[Q] What kind of standby battery life do you get? - Barnes & Noble Nook Tablet

As well as the nook I also have an asus transformer and a bkackberry Playbook.
The Nook and the transformer seem to have similar standby time but I realised today that the Playbook knocks spots of of both of them. The playbook has been sat on the table in the living room for a good few days and it's been just in normal stanby with wifi still on (not sure if it shuts off when it sleeps). I picked it up expecting it to be flat only to find that it still had 30% power left!!! The nook just couldn’t do that length of time I'm sure, if I leave it it may last 2 days I guess.
What sort of standby time are you all getting? Do you set wifi to disconnect when it sleeps?

Woah, that's definitely NOT the standby time I get. I've set my Nook Tablet aside for a full day without use and the most I've seen it drop is 1-2% of its battery life. In fact, I haven't even charged it the past 1+ week and it's still around 70% (and that's with minor reading inbetween at low screen brightness and WIFI off).
I'm pretty sure I could set my Nook Tablet without touching it for a week straight and it'd still have a majority of its battery life like a champ.
The only thing I can possibly think of that's helping is my use of Juice Defender I have running in the background, but its main battery saving function usually involve s around minimizing WIFI activation as far as I can tell, and that is somewhat moot if I have it off.

yea I wish my NT could sit around not charging that long but really no complaints here. I get a good day out of it

Doctorword said:
yea I wish my NT could sit around not charging that long but really no complaints here. I get a good day out of it
Click to expand...
Click to collapse
Well from what little I know about the two tablets they both have the same base chipset and very similar screens so Nook 'should' be able to do the same as the Playbook so I'm definitely going to look into it further

well we need to find out what the secret is lol

I get days out of my NT when I don't use it, though even when I do use it I barely seem to put a dent in the battery percentage.
I'm so used to my old laptop and many phones over the years that I had to try my best to squeeze a day out of, that this thing just blows my mind sometimes.
My mom has a Transformer and she seems to have similar battery life to me, going on days without charging.

SG Pillar said:
My mom has a Transformer and she seems to have similar battery life to me, going on days without charging.
Click to expand...
Click to collapse
With my transformer it'sbecause eit dien'st sleep when connected to the dock, it's a known issue and if I got off my backside and contacted Asus they'd RMA the dock and fix it. If I disconnect the dock form the screen I get days out fo the screen even if I do use it a bit
Nook just doesn't seem to compare. Not yet anyway...

I'm on my fourth day, without a recharge. I haven't plugged it into anything since I started using ADBWireless. I can't estimate the screen-on time accurately, but I've read over 200 pages of memoranda and have been messing with my widgets and layout a fair amount. It's at 36% right now. I don't plan to plug it in until it dies (for science!).

anyone have any thoughts on this? I'm getting poor battery life as well. I'm running current widget and when I come out of idle there is quite a bit of current being drawn (200ma).
I'm rooted running go launcher.

