Database Info

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

Wifi issue?

Ok I think I found an issue with my infinity and need some confirmation. Here is the test. Charge tablet to full. I remove from charger and spend 10-15 minutes browsing the Web. Now check battery usage. Is Wifi your number on power drain? Here is what mine looks like.
Sent from my ASUS Transformer Pad TF700T using Tapatalk 2

For comparison I used my xoom tablet for 10-15 minutes doing similar activities and my wifi power usage was around 2%.
Also just an FYI I'm not in a strange wifi environment that creates any issues. I'm about 6 feet from my wifi hub and I noticed this usage today after work where wifi was between 50-60% of my total usage and that was on my work wifi.
Anyway I'd be really interested to hear if anyone is seeing a similar issue. I also created a ticket with Asus asking about this issue.

I hope you know that the stock battery stats are very unreliable. Under a better battery stats app, I've found that wifi isn't quite as consuming as apps, so I think the system stats are incorrect
Sent from my ASUS Transformer Pad TF700T using xda app-developers app

ethion said:
Ok I think I found an issue with my infinity and need some confirmation. Here is the test. Charge tablet to full. I remove from charger and spend 10-15 minutes browsing the Web. Now check battery usage. Is Wifi your number on power drain? Here is what mine looks like.
Sent from my ASUS Transformer Pad TF700T using Tapatalk 2
Click to expand...
Click to collapse
My wifi doesn't even show up. My unit is fine..

Mine has it. I doubt its that big of an issue anyway.
Sent from my ASUS Transformer Pad TF700T using Tapatalk 2

xRevilatioNx said:
My wifi doesn't even show up. My unit is fine..
Click to expand...
Click to collapse
Your is what I'd expect. In fact you got 91% after two hours. That is better than my xoom. This explains why some people claim good performance and battery life. Mine will be below 90% in like 30 minutes usage.
I think there is a wifi issue and this might be a way of identifying bad tablets. I'll see what the ASUS support people say and post it here. The bad news is this looks like a hardware issue...
Before I completely get excited can you make sure your wifi is always on. Go to settings, wifi, advanced, make sure keep wifi on during sleep is always.

xRevilatioNx said:
My wifi doesn't even show up. My unit is fine..
Click to expand...
Click to collapse
I was just noticing that you tablet doesn't have the asus icons for back, home, tasks. Are you using a stock infinity for your screen shot?!!

ethion said:
I was just noticing that you tablet doesn't have the asus icons for back, home, tasks. Are you using a stock infinity for your screen shot?!!
Click to expand...
Click to collapse
The screenshot is also missing the "ASUS Customzied setting" menu option on the left, right under Apps. Looks like either custom ROM or not an ASUS tablet perhaps.
For what it is worth, I have noticed the same issue with my Wifi eating up tons of battery. I haven't done any tests, but it certainly feels like my battery is draining pretty quickly with Wifi on. It is certainly draining much faster than my TF101....I would expect that to be the case to some extent because of the processor and screen upgrade, but not this much. There is another thread going on TranformerForums about the same issue. Someone reported that leaving their device fully charged with Wifi turned on overnight had drained it down to 19% by morning, with no use.
Not sure yet if this is a real issue, but it seems strange that Wifi would use significantly more battery than Screen.
-Chris

Don't rely on the battery usage screen. It's not like it's got an ammeter coupled to every battery drain. It just calculates percentages based on the information it got, it's all guesswork and needs lot of calibration to be correct. The reason WiFi is blamed as the major drain is probably that it's running all the time (and its power usage might not be calibrated for the battery usage screen). The stats won't know at all if e.g. the kernel gets stuck in an infinite loop and drains the battery...
Personally, I only trust the info the battery usage screen gives me about apps. If an app has a high percentage, it's probably not right. The rest of the breakdown is mostly bogus.

firetech said:
Don't rely on the battery usage screen. It's not like it's got an ammeter coupled to every battery drain. It just calculates percentages based on the information it got, it's all guesswork and needs lot of calibration to be correct. The reason WiFi is blamed as the major drain is probably that it's running all the time (and its power usage might not be calibrated for the battery usage screen). The stats won't know at all if e.g. the kernel gets stuck in an infinite loop and drains the battery...
Personally, I only trust the info the battery usage screen gives me about apps. If an app has a high percentage, it's probably not right. The rest of the breakdown is mostly bogus.
Click to expand...
Click to collapse
Well something is eating battery fast.. I have my xoom and my infinity sitting side by side right now and my xoom is at 80% battery after 2:30 hours on while the Infinity is at 62% after 2:41 on. So the infinity is draining battery about twice as fast as my xoom. And the xoom shows the top battery usage as the screen where wifi isn't even making the list.

ethion said:
Ok I think I found an issue with my infinity and need some confirmation. Here is the test. Charge tablet to full. I remove from charger and spend 10-15 minutes browsing the Web. Now check battery usage. Is Wifi your number on power drain? Here is what mine looks like.
Click to expand...
Click to collapse
There are already some threads that discuss this topic. The battery meter has a bit of a bug where it shows the WiFi % based on how long the wifi has been connected rather than how much actual power it has used. Mine does the same thing with 85% battery atm but it has been running off of the charger for 1d 13h and still has 37% left.
It is a battery meter issue and not an energy drain issue.

