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[Q] Battery drain while sleeping?

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.
Click to expand...
Click to collapse
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?
Click to expand...
Click to collapse
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
Click to expand...
Click to collapse
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?
Click to expand...
Click to collapse
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!!

[Q] Battery Life & Wifi Disconnect

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

GummyCharged and battery Drain Issue

I know this has been discussed in the Gummycharge thread, but its buried pretty deep.
I know kej said that it has to do with the gallery, but I have uninstalled the Gallery3D.apk using the toolbox and I still seem to be losing about 10% per hour with the phone sitting idle on my desk.
Is there something we can use to quantify the appropriate battery drain rate? We all use our phones differently, so we need a way to standardize the battery drain so we can discuss it.
I saw someone mentioned that they were only losing 2% per hour while idle.
Currently, If i unplug the phone, and leave it sit for an hour (after a full charge) with only wifi on (gps, and bluetooth off) I lose about 10% per hour. If i use the phone at all, for example, When i wake up in the morning after a full charge and read the latest XDA posts, or some news articles, I can go from 100% to 85% in about 20 min.
this doesnt seem right.
Can we consolidate the battery drain issue to this post and post fixes and discuss reasons here?

This should have been posted in General first off.
Also, do you have SpareParts installed? If so, use that to check if your phone is entering sleep mode. You may have an app that is preventing your phone from sleeping, which will cause excessive battery drain like you are experiencing. My battery drain is <<1%/hr in airplane mode (I lose 1-2% over 8-9hrs in airplane mode) and when not in airplane mode, I'd say I loose at most 2-3%/hr if the phone is only sitting idle and I'm not using it.

imnuts said:
This should have been posted in General first off.
Also, do you have SpareParts installed? If so, use that to check if your phone is entering sleep mode. You may have an app that is preventing your phone from sleeping, which will cause excessive battery drain like you are experiencing. My battery drain is <<1%/hr in airplane mode (I lose 1-2% over 8-9hrs in airplane mode) and when not in airplane mode, I'd say I loose at most 2-3%/hr if the phone is only sitting idle and I'm not using it.
Click to expand...
Click to collapse
OK cool, I wasnt sure if this was a general issue or not. Can a Mod move it? Or should I just delete and Remake?
Ive looked in spare parts and Im not sure where it would give that information, under battery history ive got running at 38.2%, screen on 25.2% phone on 14.5% and wifi on 100%
nothing mentions sleep mode

imnuts said:
This should have been posted in General first off.
Also, do you have SpareParts installed? If so, use that to check if your phone is entering sleep mode. You may have an app that is preventing your phone from sleeping, which will cause excessive battery drain like you are experiencing. My battery drain is <<1%/hr in airplane mode (I lose 1-2% over 8-9hrs in airplane mode) and when not in airplane mode, I'd say I loose at most 2-3%/hr if the phone is only sitting idle and I'm not using it.
Click to expand...
Click to collapse
I get a drain of about 3-4% an hour if mine sits. However I leave it on LTE and at the office there is no LTE service yet. Yeah I'm just lazy......lol.
Curious on your SpareParts thing tho. I've never used it much really. Where does it show/display whether or not it is going into sleep mode. now I'm kinda curiosu if mine is correctly or not. Not that I'm very concerned about 4% and hr as I make it threw a full day fine. TIA

msticlaru said:
OK cool, I wasnt sure if this was a general issue or not. Can a Mod move it? Or should I just delete and Remake?
Ive looked in spare parts and Im not sure where it would give that information, under battery history ive got running at 38.2%, screen on 25.2% phone on 14.5% and wifi on 100%
nothing mentions sleep mode
Click to expand...
Click to collapse
If it's not running, it's sleeping. You're battery drain is likely caused by wifi being one 100%. If you are leaving the cell radio on, LTE, and also wifi, that is 3 radios on all at once, draining power.

imnuts said:
If it's not running, it's sleeping. You're battery drain is likely caused by wifi being one 100%. If you are leaving the cell radio on, LTE, and also wifi, that is 3 radios on all at once, draining power.
Click to expand...
Click to collapse
is that just an issue with the charge? with my Incredible, leaving wifi on saved battery as it did not need to talk to the cell tower and try to get a 3g signal. Also, Before I flashed, I was able to sit all day in school and still be at %80ish power.
I will see what turning wifi off does.. but to be perfectly honest. that seems a little inefficient, that would mean every time i turn on the phone to use it, i would have to turn on wifi and sync, then turn it back off again.
For example, since I wrote this post, my battery has gone from 87% to 70%. 17% in 66 min even with wifi on, that cant be "normal drain". And All i have done is looked at 2 text messages.
Please do not get me wrong, I am not complaining at all. but I would like to get to the bottom of this.
I was on my way to the store to return the charge I hated it so much, but after flashing gummy and your kernel, I love the thing more than any phone ive ever had. So please do not mis-judge my intentions here. I simply want to know if this is normal. In my experience with sell phones (Droid Incredible for over a year, Wife has htc thunderbolt, and now the charge both stock and now custom rom) It is draining much much faster than any phone I have used before.
If this is normal, then I will just deal with it.
I am going to put it in airplane mode for the next hour and see what happens

