Draining battery

Both running stock or CleanROM I have the issue that when I leave the tablet undocked my battery will last days or weeks with the screen off. When I connect the dock and turn off the screen the dock battery will drain to 0% within a couple days and the tablet battery level would be lower than if I had left it undocked.
I've installed better battery stats and deep sleep batter saver and the device is verified in deep sleep 90% of the time.
Any suggestions?

Think that is how it designed to work. Dock will keep trying to top up the tab when it drops below 70% and then when the dock battery runs out it requires extra juice from the tab to keep it alive.

sbdags said:
Think that is how it designed to work. Dock will keep trying to top up the tab when it drops below 70% and then when the dock battery runs out it requires extra juice from the tab to keep it alive.
Click to expand...
Click to collapse
I think my question may have not been clear. One should assume that the addition of a second battery should increase the overall runtime of the device not decrease it. Instead of getting the extra hours of battery life I am getting less battery life with the dock attached.

Same problem
I have the exact same problem. Ive got all the right apps and settings suggested from XDA and still my battery drains when doc is connected.

madhits45 said:
I have the exact same problem. Ive got all the right apps and settings suggested from XDA and still my battery drains when doc is connected.
Click to expand...
Click to collapse
Same problem since the 4.2 update...

WoozyBE said:
Same problem since the 4.2 update...
Click to expand...
Click to collapse
Ditto, same here.

I'm starting to think this is a common problem, and not just some random one that I was having...
So I installed better battery stats and it is indeed the dock that's draining both it's own battery as well as the infinity's battery. I think I had about 4 hours of asusdec_wake lock coming from the dock when I let it go to sleep, but the strange thing is it only appears to happen after about half an hour of sleep before it kicks in for me (I should point out btw that I'm using a tf201 dock and running cromi-x 4.4 with _that's kernel). After removing the dock from my infinity, I no longer got the battery drain from my tab, but when my tab was docked, the keyboard seemed to drain like crazy along with the infinity, but only after being asleep for about half an hour to an hour. I suppose this is just a 4.2 bug that ASUS might be able to release an update on, or sbdags, as it seems he's done a better job with bug fixes than ASUS has. :laugh:

Paulitics said:
I'm starting to think this is a common problem, and not just some random one that I was having...
So I installed better battery stats and it is indeed the dock that's draining both it's own battery as well as the infinity's battery. I think I had about 4 hours of asusdec_wake lock coming from the dock when I let it go to sleep, but the strange thing is it only appears to happen after about half an hour of sleep before it kicks in for me (I should point out btw that I'm using a tf201 dock and running cromi-x 4.4 with _that's kernel). After removing the dock from my infinity, I no longer got the battery drain from my tab, but when my tab was docked, the keyboard seemed to drain like crazy along with the infinity, but only after being asleep for about half an hour to an hour. I suppose this is just a 4.2 bug that ASUS might be able to release an update on, or sbdags, as it seems he's done a better job with bug fixes than ASUS has. :laugh:
Click to expand...
Click to collapse
Is sbdags a custom rom? I'm assuming so. Also your use of the tf200 dock should make no difference. Its been proven besides a firmware change and a slight color change the 2 docs are pretty much the same. I also believe this maybe a 4.2 issue however I have seen this before the latest update with my doc. It does appear to kick in after about 30 mins to an hour for me also. I am trying out a new app that I hope will help called DS battery saver. Ive tried others before to no avail but I figured why not give this one a try. I keep my infinity on the doc all the time so I hope they can fix this issue...

madhits45 said:
Is sbdags a custom rom? I'm assuming so. Also your use of the tf200 dock should make no difference. Its been proven besides a firmware change and a slight color change the 2 docs are pretty much the same. I also believe this maybe a 4.2 issue however I have seen this before the latest update with my doc. It does appear to kick in after about 30 mins to an hour for me also. I am trying out a new app that I hope will help called DS battery saver. Ive tried others before to no avail but I figured why not give this one a try. I keep my infinity on the doc all the time so I hope they can fix this issue...
Click to expand...
Click to collapse
sbdags is the creator of the awesome custom rom, clean rom inheritance xenogenisis, he's also the second poster in this thread. I'm currently running his 4.4 rom and it's incredible! (Thank you @sbdags btw for the amazing rom, you'll get a kind donation once I can get this internship thing figured out :highfive I kind of figured that having a 201 dock wouldn't make a difference, but I just thought I should mention it. As for the draining of the battery, I think we can just assume it's a 4.2.1 bug that can hopefully be patched by ASUS or by one of the awesome developers. I've also tried DS battery saver, and I think it told me the culprit was screen on, but after installing better battery stats, I got a recurring wake lock from the asusdec_lock. Oh well, it's not the worst thing ever right now to just undock the tablet, or remember to shut it off while docked.

Paulitics said:
sbdags is the creator of the awesome custom rom, clean rom inheritance xenogenisis, he's also the second poster in this thread. I'm currently running his 4.4 rom and it's incredible! (Thank you @sbdags btw for the amazing rom, you'll get a kind donation once I can get this internship thing figured out :highfive I kind of figured that having a 201 dock wouldn't make a difference, but I just thought I should mention it. As for the draining of the battery, I think we can just assume it's a 4.2.1 bug that can hopefully be patched by ASUS or by one of the awesome developers. I've also tried DS battery saver, and I think it told me the culprit was screen on, but after installing better battery stats, I got a recurring wake lock from the asusdec_lock. Oh well, it's not the worst thing ever right now to just undock the tablet, or remember to shut it off while docked.
Click to expand...
Click to collapse
I'm not so sure i want to try custom roms yet. I hate not knowing if its the rom or my tablet when trouble arises. I wonder what it could be in his rom that makes this issue go away or does it not? Was not sure if you were saying it cleared the problem up or not.
I have better battery stats & its telling me asusdec_wake was on for 11h 50min. Not sure what that is, assuming it woke the tablet up. Sounds similar to yours though. I do know the google services was what always shows in the battery stat app by asus. I hate to undock as it involves removing my whole case which protects both doc & tablet.

