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I have a Gtab with TnT Lite 2.2.0, and its been asleep for approximately 24 hours. When I slept the display yesterday, the battery was at 92%. Just woke it up, and now its 52%.
I slept it via a quick press of the power button on the side. Should I long press and then select 'Sleep'? Seems like the WiFi was definitely off, when it woke up it had to reconnect to the wireless. Its been awhile since I messed with Android, my last device was a G1, and I'm not sure if it lights up the WiFi when its asleep. My battery use is WiFi - 45%, Device idle - 44%, Android System - 10%, Display - 2%.
Does this sound normal battery drain?
Sounds normal to me. I went from 75 to 34 overnight, just sitting unplugged.
If you're running TnT Lite, don't let the battery get to low... Mine got low, started a FC loop and I lost everything. Guess it's time to start over
This drain is why I want to see if getting SetCPU or similar apps working would help keep screen off battery use down to a minimum. It may or may not work, there may be other apps and things we could try, something to really shut down all the extraneous running junk.
Mine loses about 4%/hour in sleep mode. But I have the problem with my unit where it won't "wake up" once I put it to sleep (detailed all I've tried to fix this on this thread: http://forum.xda-developers.com/showthread.php?t=855821).
Even though it won't wake up, it still burns about 4%/hour in sleep mode.
To work around the "it won't wake up" I use regpon wifikeepalive from the market which prevents the cpu from totally disengaging. I also use CPUBoost from the market to set the cpu to 216000 when the screen is off. Doing this should still result in higher battery drain than if the unit slept properly but in my experience it does not, it still drains at about 4% an hour.
My Archos 101 however does not behave like this. When sleeping it drains at a rate of about 1% every 2 hours. Whereas the GTablet will die in sleep mode in about 25 hours, the Archos could stay alive for about 200 hours!
I did some testing with the two, using DDMS (part of Android SDK). Oddly, when the Archos is "sleeping" the USB port is still active and I can get logging out of it, whereas the GTablet shuts down the USB port (odd becuase its the GTablet which is burning battery). The Archos does seem to log its power down/power up elegantly from what I can tell...I can't tell anything about the GTablet because it shuts down the USB port for debugging. Log2SD on the Gtablet doesn't really tell me much either.
There is something very wrong with the power management stuff on this chipset/or on the GTablet. This is definitely something that would be good to see addressed at some point. Having a tablet that can stay away from the wall charger for a week (Archos) is definitely nicer than having one that you have to put on a charger nightly.
Can anyone else report what their battery drain is like while the unit is sleeping?
Sean
If you run dmesg (either via ADB shell or via Terminal Emulator) you'll probably see lots of wake-sleep-wake-sleep activity going on while it's supposedly asleep. At least I've seen that with Vegan ROM.
Also, just because your Wifi was asleep when you woke up the G Tablet doesn't in my experience mean it was really asleep the whole time.
As an experiment, I'd suggest you charge up your G Tablet, then manually turn off Wifi and try sleeping it overnight. When you wake it up, check the battery usage and compare - I'm guessing it will be significantly lower, but you need to try for yourself.
The power management stuff is definitely still quite beta quality with our kernel and ROMs. I think that's mostly NVidia's fault. To a lesser extent it's a function of support from the ROMs which will improve.
rcgabriel said:
If you run dmesg (either via ADB shell or via Terminal Emulator) you'll probably see lots of wake-sleep-wake-sleep activity going on while it's supposedly asleep. At least I've seen that with Vegan ROM.
Also, just because your Wifi was asleep when you woke up the G Tablet doesn't in my experience mean it was really asleep the whole time.
As an experiment, I'd suggest you charge up your G Tablet, then manually turn off Wifi and try sleeping it overnight. When you wake it up, check the battery usage and compare - I'm guessing it will be significantly lower, but you need to try for yourself.
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Thanks for the dmesg advice, I'll play with that. I'll try turning off my wake fix hack (regponwifi), turning off wifi, letting it sleep overnight, then restarting it (since it won't wake) in the morning to see if the battery drain goes down and report back here tomorrow.
Sean
Narcoleptic said:
I have a Gtab with TnT Lite 2.2.0, and its been asleep for approximately 24 hours. When I slept the display yesterday, the battery was at 92%. Just woke it up, and now its 52%.