Related

[Q] Battery life

Well, this question is for my lucky friends who have their new toys
Battery life is so good?
Post your test here!
Don't have screens for ya but battery life is more than adequate. My gf and I used it for about 5 hrs last night and it dropped to about 45%
(Games, xda, Netflix, and just tinkering around)
I'm curious what kind of battery life you folks are seeing, now that you all have had time to get some real world experience with the NT.
Thanks!
10 hours of continuous usage with 25% brightness.
Sent from my HTC Mecha using Tapatalk
Yea, the battery life and responsiveness of the device is definitely top notch.
I'm pissed as hell the bootloader is locked, but this device is an absolute steal for $250 bucks. Especially if you can manage to discount that price down.
Extremely responsive and awesome battery life considering I'm running max brightness and wifi 24/7.
I'm always surprised when I'm done using the Nook that it was still running. Granted, I ran it until it had only had around 20% left. But hey, if your sitting in one spot using your nook for more than ten hours, then you need to find something else to do. ^_^
Lucifus said:
... if your sitting in one spot using your nook for more than ten hours, then you need to find something else to do. ^_^
Click to expand...
Click to collapse
Good book, nice day, under a tree? Done that many times just reading off my PDA.
Thanks for the feedback!
The battery life is definitely adequate.
I can usually go 2 day without charging thus far. I keep brightness at ~20% or so (I can't stand brighter, it actually bothers my eyes).
I also use multi-picture-live-wallpaper and it doesn't seem to drain my battery at all.
I do some pretty heavy use of it as I am reading on it and studying for med school for probably ~6 hours at a time
Battery life is great. BN's numbers seem dead on.
Lasted the flight from San Francisco to Sydney
I'm getting around 10 or so hours of use at 2/3 brightness. Battery life is amazing on this. I charged it last night. Took it off the charger at 10am didn't touch it till 10pm tonight. It was at 99 percent then. I think it turns off wifi when it's sleeping.
Drewmungus said:
I'm getting around 10 or so hours of use at 2/3 brightness. Battery life is amazing on this. I charged it last night. Took it off the charger at 10am didn't touch it till 10pm tonight. It was at 99 percent then. I think it turns off wifi when it's sleeping.
Click to expand...
Click to collapse
Yeah, it definitely turns wifi off on its own when sleeping
Yeah Ill echo the comments here, battery life is absolutely superb and the responsiveness of the unit for the price is fantastic. Sadly its a case of if only B&N....to fully realize what the tablet would be capable of.
I have to agree that battery life is amazing on this thing.
I've got wifi turned off full time (to avoid updates from B&N) and the battery just seems to last forever. Granted you always use less battery when you're not going online, but still, it seems to really really last.
Frankly it's making my phone quite jealous.
Umm, my nt's battery isn't as impressive as i hoped. I use 25% brightness, wifi on, no fancy live wallpaper. I noticed for every few minutes of sjurfing, battery would drop a percentage or so. For usage of about 3hr withoit wifi, i would use up about 40 %.
Anything i could do to tune it up a bit? I do noticed amazon appstore is always running, so is clock, contact, tb, and my yahoo mail app. Any help is appreciated.
rvr350 said:
Umm, my nt's battery isn't as impressive as i hoped. I use 25% brightness, wifi on, no fancy live wallpaper. I noticed for every few minutes of sjurfing, battery would drop a percentage or so. For usage of about 3hr withoit wifi, i would use up about 40 %.
.
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Click to collapse
That sounds about what I'm getting and I'm wondering whether it's defective or not (still within return window).
edit: Probably normal - ran into some threads on B&N's boards where other people are averaging 5-7 hours. If I idle / read, I get about 1% every 8-10minutes or so so B&N's time estimates were definitely not "video," "browsing" or "games." Wifi on, installing or rebooting a few times, it drops to 5-6 hours tops between 100% and close to 0%.
My phone gets -way- more time, even reading.
the battery on this is great one of the biggest things going for it. better than my phone for sure.
For you guys with bad battery life, you might want to try better battery stats. Then check for partial wakelocks. That's usually the culprit on my phone. It seems weird some of you are getting half the battery life of the rest of us. Personally I haven't even turned wifi off at all, and also haven't turned my brightness below half.
It's in the google market, it won't show up on the nook. I downloaded it on my phone then used the app share my applications then back up to sd. Upload to dropbox. Then download it with dropbox on your nook.
Drewmungus said:
For you guys with bad battery life, you might want to try better battery stats.
Click to expand...
Click to collapse
I looked at this (and other battery programs), but wasn't sure what they did. Now I sort of do. I'll check it out! Wifi on definitely uses up at least 20-25%ish extra battery, and I *have* been moving a ton of stuff to/from sd cards and uninstalling and rebooting a lot, but the above did seem very short. Too bad there isn't a battery hardware test
Failing those applications it may be worth doing a full reset; Especially since most other owners are reporting MUCH better results.
Before I start nuking things around, I used BetterBatteryStats, check for partial wakelocks, and the highest % is from ActivityManager-Launch, which occupies 0.3% or 5minutes or so since I fully charged it.
Also, i noticed "Wifi Locked" is extremely high, like 89%, whereas wifi On is only 26%. What does that mean?
I'm not fully versed in how Android handles power management. So what should i be looking out for? Thanks!