madhits45 said:
I'm not so sure i want to try custom roms yet. I hate not knowing if its the rom or my tablet when trouble arises. I wonder what it could be in his rom that makes this issue go away or does it not? Was not sure if you were saying it cleared the problem up or not.
I have better battery stats and so far it has only reported no stats, so not sure what is draining my tablet. I do know the google services was what always shows in the battery stat app by asus. I hate to undock as it involes removing my whole case.
Click to expand...
Click to collapse
Oop, yeah, sorry, I probably should have made that clear that the problem is still present in Clean Rom Xenogenesis 4.4 and most likely with Stock Asus 4.2.1, so flashing a custom Rom won't do anything to solve it to my knowledge, so I wouldn't worry about that. In order for better battery stats to do it's stuff, you need to set it to "since last boot" and then just restart the tablet. At least, that's what I did to make it work. After that, better battery stats will start collecting data about what's waking up your tablet from sleeps, but it's still kind of hard to pinpoint what app is causing the issue.
What we know for sure is that it's something to do with Android 4.2.1 and being connected to the dock while the tablet sleeping is causing it to drain both the batteries of the dock and the tablet, but this doesn't occur when it's disconnected from the dock, and the tablet sleeps just fine. Also not really sure if this is relevant, but when I had my tab sleeping, it went into deep sleep, but after about half an hour of deep sleep, it had that asusdec_wake lock and then it bumped up to I believe 510 mhz for the rest of it's sleeping time. So, maybe it's a stock kernel thing?

Here's what I think is happening.
Asus don't allow deep sleep whilst the device is charging. When using the dock the device thinks is it is charging so doesn't deep sleep. The devices keeps waking, drawing charge from the dock which eventually runs down.

sbdags said:
Here's what I think is happening.
Asus don't allow deep sleep whilst the device is charging. When using the dock the device thinks is it is charging so doesn't deep sleep. The devices keeps waking, drawing charge from the dock which eventually runs down.
Click to expand...
Click to collapse
That could be a reason, I'm just confused as to why ASUS would add this, as I never had this problem in 4.1, but after 4.2 it's happened every time I had my tablet in the dock and let it sleep for long periods of time, and it's not cromi 4.4 as it appears to be the case with stock as well. Also, not only the dock drains, but the tablet drains too, but it's only when docked. When I'm not docked, I go about 1% per hour drain, but when I am docked, I'll go about 10 - 15% drain. Oh Asus, you crazy!

Could this be related to the option to wake-up by pressing a key on the dock, by any chance? I could just be spouting rubbish (which wouldn't be a first), but it seems to me that such a setting would require some kind of wake process.
Do you have it enabled?
I vaguely recall there being a similar issue with a fairly similar-named process a while back. I think it was the wakeup setting back then, but it could also have been Maps and Location Services.
Send From My Samsung Galaxy S3 Using Tapatalk 2

ShadowLea said:
Could this be related to the option to wake-up by pressing a key on the dock, by any chance? I could just be spouting rubbish (which wouldn't be a first), but it seems to me that such a setting would require some kind of wake process.
Do you have it enabled?
I vaguely recall there being a similar issue with a fairly similar-named process a while back. I think it was the wakeup setting back then, but it could also have been Maps and Location Services.
Send From My Samsung Galaxy S3 Using Tapatalk 2
Click to expand...
Click to collapse
I froze maps and turned off all location access and turned off all wireless functions (location, bluetooth, wireless, etc.) from my tab and it still occurs. It's possible that it could be the asus power saving thing for the dock which is the only real thing I have enabled for the dock, but I'm away from my tab at the moment, so I can't exactly test this theory yet.

sbdags said:
Here's what I think is happening.
Asus don't allow deep sleep whilst the device is charging. When using the dock the device thinks is it is charging so doesn't deep sleep. The devices keeps waking, drawing charge from the dock which eventually runs down.
Click to expand...
Click to collapse
Any idea how to fix?

Paulitics said:
... It's possible that it could be the asus power saving thing for the dock which is the only real thing I have enabled for the dock, but I'm away from my tab at the moment, so I can't exactly test this theory yet.
Click to expand...
Click to collapse
Based on my observation mentioned option has no infuence on dock draining problem.

Confirmed Dock Drain
The battery drain is happening to me as well. I couldn't figure out why the stupid thing kept going dead.
Not happy! It's just another problem with this tablet. I wanna like it, but it's one thing after another!
-- ok, venting over --
Anyone find a solution yet? Downgrade the OS?

ryanbadowski said:
The battery drain is happening to me as well. I couldn't figure out why the stupid thing kept going dead.
Not happy! It's just another problem with this tablet. I wanna like it, but it's one thing after another!
-- ok, venting over --
Anyone find a solution yet? Downgrade the OS?
Click to expand...
Click to collapse
I believe asus is releasing a new update for our tab in a couple weeks. Over on the tf300 forum, I heard they got a new update that I'm not entirely sure what it fixed, but it may or may not have fixed the battery issue, I'll have to look into that. So I would wait before jumping the gun and downgrading, but that's just me, it's a free country after all.
But as for now, there is no fix that I'm aware of.
Sent from my HTC EVO LTE using xda app-developers app

No such problems here - yesterday evening 91%+91%, today morning 89%+89%. Stock deodexed 4.2.1 ROM with _that2 kernel and some apps removed.