I slept it via a quick press of the power button on the side. Should I long press and then select 'Sleep'? Seems like the WiFi was definitely off, when it woke up it had to reconnect to the wireless. Its been awhile since I messed with Android, my last device was a G1, and I'm not sure if it lights up the WiFi when its asleep. My battery use is WiFi - 45%, Device idle - 44%, Android System - 10%, Display - 2%.
Does this sound normal battery drain?
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Mine also drains way too much when sleeping. Right now I'm experimenting with disabling services. Calendar, Gmail, Contacts, Dropbox .. many of these just duplicate what my phone does so I just moved them to bookmarks in a browser.
Something really eats battery when asleep. In comparison my iPad would probably go a month in sleep mode. Whatever Apple is doing with batteries and power management is fantastic.
I'm currently running Vegan 5.1 and hope to switch over to Cyanogen 7 soon. I may try playing with Juice Defender.
So I reflashed last night using Pershoot's new kernel and tntLite 4.21. I've loaded almost nothing back on the unit. I shut down wifi, presed the power button to put the unit to sleep overnight and here's what I saw:
80% @ 12:27am
48% @ 9:18am
So it dropped 32% in almost 9 hours or around 3.5%/hour. Note that it still didn't wake from sleep, I had to reset it. Pershoot posted that he's going to try to put more logging in his kernel to see what is going on with the failure to wake scenario.
Clayfree, I'm not sure this is an Apple vs Android thing, the Archos 101 I have here is Android and it drops battery life MUCH slower than the Gtablet. I think this is more a Gtablet issue. This is going to be an issue for Google, different hardware makes it a much more challenging proposition than what Apple has to deal (one type of hardware that they control).
Sean
stiphy said:
So I reflashed last night using Pershoot's new kernel and tntLite 4.21. I've loaded almost nothing back on the unit. I shut down wifi, presed the power button to put the unit to sleep overnight and here's what I saw:
80% @ 12:27am
48% @ 9:18am
So it dropped 32% in almost 9 hours or around 3.5%/hour. Note that it still didn't wake from sleep, I had to reset it. Pershoot posted that he's going to try to put more logging in his kernel to see what is going on with the failure to wake scenario.
Clayfree, I'm not sure this is an Apple vs Android thing, the Archos 101 I have here is Android and it drops battery life MUCH slower than the Gtablet. I think this is more a Gtablet issue. This is going to be an issue for Google, different hardware makes it a much more challenging proposition than what Apple has to deal (one type of hardware that they control).
Sean
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Yes I agree it's probably not an Apple/Android issue. The only other tablet I have is the iPad so I compare them by default. I do have a Samsung Vibrant that does really well with battery life.
What I will say about Apple is that they are very conscious of battery life and how it shapes our perceptions and usage of their products. With the iPad i NEVER think about the battery and it really affects how I use it. Don't get me wrong, there's plenty I don't like about the iPad and that's why I'm here
When you guys talk about putting the G-Tab to sleep, are you just pressing the power button for a short period to turn off the screen? Is that sleep or just screen off? Because if I hold down the power button to bring up the shutdown options, there is a "Sleep" option that can be selected. Are these two the same mode, or two different things?
I'm talking about both methods, I believe they are the same thing. I've observed similar results using either method, namely that my tablet won't wake up.
I will run another test at some point using the sleep option.
One interesting thing to note is my Archos 101 has a "deep sleep" option too on the power button hold. Not sure what this means, and why this isn't an option on a Gtab.
Sean
smalis said:
When you guys talk about putting the G-Tab to sleep, are you just pressing the power button for a short period to turn off the screen? Is that sleep or just screen off? Because if I hold down the power button to bring up the shutdown options, there is a "Sleep" option that can be selected. Are these two the same mode, or two different things?
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That's a good question. I just press the button. I have not tried using the sleep command.
I'm really worry about this... I use Current Widget to get the battery consumption and is SO high! much more than any of my Android phones in Airplane mode...
Any solution? I tried TnT rom and Vegan... and it's the same!
Thanks!!
Is anybody seeing heavy battery loss during standby mode?
On average my TF is losing between 3.5 and 5% battery in standby mode. I have done a few tests with and with out airplane mode and it does not change.
I currently have an RMA setup with ASUS but I dont want to have to send it back and wait 14 days, so I wanted to reach out here first.