Battery management when not in use

Hey!
I know that it's never a good idea to leave full or empty batteries just stay without use for too long. I don't use TF201 every day and I have it shut down when I don't use it, I am wondering how the battery should be managed and if any of you have any experiences with maintaining your previous devices, like TF101 or others, in similar conditions.
I charge the device after use and then it stays that way a day or two without use due to me not having lectures or enough time off work to play with it. When I do play with it, I don't use more than 20% of battery life and then I dock it with keyboard again (which charges it again even if it is turned off, which is really nice).
Are there any bad side effects of having the device powered off and not used for a day or two? Or letting the keyboard charge the device while it is powered off? Or leaving it in charged state for a few days?
Since I cannot change the battery on TF201, I am super OCD about the battery situation to make sure it works properly throughout the ~2 years I'll be using it.
Thanks!
I let it drain completely then recharge it. I don't power it off, just let 'er sleep in between work, driving, eating, etc.
Moderate usage will give me a couple days worth out of it. Charge during sleepy time, wake up, disconnect, repeat.
I found this article very interesting on batteries. Debunked alot of myths surrounding the type of battery we have.
http://forum.xda-developers.com/showthread.php?t=1168036
demandarin said:
I found this article very interesting on batteries. Debunked alot of myths surrounding the type of battery we have.
http://forum.xda-developers.com/showthread.php?t=1168036
Click to expand...
Click to collapse
Really good article, thanks!
Problem is that TF201 is a special puppy, since its dock recharges the tablet even when tablet is shut off. It's not recomended to keep the battery 'full' nor 'empty' and problem with TF201 is that it keeps tablet full or drains the dock while keeping tablet full, even if tablet is shut down.
I am just wondering if this behavior is bad for battery life in the long run if I don't use it for a few days (I certainly won't keep it 'on' for days and not use it, this will certainly make it go through more recharge cycles in the long run).
That article is good for managing a single-battery device, but since tablet with dock takes over a lot of charge-or-not decisions, it's a little different.
It's basically question about which is worse, going through definite amount of recharge cycles quicker because it is on and needs to be charged every now and then or letting it shut down and used when needed like a laptop.
Maybe I'm thinking too much and it doesn't really matter, but it just made me curious since I never had TF101, so I can't really rely on that experience.
We can buy the TF201 battery, can't we?
If yes, I don't think you should worry much.
Within a year or two, the battery should be still in perfect or near perfect condition.
If not, then buy a new battery.
By that time frame, most of us would have been buy a new tablet anyway
Make sense? no?
gogol said:
We can buy the TF201 battery, can't we?
If yes, I don't think you should worry much.
Within a year or two, the battery should be still in perfect or near perfect condition.
If not, then buy a new battery.
By that time frame, most of us would have been buy a new tablet anyway
Make sense? no?
Click to expand...
Click to collapse
TF201 battery is not user-replaceable. It needs to be done by ASUS or you're breaking warranty. I don't even think ASUS will sell these batteries.
kristovaher said:
TF201 battery is not user-replaceable. It needs to be done by ASUS or you're breaking warranty. I don't even think ASUS will sell these batteries.
Click to expand...
Click to collapse
Ok, thanks for the info, I did not know that.
But still, if I have a tablet, I won't keep it for more than 2 years most probably
And on my experience, for two years, battery will still be good.
gogol said:
Ok, thanks for the info, I did not know that.
But still, if I have a tablet, I won't keep it for more than 2 years most probably
And on my experience, for two years, battery will still be good.
Click to expand...
Click to collapse
Yeah, possible. I'll shake that OCD'ness off me then I suppose. I've just always had user-replaceable battery Android devices simply because I don't pay attention to how badly I mistreat the battery, I can always replace it. But with TF201 I have to pay some attention
Is there a way to signal the keyboard dock to start charging only when the tablet has 20% charge left?
I leave the dock connected all the time and the tablet is constantly being charged by the dock.
the lithium ion battery is fine you can let it sit for months and months, you can charge it every 5 minutes, you dont have to let it drain out or manage it just let it do its thing!