It is def something in connectivity. Still at 75% after 1 hour in airplane mode. going go turn on 3g only and check again in 30 min.
I was going through battery stats and saw that wifi ON was at 100% and Wifi running was also at 100%..
seems like maybe somethign is using my data. so if that is true, it should try while on 3g and I should get huge battery drain.
will report back

Dude you are NOT alone. my phone drains like a siv, when its nt even being used. I always have LTE off, unless i tether wifi and I always plug it in when i tether so i dont drain. Itll just sit and be idle with NO use and lose 30%. i have gps, wifi and bluetooth off..... wth? this phone is looking ro get returned if i cant sort it out. i cant sit on a charger all the time.

If you are running Gummy, the gallery thing should not be an issue anymore (he fixed it a few versions ago).
When you go into spare parts, go to battery history and change to sensor usage. That will tell you immediately if you have some app that is draining your battery (ie the Gallery).
For the most part the battery killer for people is network searching. 3G,4G and WiFi are all in the same boat in that they will kill your battery if your phone has to constantly scan for them. To my knowledge using WiFi is better on power than 3/4G, but that is only if you are connected to a good signal and your phone doesn't have to search.
Also, I have noticed that the WiFi antenna on my charge isn't all that good, so you may want to keep an eye on it during your day. You may find that it is losing WiFi and scanning without you realizing.

The LTE radio in the Charge can be a huge hog. Especially if your in an area that likes to switch between 4G and 3G. Both my work and my home switch between 3G and 4G a lot and its not uncommon to see my phone drain almost 10% in an hour. On a good day it will be 5% an hour with LTE enabled. With mobile data and wifi off it can go down 0-2% per hour.

As far as I know, this is most likely just a sign of the Charge's battery. I'm not sure what Engadget was smoking in their review, but my Charge gets pretty horrendous battery life, especially in areas with dodgy signal (think constant switching between 3G and 4G). This is the first phone I've bought extra cables for charging in the car and office, but honestly, with these things getting as crazy as they are, I think this might be the norm in the future, what with battery technology lagging behind so much.
Some tips I've learned: turn the Wi-Fi radio off when not in use, and if you're in a really low-coverage area, consider even turning data off (you'll still be able to receive calls).

I live in NY, which is absolutely blanketed by 4g. I get better 4g reception than 3g in some places. I am getting horrific battery life. I just wiped, then mounted each partition individually and wiped and then reinstalled gummy 1.8.5 and per imnuts' recommendation, not install the reboot options. I had a custom rom on this phone within an hour of purchasing this phone, so I can't compare stock to a custom rom's battery life. I just know over the few days I've had this phone, my battery has been terrible. I shudder to think what the Thunderbolt must be like.

Your battery may be draining fast the first boot. Just reboot it. If that doesn't work then it didnt flash properly. Just reflash everything and remember to clear data, cache... hope it helps.
You can download an overclocking app and reduce battery use IF you already solved the battery drain problem.
Sent from my SCH-I510 using XDA App

Higher battery draining after 3.2?

Hi
I do nont know but i have strange feeling that after 3.2 update my transformer drains more power. I mean the battery is draining faster than before the patch? Have you noticed similar thing? (i do not have the docking station)

I seem to be seeing that as well, and the wifi signal seems to be weaker. Not sure if I want to put in a problem report.

Wifi signal is weaker for me too, but the battery's been just fine.

I noticed also that the standby battery wasn't as good on 3.2 for me compared to 3.1. After messing around with the device for a while I found that even when the battery saving mode was checked, the keyboard wouldn't wake up the transformer but a touch of the trackpad did. I thought that there might be some background service that was stopping the transformer from going into deep sleep so I used advanced task killer to kill everything and the device would go into deep sleep. Also, I read on another forum that it might be a syncing service for picasa. I turned that off, killed everything using advanced task killer again and battery life now is equivalent to what I got in 3.1.

I feel my batterie last longer. But I have to measure it first.

