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[Q] Dock Battery Issues??

I have a tf300t with the dock. When I leave it to sleep, it just seems to drain the battery like it isn't sleeping properly. I'm on the latest firmware. I was going to root, but got all new gadget happy and let the newest firmware rollover. Whoops. Anyways I think asus has enough customization baked in that I don't know if any 3rd party rom will support this tablet as well the stock roms. Really the experience is stock/vanilla enough, that I haven't had a problem with the asus firmware. Just missing root (and I know I have a few parachutes left....)
Sorry for the ramble here. Ive read on several forums that people with the tf300t are having awful battery life while it should be hardly using any with the dock attached and sleeping. I have a battery monitor running now to look for drain in the OS, where wakelocks might be happening, but everything points to the dock. I *did* have the dock enabled during sleep option for a long time. I turned it off and still had a pretty persistent drain. Wifi should be disabling during sleep, but without any way of testing I dunno. It seems to sleep (and had even turned off once or twice on its own dunno why) when the keyboard is closed, but something really isn't right here. Anyone know what's going on? I know this is a semi-common problem. I would swap the hardware, but I don't know if that's really the issue.

Battery going dead when suspended...

My new TF700 battery drain seems huge when suspended. I fully charged the battery for a test. It showed 100%. I then hit the power button to suspend. 6 hours later I check and it is already down 13% At this rate it will loose 50% in 24 hours just sitting suspended. Is this normal? I'm new to tablets and Android. But a friend of mine has a Samsung and his battery hardly drops at all when suspended. Thanks for your input.

Noticed this also. It started after the update with the .26 firmware...
Sent from my ASUS Transformer Pad TF700T using xda premium

We obviously need more info to say something sensible about this, since your install is not the same as mine (apps and services running in the background, etc.). Install BetterBatteryStats and analyze what's going on, then report back in.
Furthermore, 2% battery drain per hour doesn't seem that extraordinary to me, but then I might be wrong. My SGS2 drains 2% per hour on stock ROM/kernel, and my wife's LG Optimus 2x in the same conditions pulls 4%/hour. Granted, I do 0.25%/hour currently (on a custom ROM), and hers is running CM7 ('nuff said, since that just goes on and on and on and on... ), so it definitely could be better, but running stock, I'm not that surprised. Have you got syncing disabled? WiFi running? Exchange in the background?
Sent from my ASUS Transformer Pad TF700T

I just checked mine after 15 hours asleep on the couch, and it was down to 93%. That's similar to the TF201 and TF101 I had before, though it may be a little better. As otherwise mentioned, the drain also depends on what you have installed and running.

If you're using a live wallpaper, turn it off. Those are a huge battery drain (for no significant gain, in my opinion).
Then check all of your widgets to see how often they are updating, I suspect some of them are pulling more often than they should.

Asus, some feature/improvement requests

I'm just going to start a list of feature/improvement requests:
1) WiFi- the signal is much improved from the 201, but is killing the battery. I routinely see the WiFi using >50% of my battery. I noticed that even when it is on, but not connected, it still is chugging along, slurping battery. I suspect that scanning every 5 seconds is doing this, even when connected to a network. Its just Constantly scanning. On a cell phone w/ a mobile network where people are in motion, i can see this as more necessary, but not on a WiFi only tablet. Is there a way we can kill the scanning when connected and only scan if requested manually? It's nice that things pick up automatically on start up, but then it largely becomes redundant after you are connected. Some adjustable settings on that would be nice. Battery life would improve a bit i suspect.
Edit: i tried a little experiment, WiFi doesn't scan every five seconds, i counted about 30 seconds. I tested by reading the observed networks on one side of my house where i can weakly pick it up, then walked to the other side where i couldn't and counted how long it took to go away automatically. That is 2 scans a minute, 120 an hour. Tell me that doesn't affect battery life for no good reason, especially when I'm connected to my WiFi already.
More to come as i run across them.