[Q] Battery life with CM7 on the NT

There's been mixed reviews of battery life in the CM7 rom for the NT as far as battery life is concerned, some are saying they've run it with moderate use since the day it was released and only used about 20 - 30% so far while others are saying battery life is terrible.
SO I thought I'd start a little poll to see what people are getting, I'm guess the battery drain is due to various software being installed so not really the OS's fault.
For me the Battery life is greatly improved over stock, for instance I took it of charge 10 hours ago, it's admittedly only been used for a few minute son and of during those 10 hours but it's lost the grand total of 4% battery in those 10 hours which I consider pretty good really.
Soi lets here what everyone thinks, remember to vote !
Battery life - improved
This is my third day on the CM7 alpha - battery life has been much better than before. Considering I have probably spent more time with the NT turned on over the last couple of days than I normally would, the battery used is less than normal. Previously I would use about 60% of my battery per day. Now I am using 30%-40% - and that includes downloading and configuring many, many applications.
I really think its much better than stock in my cm7 nt
No problems here. Take off charge around 6am and return to charge around 10pm with usually more than 80% left depending on usage.
Sent from my Droid Incredible ICS 4.0.3
I don't think mine has been on a charger for the last 16 hours or so, light usage, wireless has been off most of the time, and I use a task killer to kill things before I turn off the screen. Didn't power off, just put to sleep last night before bed, it's still at like 85%.
So far, it seems better than stock battery life to me, or at least no worse, and I have a lot more apps installed now.
Edit: Internal version.
It might help if folks said if they were running off SD card or internal memory when looking at battery life - I have the impression that the SD card reader on the NT is something of a battery vampire.
Internal CM7 since it was released.
Live wallpaper on Golauncher
wifi set to screen off-off
Brightness at about 60-65%
It's been off of charge for 4 hours 21 minutes this morning and I'm at 96%
Dolphin HD and Gmail have been running all that time.
Hasn't been out for long enough to really tell but my impression is that it's about the same as stock.
screen.
10char
dang69 said:
screen.
10char
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Click to collapse
Odd. Is that your aforementioned case with lots of standby? On my Vibrant, the Screen bar generally dwarfs all other bars even with significant standby time. Granted that's an apples-to-oranges comparison... (I don't have CM7 on my Nook Tablet yet - can't do a comparison between stock B&N and my Vibrant at the moment.)
PlacidCat said:
Odd. Is that your aforementioned case with lots of standby? On my Vibrant, the Screen bar generally dwarfs all other bars even with significant standby time. Granted that's an apples-to-oranges comparison... (I don't have CM7 on my Nook Tablet yet - can't do a comparison between stock B&N and my Vibrant at the moment.)
Click to expand...
Click to collapse
Yes. I don't really know what "standby" means. This use was about 40 minutes of checking email, weather news and etc followed by About 2 hours with the screen off then an hour of dinking around. Watched all the superbowl commercials, staying up on XDA and other forums with Tapatalk and learning things in CM7. I'd describe this as light use bordering on moderate.