Thanks in advance,
Brandon
Every device I've ever owned has lost power during standby. That's the tradeoff. Otherwise, you could, you know...turn it off?
Windows has that nice "hibernate" hybrid.
It's totally not worth an RMA...don't let your OCD win.
There are a few processes that run in the background like Android OS, WiFi, keyboard etc. It needs to be reactive to certain signals so it can't be off completely. The iPad has amazing stand-by times but I don't know why. I just saw it when I borrowed one for a day from a friend.
I would NOT RMA my device unless it's a significant drop in battery life (>10%/h); it's just the way it is mate!
But what I realized is after I rooted, installed SetCPU and set the governor to ondemand the battery life has increased significantly. It idles at 216MHz now.
mine doesn't have a great standby time either, pretty bad actually when you compare it to my xoom. however its an issue that should be fixed with a software update and it shouldn't require an rma.
Sent from my ADR6400L using Tapatalk
Check if you have your Wifi on sleep also?? Depending on number of applications that you use for updating it might be using your battery.
There are a number of other threads already discussing the issue of battery life in standby, but here's my conclusion: the TF has an issue with wifi that if you set it to stay on while the TF's screen is off (a setting in the wifi section of system settings), it burns quite a bit of battery while on standby. If you set it to turn off when the screen is off, then it doesn't.
I know this is a bug with the TF because the Xoom does not exhibit this behavior. It burns less than .5%/hour when on standby with wifi set to stay on when the screen is off. The TF gets this same performance (<.5%/hour burn) on standby only if wifi is set to turn off. Otherwise, I'm getting the same as you: around 3.5%/hour burn rate.
I'm assuming that the TF's wifi just doesn't enter whatever low-power state it's supposed to enter while on standby. My second assumption is that this is something that will get fixed in an update.
Sent from my Transformer TF101 using Tapatalk
I just turn on airplane mode when I know it is going to sit, and it burns about 1% an hour.
wynand32 said:
There are a number of other threads already discussing the issue of battery life in standby, but here's my conclusion: the TF has an issue with wifi that if you set it to stay on while the TF's screen is off (a setting in the wifi section of system settings), it burns quite a bit of battery while on standby. If you set it to turn off when the screen is off, then it doesn't.
I know this is a bug with the TF because the Xoom does not exhibit this behavior. It burns less than .5%/hour when on standby with wifi set to stay on when the screen is off. The TF gets this same performance (<.5%/hour burn) on standby only if wifi is set to turn off. Otherwise, I'm getting the same as you: around 3.5%/hour burn rate.
I'm assuming that the TF's wifi just doesn't enter whatever low-power state it's supposed to enter while on standby. My second assumption is that this is something that will get fixed in an update.
Sent from my Transformer TF101 using Tapatalk
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+1 on this. Looking forward to the updates
wynand32 said:
There are a number of other threads already discussing the issue of battery life in standby, but here's my conclusion: the TF has an issue with wifi that if you set it to stay on while the TF's screen is off (a setting in the wifi section of system settings), it burns quite a bit of battery while on standby. If you set it to turn off when the screen is off, then it doesn't.
I know this is a bug with the TF because the Xoom does not exhibit this behavior. It burns less than .5%/hour when on standby with wifi set to stay on when the screen is off. The TF gets this same performance (<.5%/hour burn) on standby only if wifi is set to turn off. Otherwise, I'm getting the same as you: around 3.5%/hour burn rate.
I'm assuming that the TF's wifi just doesn't enter whatever low-power state it's supposed to enter while on standby. My second assumption is that this is something that will get fixed in an update.
Sent from my Transformer TF101 using Tapatalk
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Is there an adjustment for the Wifi and/or app settings. In general the second or third largest power consumer in these devices is the radios. The radio needs to be powered up whenever a connection needs data. This can be for keep alive messages that verify the existence of a wifi connection to an access point, or from an app such as gmail, calendar, etc. checking for new data. In any case there may be settings that allow one to decrease the frequency of these operations.
ssj4vegita2002 said:
I just turn on airplane mode when I know it is going to sit, and it burns about 1% an hour.
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FYI, I did a few tests with airplane mode on and I was still losing around 3.5%-5% battery life.
I did do a few more tests, and my most recent test I found interesting.