Sorry your test is rubbish ^^
Connect your router via LAN to a computer. Goto your router log and see how often the infinity tries to talk to the router.
That would be a more realistic time

>implying Asus will listen to a lowly consumer like you or me

From where do you draw the 50% WiFi consumption, the standard Android battery app? It is flawed. Check your battery consumption in BetterBatteryStats, that works far better. Then report back in.
Sent from my ASUS Transformer Pad TF700T

MartyHulskemper said:
From where do you draw the 50% WiFi consumption, the standard Android battery app? It is flawed. Check your battery consumption in BetterBatteryStats, that works far better. Then report back in.
Sent from my ASUS Transformer Pad TF700T
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Looks like Google currents was a big hog... other than that not sure what I'm looking at on that app

jrkart99 said:
Looks like Google currents was a big hog... other than that not sure what I'm looking at on that app
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I agree, I've never been able to really understand what BetterBatteryStats is trying to tell me. I've used it to find apps that were stopping deep-sleep from working, but beyond that, I haven't really found it very useful. Very hard to interpret.
Sent from my ASUS Transformer Pad TF700T using Tapatalk 2

Ok I'll bite.
2 Stereo Speakers
Think they heard me? Why why why can't ASUS put decent speakers on this thing. Or at least if they put one, why can't it be a speaker that someone other than my dog can hear?

Larger battery capacity.
Prime and Infinity both have the same battery size, yet Infinity runs at a higher clock speed, thus using more voltage and has a higher res screen.

[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.
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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.
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Same problem since the 4.2 update...

WoozyBE said:
Same problem since the 4.2 update...
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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:
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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...
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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.
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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.
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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.
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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
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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.

battery life sucks

hey guys i would like to know whats the best battery life wise rom you have use. i leave my tab off fr the whole day and it went down 20%. i read someone went down the same amount in a week.

phillytothemax said:
hey guys i would like to know whats the best battery life wise rom you have use. i leave my tab off fr the whole day and it went down 20%. i read someone went down the same amount in a week.
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I wouldn't believe someone actually pulling a month on a single charge (since that is what a 20% decrease in a week implies!). I run about three days on a charge, and that's with the dock attached. (EDIT: I can easily drain the tablet+dock combo in a few hours of heavy (graphical) use.)
You can join in here:
http://forum.xda-developers.com/showthread.php?t=2248896
to see if there's an app going haywire. Most of the actual "bad battery life" cases have a rogue app.

well this person said it wasnt on screen off time. noooooo use

Stand alone tablet without dock? And WiFi on or off? If WiFi is on and it's standalone tablet 20% seems to be fine for a whole day.
Sent from my HTC One X using xda app-developers app

With everything off (wifi off, gps off, locationservices off, maps disabled, static wallpaper, no moving widgets, apex launcher, etc) and on standby without ever touching it, mine has dropped 4% in 29 hour.
So it is possible.

ShadowLea said:
With everything off (wifi off, gps off, locationservices off, maps disabled, static wallpaper, no moving widgets, apex launcher, etc) and on standby without ever touching it, mine has dropped 4% in 29 hour.
So it is possible.
Click to expand...
Click to collapse
Is that avatar you? Damn, you're hot.
Anyway, that way it is in deep sleep pretty much the entire period. I haven't stopped handling my 700 for that amount of time yet. (GPS off, Location Services off, static wallpaper and no widgets is my standard setup as well -- all this drain... ugh!)

MartyHulskemper said:
Is that avatar you? Damn, you're hot.
Anyway, that way it is in deep sleep pretty much the entire period. I haven't stopped handling my 700 for that amount of time yet. (GPS off, Location Services off, static wallpaper and no widgets is my standard setup as well -- all this drain... ugh!)
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Actually, I bought my tablet to use it. So let it drain!
Sent from my HTC One X using xda app-developers app

J_Dutch said:
Actually, I bought my tablet to use it. So let it drain!
Sent from my HTC One X using xda app-developers app
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I fully agree to this^^ statement. I'm not the OP, therefore.

MartyHulskemper said:
Is that avatar you? Damn, you're hot.
Anyway, that way it is in deep sleep pretty much the entire period. I haven't stopped handling my 700 for that amount of time yet. (GPS off, Location Services off, static wallpaper and no widgets is my standard setup as well -- all this drain... ugh!)
Click to expand...
Click to collapse
Yes, that's me Thank you.
Well, it's meivakantie, so I've been home mostly. I've been way too absorbed in Divinity 2 xD Which means I'm on my laptop most of the time (except now, I have to pick up my ID card at the police station. And no, I haven't told them I know their WiFi password is ' Politie.'. :laugh: Do they have to prove their stupidity at every possible opportunity?)
I do have some widgets (Zooper 2x and 1 Eweather HD.) But they're both set to update manually only.
J_Dutch said:
Actually, I bought my tablet to use it. So let it drain!
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An excellent point; none of us bought a 700 euro tablet to stick it in a bag.
Sent from my ASUS Transformer Pad TF700T using Tapatalk 2