dang69 said:
Yes. I don't really know what "standby" means. This use was about 40 minutes of checking email, weather news and etc followed by About 2 hours with the screen off then an hour of dinking around. Watched all the superbowl commercials, staying up on XDA and other forums with Tapatalk and learning things in CM7. I'd describe this as light use bordering on moderate.
Click to expand...
Click to collapse
Watching video or playing games can be quite intensive. Flash is probably the most intensive for video playing.
Keep a good eye in it over the next few days then cone back and post if you've noticed anything that makes it better or worse with battery life
Last I checked mine was going on 18 hours and at about 40%
One thing I noticed is that the charger for my Moto phone doesn't seem to charge the nook as well as the nook charger. I'll have to look at the nook wall wart and see if it's pumping out more juice. For reference the Moto charger is only 4.33W (5.1V at 850mA).
The nook charger is a 1.8amp charger
CelticWebSolutions said:
Watching video or playing games can be quite intensive. Flash is probably the most intensive for video playing.
Keep a good eye in it over the next few days then cone back and post if you've noticed anything that makes it better or worse with battery life
Click to expand...
Click to collapse
Will do.
10char
RadicalAns said:
Last I checked mine was going on 18 hours and at about 40%
One thing I noticed is that the charger for my Moto phone doesn't seem to charge the nook as well as the nook charger. I'll have to look at the nook wall wart and see if it's pumping out more juice. For reference the Moto charger is only 4.33W (5.1V at 850mA).
Click to expand...
Click to collapse
What kind of usage? Low, high, moderate? Just curious because my wife and I do a decent amount of Netflix (1-2 hours a day) and I don't have to charge more than every 3 days. This is with 1.4.0 rooted. I've been exceptionally pleased with that - power consumption in standby seems to be incredibly miserly with stock (most likely due to WiFi being turned off when the system is in standby).
Montisaquadeis said:
The nook charger is a 1.8amp charger
Click to expand...
Click to collapse
Ahh. That explains a lot. Looks like I should pack that in my bag rather than my Moto charger. I wonder if it'll charge my phone faster?
On the subject of the battery, I posted about an issue I encountered last night, here:
http://forum.xda-developers.com/showthread.php?p=22261812
Additional information: At the time, I was fooling around with a playstation emulator, which i'm fairly sure constitutes a heavy drain on system resources. Battery drain seemed appropriate for the level of activity.
Sent from my SAMSUNG-SGH-I997 using Tapatalk
Internal install, wifi off during sleep. Figure the end of the graph was about 19-20 hours or so of sleep. Before that was a constant internet, twitter, WWF session. Screen brightness is in the bottom 1/3rd of the slider.
I am going to beat the hell out of it tonight and will see how the battery holds up. Looks pretty solid just sleeping, so we will see what it can do under load.
So found that if your wireless location is turned on, it will wake your NT about every 5 minuetes. That's not a good thing
If anyone is seeing drains, i suggest using betterbatterystats to help track down the culprit.
10 char this
So Im getting horrible battery life with this now. Not really sure whats going on. I use to be able to leave my nook on standby for days and last night it was at about 30% woke up this morning and it was completely dead...