I've done some (informal) tests, and I'm getting about .5%/hour consumption on standby after 3.2, where I was getting about 2%/hour consumption on 3.1 and earlier. This is just the tablet, mind you.
So, 3.2 has significantly improved the situation for me. I haven't really measured in-use as closely, but it seems pretty much the same (which is about 10%/hour consumption if I'm really using it).

wynand32 said:
I've done some (informal) tests, and I'm getting about .5%/hour consumption on standby after 3.2, where I was getting about 2%/hour consumption on 3.1 and earlier. This is just the tablet, mind you.
So, 3.2 has significantly improved the situation for me. I haven't really measured in-use as closely, but it seems pretty much the same (which is about 10%/hour consumption if I'm really using it).
Click to expand...
Click to collapse
+1 same here

My Wifi is very good
The battery is good

My wifi has improved by a bar and the battery seems a little bit better. But that's only if I don't struggle with trying to get on wifi.

Maybe during use but if anything my standby time is longer.

Battery seems the same to me, as does wifi.

cloud1111 said:
Battery seems the same to me, as does wifi.
Click to expand...
Click to collapse
That has been my experience also.

After 3.2 mine seems to be draining the battery quicker with wifi on & surfing. I might get 4 hours of continuous surfing if that.

Me too, last night I have 95% of battery before switch off to the standby mode (screen off with the wifi sleep), but this morning TF has just 72%.
I am now testing it. I switch off the wifi function first, then switch off to the standby mode.
My friend also notices this problem after upgrade to 3.2...he said 52% to 17% just one night sleeping...wow...what a unbelivable report!

Look at the battery use reports on your settings and see what is taking up a good chunk of your battery life besides screen and wi-fi and you may find a problem. For me, I saw that Google Maps took up 25% of my battery and I only used it for five minutes (it said that it was on for over two hours). I tried force closing and nothing worked until I uninstalled the updates for it and haven't turned it on. Now my battery life is much better. You may also want to check applications that are turning your wi-fi on to update themselves, like e-mail and facebook apps, etc.

Check for Google latitude. It appears to keep GPS running even when TF turned off.

I am on 3.2 since yesterday (Belgium) with B6 dock.
Fully loaded and half a day later in standby 63%.
On 3.1 this would have been 83%.
Battery drain is much greater on 3.2 on my TF!
(Damn, I hate the keyboard lagg whilst typing this)

Mine has been better since the update and I have the ****ty B4O dock. I charged mine on Sunday then went on vacation with it Monday, on way home now and only charged it once on Thurs one the dock finally drained and the tab was down to 60%. Seems like they did something to help as that was unseen before, I had to charge it daily.

I also notice faster battery drain after the 3.2 update.
when I went to bed last night: Tablet 97%, Dock 72%.
This morning (about 9 hours): Tablet is the same, Dock 30%. WTH???

I noticed it today. I leave my dock on the Transformer even when its off and folded. I used it a few times to in the span of 2 days tying into a journal. Today the dock was at 3% Screen at 98. Im guessing its feeding power to the screen. The only settings i have different is screen always on. I shut the screen down when im done using it, or set the Transformer aside or off.

Battery drain in sleep mode after 3.2 update

After using my transformer for a couple of months, the battery life amazed me the most. With about 9-10 hours battery and a couple of days sleep time which was very convenient. Also charging time was very fast.
But after updating to 3.2, I've noticed that when I leave the transformer on sleep like I usually do after using it, it would drain to 0% by the end of the day when usually it would only drain like 1-5% before updating it. I checked the processes and it doesn't look like anything out of the ordinary, and I haven't installed any new applications since the 3.2 update.
Anyone else having this kind of problem?

I have the same problem
Sent from my Transformer TF101 using xda premium

I came online to search for the exact same problem if anyone else had. And seems I am not the only one.
Now do you have the keyboard dock as well or just the tablet itself?
My case is that when I have both (tablet and keyboard) fully charged at 100% it will drain out in 18-24 hours whether I use it or not.

Under Location & Security make sure "Use wireless networks" is unchecked - that fixed it for me in 3.2

Reapman said:
Under Location & Security make sure "Use wireless networks" is unchecked - that fixed it for me in 3.2
Click to expand...
Click to collapse
Going to give this a try, as Im having this issue as well.
I found that putting the device into airplane mode stopped the battery drain, even though I had bluetooth disabled already, and WiFi policy was set to off when screen is off. Will see how it goes with "Use Wireless Networks" disabled in location settings.
Alternatively, I may write a small app that puts the device into airplane mode when the screen has been off for more than a couple minutes (and disables airplane mode when the screen is turned on)

I have this issue too.
I had mine docked into the keyboard. left it closed and went to work.
When I came back home late, I saw the tablet with 90+% battery and the dock at almost 0%.
Might be the same issue as you guys.
What I did is set the wifi policy to off when screen off.
and I tried again to leave it in the same situation.
Charged it full at night. left it overnight, woke up went to work, and came back. and I checked. Both are still way above 90%.
It makes a big difference for me. =)

I got the battery at 66% this morning and now after no use it was at 18%! I was about to throw my tf out of the window!