I use my TF as usual and had a few applications running, I then turned off the screen and let it sit for an hour and 4% battery life was used.
Then I powered down my TF fully, then I powered it back up and turned off the screen. (Currently the TF is up and running but no applications have been opened aside from backround apps Syncing).
I put the TF into standby (turned off the screen) at 1:37 am and I had 53% battery life.
I checked on the TF in the morning at 8:51am, and I had 51% battery life.
So in just over 7 hours my TF only used 2% battery life in standby which is a very acceptable range.
Conclusion, what ever apps we are opening and using under normal use are not being fully closed out, and are running in the backround, not the backround services as per the airplane mode test.
I will do a few more tests tommorrow, I hope this helps and I look forward to others feedback!
Brandon
Brandon - Please check out yours with wifi set to turn off when the screen is off. In all of my testing (similar to yours), that made the difference between great standby performance (<.5%/hour) and not-so-great (3.5%/hour or more). Nothing else seemed to matter, including manually turning off just about every app that normally runs in the background and verifying that they stayed off.
Hopefully soon Asus will also fix the battery stats bug so that we can see what apps/system components are actually using power on standby. Or they'll just fix wifi so that it sleeps as it should.
Sent from my Transformer TF101 using Tapatalk
I have already done the tests with WIFI turned off and also with the TF in Airplane Mode.
So far the only time I have gotten great standby time was when I rebooted my TF and did not open any applications. (WIFI was on FYI)
Brandon
so, the last two night i've gotten great result from stand by mode. The first night i went and killed couple of programs, before putting in AP mode for the night. 12:45 am till 9:00 am from 78% 75%. Last night at 12:00am had 34% this morning at 8:00 it dropdown to 32%.
I took a screenshot of the battery usage after waking up in the morning. Wifi was left on with the sleep policy set to sleep on screen off. It seems to turn back on intermittently but the awake bar seems to happen more often the longer it is in sleep. Is that meant to happen? What does awake signify? That the screen is on?
background data probably running in the background
like weather updates to it to refresh every 4 hours or something
its weird though, towards the right theres like 2 times where the device is awake for long periods of time :S
brandonpaz said:
Is anybody seeing heavy battery loss during standby mode?
On average my TF is losing between 3.5 and 5% battery in standby mode. I have done a few tests with and with out airplane mode and it does not change.
I currently have an RMA setup with ASUS but I dont want to have to send it back and wait 14 days, so I wanted to reach out here first.
Thanks in advance,
Brandon
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Click to collapse
Would you try "Task killer" for decreasing battery loss?
My battery seems to be dying alot quicker now I have the dock. Hopefully a new firmware will come out that'll lower the battery consumption of the dock when its in standby.
I just noticed in the past few minutes that my gmail is pushing to my tablet despite the screen being off and my wifi policy set to off when sleeping. I've also found some issues when it would actually cut the wifi off when sleeping, and when it comes back it doesn't want to reconnect to my router.
My other issue is battery life related. Last night I *believe* I turned airplane mode on before going to sleep and when I woke up 9 hours or so later, the battery was at least 10% down, I think more than that but I didn't take note of it at night. Even if wifi was on, it should've been shut as my sleep policy is that way. Looking through other threads people seem to be experiencing 1% or so battery drain in an hour. The other factor is that I have setcpu installed and a screen off profile that maxes at the second lowest frequency. This morning I installed netarchy's kernel and lowered my setcpu profile so it stays at the minimum frequency when the screen is off.
I'm running Prime 1.3 (didn't do the r2) and have manually removed a handful of the Asus apps that I don't use/want, and I have GPS disabled.
What 'concerns' me is that I have a droid incredible for a while now and with it, I get no battery drain overnight with airplane mode on (at least none that registers) and that's a battery with a fraction the capacity of the transformer. Moreover, I have a very few apps on my tablet whereas my phone has quite a few and basically beyond the stock stuff on the tablet the same apps are on my phone. Also, the battery stats window on the transformer doesn't show any info about apps. I've had my phone on since I woke up, on 3g and I'm at 90% with not much use. And I thought that my phone got meh battery life.
ive had some issues with wifi disconnecting and wouldn't stop disconnecting till a reboot. cant find any news on it. ive tried all firmwares now and still have the issue.
I been having the same issue. Last night I reflashed the 8.2.3.13-20110511 build, to see it it will help. Mine is stock not rooted.