[Q] Standby battery usage iOS vs Android

Maybe someone can give some input about the following:
At work we have an iPad 1 and I've been monitoring it's battry drain in standby last week:
Full 6 days standby, with Wifi ON and not used in meantime:
battery went from 58% to 54%.
With my prime I get 2-4% during 1 night!
And that's even with Wifi turned OFF and docked (auto airplane mode app)
The dock looses about 1-2% each night
Why does the iPad have such crazy battery life in standby mode + wifi on? Is it all about good written software (iOS, drivers and apps)? Or is it hardware related? Or both?
In other words: will it ever be possible for an Android tablet to get such great standby time when ICS get more mature? Or is it already possible on other devices and lays the problem within hardware/drivers from Asus?
I really dislike having to use auto airplane mode, because I sometimes have to wait 5-10 second for wifi to get connected and ready. But with wifi turned on, the standby drain is even greater.
This didn't need its own thread. Should have posted it here.
http://forum.xda-developers.com/showthread.php?t=1534039
you might have some wakelocks
Sent from my sgs2 running cm9 using xda app
use better batter stats to see what's causing your issue. I get great standby battery life + wifi on. plus 2% drain isn't bad at all in one night. my prime can easily get over 20hrs. on a charge with off and on usage. I get about 10hrs. or so with moderate to heavy usage. about 9hrs. real heavy usage. battery life dependent on several factors. as far as standby goes, like the other poster said, you are experiencing system or partial wakelocks. cutting down the frequency of updates can help or solve this. everytime you asleep and device goes off from a notification, its woke up out of sleep. then eventually goes back to sleep. this is a repeated cycle which causes extra battery drain during sleep. because device never gets a chance to sleep long because its always being disturbed by notifications constantly going off.
demandarin said:
plus 2% drain isn't bad at all in one night.
Click to expand...
Click to collapse
I know that my 2% idle drain is quite good regarding to current prime and firmware/drivers, but how can a 2% drain in 8-10 hours be good when the iPad drains only 4% in 6 days (that's 144 hours!!) ?
The difference is HUGE, so that's why I wondered if it's bad coding in Android, drivers, Apps or maybe the used hardware that consumes just quite a lot more than iPad. Is 2% also common with other andoid tablets?
And if it's really software related: can and will it ever be fixed or at least reduced?
Edit:
When in standby my prime is always in "deep sleep" and I don't see any interuptions. But I sure will try better battery app.
Then again: this is all with wifi off and iPad had default settings with wifi on and still consumes way less
My ipad 1 have a great standby time too, comparing it to my Prime, My iphone 3gs has great standby time to comparing to my Galaxy Note. BUT it is too bad I didn't buy those stuff to be there looking pretty, I bought them to be able to USE them. If my stuff stays on standby a lot of time, seems like I really don't need it.
On my home network, I get about .3%/hour battery use on standby. I have wifi configured to stay on when the screen is off, and I have a number of apps that synchronize in the background (gReader, TweetCaster, email (X2 accounts), Gmail, a tasks app, calendar, etc.).
The worst standby that I get is on my work network, where I get between .5%/hour and 1%/hour. I believe it's something to do with the router at work, which also causes problems with my HP Envy 14 notebook. Note that the difference in standby life is absolutely consistent and quantifiable.
At .3%/hour, my Prime would last for 333 hours. At .5%/hour, my Prime would last for 200 hours. Worst case scenario is that at 1%/hour, my Prime would last for 100 hours.
Quite honestly, I'll take a Prime that lasts between 100 and 333 hours on standby while running all sorts of useful background tasks over an iPad that last for however long while running few if any background tasks. My Prime is more USEFUL to me that way.
And, even if the iPad runs the same sorts of background tasks that I've described here, 100 to 333 hours of standby is perfectly fine. Is it as good as an iPad? Clearly, not, in this case. But even so, it's also a distinction without much meaning.
why is it that all these people make ****ing mac/ios based threads?
serious if you don't like what you have bought... G T F O
p.s. stop the trolls ok? ipad ****ing sucks and what you claim is total bull**** anyway. 4% in 6days with wifi on dreams are there to be made.
fact: use that ****ty ipad turn on wifi and use it for 6-8 hours.
OMFG WHAT JUST HAPPEND? oh gaws....
now try with the prime
profit.
<edit>the topic of your thread... serious... your talking about 2 devices not even the actual software.. dip****</edit>
/end rage
Even if your using really clear, hard to see, mono filament, trolling is still trolling.
pvdwaal said:
Maybe someone can give some input about the following:
At work we have an iPad 1 and I've been monitoring it's battry drain in standby last week:
Full 6 days standby, with Wifi ON and not used in meantime:
battery went from 58% to 54%.
With my prime I get 2-4% during 1 night!
And that's even with Wifi turned OFF and docked (auto airplane mode app)
The dock looses about 1-2% each night
Why does the iPad have such crazy battery life in standby mode + wifi on? Is it all about good written software (iOS, drivers and apps)? Or is it hardware related? Or both?