Ciela said:
Going to give this a try, as Im having this issue as well.
I found that putting the device into airplane mode stopped the battery drain, even though I had bluetooth disabled already, and WiFi policy was set to off when screen is off. Will see how it goes with "Use Wireless Networks" disabled in location settings.
Alternatively, I may write a small app that puts the device into airplane mode when the screen has been off for more than a couple minutes (and disables airplane mode when the screen is turned on)
Click to expand...
Click to collapse
I have done all this yet the drain continues. When I compare the battery drain of my tf101 with my HP touchpad, there is simply no comparison. There is virtually no drain even if I leave my touchpad uncharged for more than a day. On the other hand, my tf discharges battery when closed with the dock as if I am using it.
What gives?

Factory reset helped mine. 14 hours 81% with 3 hours of straight use.
Sent from my Transformer TF101 using xda premium

Reboot
Sent from my Transformer TF101 using xda premium

I got a huge battery drain today again, got my battery from 57 to 3 on the dock and from 100 to 88 on the tablet with less then 10 hours, just for comprasion I got only 7% down on the dock over night (like 9-10 hours) just this morning. when i checked battry use today I saw 63% used by wifi, this wasn't like this in the morning and all I did is just checked my email and sent it back to sleep, that's annoying as hell, i barely use it and it keeps on dying really fast..

Same here indeed the wifi policy set to never sleep-->Big drain wifi policy set to when screen off-->drain very little
Sent from my Transformer TF101 using Tapatalk

Reapman said:
Under Location & Security make sure "Use wireless networks" is unchecked - that fixed it for me in 3.2
Click to expand...
Click to collapse
same here,went from extreme drain to normal

It doesn't seem like the power button on the tablet works as well as the one on the dock. If docked, I only lose about %1 per hour.
I've noticed that if I use the one on the tablet, the screen will go dark, but sometimes the tablet doesn't sleep (verified via the battery status). I have the screen set to never timeout and the Wifi set to turn off. Bluetooth set to off.
The tablet lock button seems to be the most reliable and I always get about %1/hour drain when I use that button. Might be just a coincidence.
Is there are "real" sleep mode that we can access? It seems like sleep mode doesn't really sleep, it just shuts down certain items (the screen, bluetooth/wifi). I'm talking about like an S3 state where power is cut to the processor and the only the memory is keep.
If there is a real sleep, it seems like the device has a choice. I want a "Go to the Fok to Sleep" button!

Reapman said:
Under Location & Security make sure "Use wireless networks" is unchecked - that fixed it for me in 3.2
Click to expand...
Click to collapse
I did this and it worked for about an hour (cpu spy) but then something woke the tablet and it never went back to deep sleep and wiped out the dock battery in about 4 hours. If I turn wifi off standby life is good. However I woud really like to keep the wifi on and get good battery life.
This working consistently for you?

I was ready to replace my dock. This worked like a charm. I went from 1-5% per hour in sleep to <.5% per hour.

I just figured it out this week. I was running WEP at home and this prevents both of my android devices from sleeping like they should. I know I shouldn't be running WEP but neighbor is wide open so I was too lazy to change. Open and WPA allowed sleep on both devices about 80% of the time in standby and big improvement in battery life. Still keeping my eye on it but difference was immediately noticeable with cpu spy.
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After further review it appears it wasn't WEP. All was well until I put my laptop and computer back on wifi then both infuse and transformer had inconsistent sleep. I disconnected computers and both android devices sleep again. Updated my router firmware but no improvement. Any ideas?
Update: I believe my router is doing this. Works fine until I connect other wireless devices then drains. There are sporadic reports of this in other forums for dlink dir-655.
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After 3.2.1 or possibly the Maps update, my wifi stopped powering on after sleep. It would start and stop, even airplane mode would not break the cycle. Frustrated, I turned the location setting back on, reinstalled maps and left it undocked. Woke up this morning. 98% battery. Arg. WTF is going on? This is maddening. The dock drain seems to fluctuate between 8-40% in 8 hours and I get 2% undocked? Is the dock the issue (that would suck).
I'm docking it again tonight. Maybe it was reinstalling maps? This is really frustrating. With 3.2.1 the browser is stable, Skype video now is going. This is the last issue with TF before I can strongly recommend it to my friends.

I am getting some nasty battery drain now too. Approx 30% overnight with wifi off. Im very happy that skype works though.
Sent from my ADR6350VW