ShadowLea said:
With everything off (wifi off, gps off, locationservices off, maps disabled, static wallpaper, no moving widgets, apex launcher, etc) and on standby without ever touching it, mine has dropped 4% in 29 hour.
So it is possible.
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Click to collapse
Which version of Android are you running?
Using 4.1, I was getting results similar to yours. Since upgrading to 4.2 though, it seems to be more like the OP's.

becomingx said:
Which version of Android are you running?
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Still on 4.1.2. Considering all the mentions of issues with WiFi, Battery and other, I'm a little hesitant to update to 4.2. Also, it looks hideous.

ShadowLea said:
Still on 4.1.2. Considering all the mentions of issues with WiFi, Battery and other, I'm a little hesitant to update to 4.2. Also, it looks hideous.
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Hmm? Looks the same to me. You mean the new default launcher that ASUS thankfully doesn't ship with by default?

Same as OP
I have the same problem as OP with 4.2 but I have the keyboard dock. I can leave my tf700 for 2-3 days without using it and come back and its dead. This is from a 80-90% charge. I think there must be something with the deep sleep not kicking in.
I am thinking of looking back at the build prop to see if that helps with deep sleep. I have wifi off, gps off, brightness down. I did have location services on but figured I could so that's news to me and the only other thing I have is a moving wallpaper. Could those to really be causing all this drain? There has to be some way of getting deep sleep to truely sleep deep and shut down everything..

ShadowLea said:
Yes, that's me Thank you.
Well, it's meivakantie...
Sent from my ASUS Transformer Pad TF700T using Tapatalk 2
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Haha geweldig, niemand die het begrijpt maar toch!
Fijne vakantie!
Sorry guys. Was a little off topic.
Sent from my HTC One X using xda app-developers app

New app to help with deep sleep
I just installed DS battery saver pro and I am hoping it will actually help with deep sleep. I had power switch but it did nothing but pop up and bother me and never actually shut anything down. I am hoping this app will actually do what it says it can do and shut down all apps and everything when the screen is off.

I am having the same problem since the 4.2 update. I charge my tablet+dock and after 2 days of standby ONLY - no more juice. Everything turned OFF, never touching the tablet.
Any way to downgrade back to 4.1?

the_punkreas2003 said:
I am having the same problem since the 4.2 update. I charge my tablet+dock and after 2 days of standby ONLY - no more juice. Everything turned OFF, never touching the tablet.
Any way to downgrade back to 4.1?
Click to expand...
Click to collapse
Yes, you can just flash the 4.1 firmware to downgrade. The 4.2 bootloader works fine with the 4.1 rom.
Don't forget to wipe cache and dalvic. If you have problems afterwards you may have to do a factory reset and re-install your apps.
There's a guide somewhere, I believe in the General Discussion section, on downgrading.
Sent from my ASUS Transformer Pad TF700T using Tapatalk HD

Along with the battery drain my battery is showing 100% and never changes.
Anyone else?

MartyHulskemper said:
Is that avatar you? Damn, you're hot.
Anyway, that way it is in deep sleep pretty much the entire period. I haven't stopped handling my 700 for that amount of time yet. (GPS off, Location Services off, static wallpaper and no widgets is my standard setup as well -- all this drain... ugh!)
Click to expand...
Click to collapse
Down boy.

lafester said:
Along with the battery drain my battery is showing 100% and never changes.
Anyone else?
Click to expand...
Click to collapse
Nope - everything fine here. The battery seemed to drain very fast after I flashed the first 4.2 rom. But after a few charge/discharge cycles everything seems to be honky dory.
Took a fully charged tablet/dock off the charger about 16 hours ago. Did the usual surfing, reading the forums, email etc, watched a couple of episodes of Breaking Bad, downloaded the latest Cromi-X rom and installed it with mods - I would call it a day of light use.
The dock s now at 9%, the tablet at 90%. :thumbup:
Your battery calibration may be totally off. Have you tried this:
Let the tablet drain to almost 0%, connect it to your PC via USB cable and make sure the PC is on and not going to hibernate or sleep. Let the tablet trickle charge all night - at least 8 hours.
That seems to have helped in some cases....
Sent from my ASUS Transformer Pad TF700T using Tapatalk HD