In other words: will it ever be possible for an Android tablet to get such great standby time when ICS get more mature? Or is it already possible on other devices and lays the problem within hardware/drivers from Asus?
I really dislike having to use auto airplane mode, because I sometimes have to wait 5-10 second for wifi to get connected and ready. But with wifi turned on, the standby drain is even greater.
Click to expand...
Click to collapse
Its not an issue with Android because I can get 2 months on standby with my Nook Color running CM7. The tf201's standby time is likely due to things on the kernel level rather than Android.
dalingrin said:
Its not an issue with Android because I can get 2 months on standby with my Nook Color running CM7. The tf201's standby time is likely due to things on the kernel level rather than Android.
Click to expand...
Click to collapse
I was just going to post how crazy my nook color is with power consumption, but thats not the same level of processor that the Prime has.
Not sure if this has already been said? But iOS battery% behave very different than Android battery%. I noticed that when i got my first android device after using an ipod touch for a while. (that was a while ago so maybe things changed with iOS 5x never used that)
The iOS% will kinda adapt to your usage. If you play a 3d game on high brightness the battery% will go down pretty fast, but if you go back to standby they go up again. After some hour of gaming you can be down to 60% but after another one in standby it could go up to 80% again...
In general it feels to me like they lie "a bit". It could very well be that if you used said ipad it would drop to like 30% after 5mins of using. I found the way it behaves very annoying. But as I said that was on my ipod touch, maybe the ipad is different.
Android battery% are much more "direct" but also more accurate in my opinion. With my ipod I never knew how much juice is really left. With my phone or tablet now i know exactly what i can do until it shuts down.
That being said, i'm pretty sure there's still alot of room for improvement with the prime. The software is just an early version basically - all they did up to now is make sure everything works more or less and that its stable for most people. I'm confident the next patch will make things alot better in many aspects.
And i wonder how my prime will be like in half a year with a perfect custom rom
Ready2Mosh said:
I was just going to post how crazy my nook color is with power consumption, but thats not the same level of processor that the Prime has.
Click to expand...
Click to collapse
That's true, but isn't Teg3 and the new Pad line supposed to be fairly efficient?
With the majority of my time spent at the lowest clocks, the drain I get does seem kind of ridiculous. That opinion stated, here's another: the battery-life on the Prime is still fantastic. I can almost push it an entire work-week on one charge so long as I'm not trying to game or anything, that's a pretty stout stand-by for most electronics. The OG iPad just happens to be so underwhelmingly powerful that its standby is much greater.
I personally believe that to coax away the random locks/reboots they raised the voltage values so that we're drawing unneeded power; however, I for some reason have not ventured into my Prime to see what they have the values set to so I have nothing to back this up. Just a guess.
Ready2Mosh said:
I was just going to post how crazy my nook color is with power consumption, but thats not the same level of processor that the Prime has.
Click to expand...
Click to collapse
If its truly in standby/sleep then the processor should be essentially off. In the case of the Nook Color the primary CPU can power off entirely.
The issue is the dock, when mines not docked it can idle for over 60 days (according to battery widget app) and when it's docked I lose over 10% a night or more
d1ez3 said:
The issue is the dock, when mines not docked it can idle for over 60 days (according to battery widget app) and when it's docked I lose over 10% a night or more
Click to expand...
Click to collapse
The dock is not the issue, neither is Android and neither is the processor. It comes down to what apps you're running, live wallpapers, radios, etc. Or just good ol' fashioned faulty units...or poorly built ROMs/kernels.
I'm running stock, rooted .15 with performance mode on always. When I wake up in the morning, I unplug my docked Prime before I go to work. When I get home 10 hours later...dock is at 100% and Prime at 99%. That's with dock connected, performance mode, bluetooth wifi and GPS all ON and no "battery saving" apps of any kind running. And that's been consistent for the last two weeks. I DO, however, kill all apps in the recent apps menu. I don't force stop them or anything, just open up the recent menu and swipe them away.
The only time I've gotten battery drain was when I left an N64 emu, an SNES emu, Sixaxis and two other games running in the background. That ate about 10% battery or so in 10 hours.
I left my prime unplugged for 8 hours, wifi on, and it was at 99%. So I don't know what the OP is talking about.
Additionally, iPad doesn't have a good clue as to what real multi-tasking is like, and therefore doesn't update as much because it doesn't have services running in the background.
Android does have services running in the background. Give and take. You want your data always refreshed? What intervals? etc.
That's all configurable, so you really decide how long your battery lasts.
Advice to OP: Read more, get smarter, post less dumb crap.