Xoom is now 68% after 3:30
Infinity is now 50% after 3:40

ethion said:
Xoom is now 68% after 3:30
Infinity is now 50% after 3:40
Click to expand...
Click to collapse
Well, the Infinity has more hardware to give power to.
However, my Infinity is at 62% after 10 hours... Most (about 80%) of that time, it's been sleeping (but on), though. Did you actively use both your Xoom and Infinity during the reported time?
How does the detailed battery usage screen (touch the graph in the normal battery usage screen) look? Here's mine (the gap is a reboot):

Google services... Back in my day, these botnets ran silently.
Sent from my FHD porn machine.

firetech said:
Well, the Infinity has more hardware to give power to.
However, my Infinity is at 62% after 10 hours... Most (about 80%) of that time, it's been sleeping (but on), though. Did you actively use both your Xoom and Infinity during the reported time?
How does the detailed battery usage screen (touch the graph in the normal battery usage screen) look? Here's mine (the gap is a reboot):
Click to expand...
Click to collapse
Yes I've been kinda using them. I've had them in google plus and swipe around every once in awhile.
I left for lunch and turned them both off.
infinity is now at 40% and xoom is at 55%. a bit over 6 hours since both were pulled off the charger. Screen has been on over 4 hours.

Here is the current status of infinity 37 percent
Sent from my ASUS Transformer Pad TF700T using Tapatalk 2

Here is the picture of my xoom at 53%

From just eyeballing the two graphs it looks like the infinity sleeps better where my xoom is staying active constantly. None the less when the screen is on the infinity consumes power quite a bit faster.
It is clear that the xoom does quite a bit better on battery life than the infinity.

Mine does this too, but battery life is solid
Sent from my Jelly Beaned GNexus

Battery Drain
I just got mine yesterday and the battery drain is unexceptionable. I fully charged it last night and then was off and on it this morning before going to work. After getting into the office it was more than 50% drained and before lunch it was well below 30%. I have the TF101 and it hasn't been charged in two days and it is still at 79% with everything turned on.
I have not had a chance to look into this but I find that amount of drainage excessive.
On a side note I pretty much just have the stock apps running on this. I did just do a cold boot so I will see if that helps at all.
Rex

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.

Battery on this device getting worse?

I've had this device since September and I've almost always been unsatisfied with the batter but now it's even worse! I charge it every day just for some slight use and I think it's unacceptable compared to what's promised. Anyone else noticing the same? I've lost 10%/hour and most of the time being idle.
Added a pic as a reference.
Also my device is locked and not rooted.
Sent from my ASUS Transformer Pad TF700T using xda app-developers app

Yeah my battery is starting to drain at a faster rate as well.
The performance have degraded on this tablet significantly as well.

...5.5hrs over 36+ ... not bad...
the_game_master said:
Yeah my battery is starting to drain at a faster rate as well.
The performance have degraded on this tablet significantly as well.
Click to expand...
Click to collapse
...
...
...
...
i gotta say i'm still impressed with mine compared to the 4hrs and 2kg of my xps1330 with 9cell !!!

kotidoti said:
I've had this device since September and I've almost always been unsatisfied with the batter but now it's even worse! I charge it every day just for some slight use and I think it's unacceptable compared to what's promised. Anyone else noticing the same? I've lost 10%/hour and most of the time being idle.
Added a pic as a reference.
Also my device is locked and not rooted.
Sent from my ASUS Transformer Pad TF700T using xda app-developers app
Click to expand...
Click to collapse
You could download better battery stat and see what app/process is using up your battery. Also download "wifi" toggle wiget, and turn off wifi, only turn it on when you need it, see you your battery improved. Some reported wifi drain battery heavyly..

kotidoti said:
I've had this device since September and I've almost always been unsatisfied with the batter but now it's even worse! I charge it every day just for some slight use and I think it's unacceptable compared to what's promised. Anyone else noticing the same? I've lost 10%/hour and most of the time being idle.
Added a pic as a reference.
Also my device is locked and not rooted.
Sent from my ASUS Transformer Pad TF700T using xda app-developers app
Click to expand...
Click to collapse
A couple of things to think about:
At home, on my Wireless N connection, my tablet lasts even longer than 1 day and a half with light use. I am currently on vacation in Hawaii, and have noticed a faster drain - and here I am on Wireless G. Could be a factor. So could your router itself.
Also, if you create drafts in GMail and save them, the Gmail app checks every 5 min for changes. Don't know why, but it does. I think it is by design.
Sent from my ASUS Transformer Infinity TF700 running Android JB (rooted) via Tapatalk

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