I have the dock and use the pad with most of the time, both are loosing battery life even after I do a complete shutdown. To me it seems it has gotten worse after the 8.2.3.13-20110511 build update. The WiFi is loosing connection when the dock goes dead so I have to reboot the pad to get it to reconnect.
I also have contacted Asus tech. On another thought I really wish in Android you could disable startup apps without rooting.
-M
Was hoping for more replies but my naturally long-winded posts probably scared everyone off...
I wiped my device and installed Modaco's ROM. I didn't touch the stock apps and only things I've installed are Titanium & Tasker. I put together a Tasker profile to kick airplane mode on when the system is put to sleep, and turn it off when unlocked (unless airplane mode was enabled when put to sleep). I also installed Setcpu and setup a profile to keep the CPU frequency to the minimum when screen is off.
I charged to 100% and let it sit overnight. When I woke up I was at 98%, when I got home a little while ago it was at 96%. Note that I hadn't used the tablet other than for a brief minute or two to check the battery stats. As of now I'm showing 15hrs 51mins on battery with a 4% drop. I've had it in airplane mode the whole time. Oppositely, I had my droid incredible at 100% and played Drop7 (great game btw) for at least 20 minutes before going to bed last night, and it was still 100% when I woke up (it was in airplane mode overnight). I find it weird that my droid incredible, with a 1/4 of the battery capacity doesn't drop at all overnight even with a game being played, and the transformer drops 2% in that time idling.
Has anyone wiped battery stats via CWM?
When I setup AutoStart, I noticed the power state event for screen on/off is off by default. I tried turning back on, seems to improve battery on sleep.
Sent from my Transformer TF101
Has anyone else been able to update their nexus s to 4.0.4 i flashed the update through cwm (but i dont have root anymore now) and im still having some battery problems after 20 minutes i was down to 84 % from 100, anyone else having battery issues still or is it fixed for some people?
Did you set the brightness in auto mode?
Ya my brightness is on auto, would that be killing it more?
perhac88 said:
Ya my brightness is on auto, would that be killing it more?
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It's only my opinion, I never had a battery drain but... just today I set the brightness on auto and guess what? Battery drain.
Try this: disable auto brightness, reboot (important: seems that disable without a reboot of the phone, didn't works as a workaroud of battery drain) your phone and give it a try.
Ok ill give that a try then hopefully it will help thanks
don't forget to tell us if it works for you or not!
Ok so i turned off outo bright and put down the screen brightness pretty low and it does seem to be helping a bit im still seeing more battery drain but not as much with auto bright turned off
That battery drain is very high. My Nexus S drops 2-3% per hour while idle. With flight mode enabled it only drops 2-3% overnight. I would suggest install CPUSpy or similar to check your device is going into deep sleep. You could have an application causing a wake lock and not allowing sleep.
How is everyones standby Drain?
Mines appaling. Even over night it drains about %6 with nothing running and airplane mode on! I've already reset it since the April update and cleared cache etc. SOT is good enough but obviously I will manage less of that with the poor standby drain.
That's about the same for me. 7 or 8% but no airplane mode
I have bixby routine that enables power save mode and disables wifi and mobile data from 22h00 until 06h30 the next day...I loose perhaps 2-3% for that period. Without power save I loose for the same period of time 6-9%
~3% overnight drain. No flight mode.
I lose around 4-5% in 8hrs. That is with WIFI on and Flight mode OFF.
mine has gone down hill over the past few days - not sure - but went from 5% overnight to 15% - didnt change anything - just installed the app updates that were available so am thinking something with an app - but nothing showing up in the battery life check
2-3% overnight drain with everything on, get the galaxy max hz app and enable doze and powersaver mode when screen is off, before mine was 6-8% a night now its 2-3%
1% per hour on average when left idle overnight with wifi on
matty100147 said:
2-3% overnight drain with everything on, get the galaxy max hz app and enable doze and powersaver mode when screen is off, before mine was 6-8% a night now its 2-3%
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Is this only in the payed version, because my issue at the moment with this app is, when my phone goes into battery saving mode, when it comes back out (with bixby routine) the phone is stuck in 60 hz. Basically, i have to manually set up the adaptive refresh rate everytime.
Is this problem gone with the payed version? Or am i doing something wrong.
Cheers