Battery Life

I am seriously thinking about returning my Sony Tablet S.
I can't seem to get more than 3 hours out of this without a charge.
I play a full movie with wifi/GPS on and then i am down to 30%.
I do have it rooted and most of the bloat apps is gone. I check the battery indicator constantly and the biggest app using battery seems to be android so nothing is zapping my battery life.
Any ideas?
I think something is wrong with you're tablet, mine lasts for more then 8 hours without root.
So yes, return it and ask for a replacement.
bartbla said:
I think something is wrong with you're tablet, mine lasts for more then 8 hours without root.
So yes, return it and ask for a replacement.
Click to expand...
Click to collapse
same as that
Try this app
http://forum.xda-developers.com/showthread.php?t=1024867
If it doesn't work, send to service centre for a check.
Sent from my Sony Tablet S using xda premium
Try and adjust the backlight intensity
When I first used my tablet the battery seemed to be gone in no time. I have found that reducing the backlight manually has helped. I would say there was a definite difference.
Thanks for all the responses.
Problem is this is for my kid. He don't really have the patience to wait for charges every day.
He like to watch movies on the tablet and play some games here and there. Considering he only use it for 3-4 hours a day, this is insane how short the battery is.
I thought i will never say this...but another android guy bite the dust and cross over to the evil apple kingdom (exchanging for the ipad2 with 10 hour battery life).
jxl92182 said:
Thanks for all the responses.
Problem is this is for my kid. He don't really have the patience to wait for charges every day.
He like to watch movies on the tablet and play some games here and there. Considering he only use it for 3-4 hours a day, this is insane how short the battery is.
I thought i will never say this...but another android guy bite the dust and cross over to the evil apple kingdom (exchanging for the ipad2 with 10 hour battery life).
Click to expand...
Click to collapse
so we've all told you that it doesn't sound normal and that you should get much longer out of the device and your answer is "it must be android" rather than a faulty device.......
8 hours to 10 hours on mine, depending on what i do. with and without root, it doesn't change my battery life.
Mine about 8 hours
Had the same issue in the past... Delete all on USB and make a factory reset solved the problem. Now it run up to 8 hours.
Schrammi said:
Had the same issue in the past... Delete all on USB and make a factory reset solved the problem. Now it run up to 8 hours.
Click to expand...
Click to collapse
Same issue and fix here.
I have decent battery life ( 6+ hours) but one thing that makes me wonder is the idle time.
5 hours of screen time is less power consuming than the tablet being 20 hours in idle. Has anyone the same experience?
Yes. In my case it's the 3G modem. Turn it off generally and only on when you use it.
If I compare this case with my iPad I have to say, that the 3G modem in the sony uses much more energy in idle than in my iPad.
My Tablet is WiFi-only. And WiFi shuts down when the screen goes off.
Battery use:
Tablet idle ------------ 49% --> 15h 8m 57s
Screen---------------- 37% --> 4h 56m 31s
Is this strange behaviour or am I just paranoid since this is a totally different battery usage than on a phone( e.g Sensation)?
Bejtulla said:
My Tablet is WiFi-only. And WiFi shuts down when the screen goes off.
Battery use:
Tablet idle ------------ 49% --> 15h 8m 57s
Screen---------------- 37% --> 4h 56m 31s
Is this strange behaviour or am I just paranoid since this is a totally different battery usage than on a phone( e.g Sensation)?
Click to expand...
Click to collapse
I report the same type of stats...
Its using a lot of battery in sleep mode. But sometimes it doesn't, sometimes sleep mode last way longer but most of the time its about 25-30 hours in sleep mode and that is way too much...
I hope ICS will fix this, if not i may return mine.
And not 2g/3g/4g here, no celular radio here.. So, its not that.
---------- Post added at 08:11 PM ---------- Previous post was at 08:08 PM ----------
Schrammi said:
Had the same issue in the past... Delete all on USB and make a factory reset solved the problem. Now it run up to 8 hours.
Click to expand...
Click to collapse
USB??? you mean internal SD card (/mnt/sdcard)?
Yes. That's what I mean.
Sent from my iPhone using Tapatalk
Hmm. You do realise playing videos and having the wifi on in the background will cane the battery? Even more so if you're streaming said videos to your device via wifi. No doubt you've got the screen turned up full brightness as well?
Mine runs perfectly well and can last for a couple DAYS between charges, depending of course on how I use it.
Follow the tips provided by the others, you might get a fix. If not, get a new one from Sony. It's not a problem with Android - I suspect if you watch hours and hours of movies on an iPad you will still experience excessive battery drain because of the intensive nature of what you're doing!
Thanks for all the suggestions. If the tablet is for me to use daily, I probably would have condition the battery, try to delete all and then restart. However, it is for my kid and frankly it is unacceptable that a brand new tablet after watching one movie (just regular mp4 file i installed into the internal SD) is down to 30% charge.
I won't even start with the rest of the things i am disappointed with; the missing 6 gigs on the 16 gig, the screen little darker than i wanted (the screen protector I don't like at all), and frankly honeycomb in general is not that crispy and well developed.
I did end up getting a Ipad 2. After watching 1 movie, the thing still got 80% juice left....is night and day. Screen is sharper and brighter and most importantly it last more than a day without charge.
I don't want to hype about ipad here and i am still an android fan (i got 2 android phones), but the ipad really is WOW compared to the current corp of android tablets. Yes i am disappointed i won't be able to "tweak" the ipad like i can with droid pads, but Apple OS is so much better developed than honeycomb or ICS for that matter that really you can live without the tweaking.
For all you guys, with Wi-fi only (and 3G if you like the solution), before putting it to sleep put the device in flight mode. I've done it on mine and it was asleep for 4 days while I went out on a journey and when I came back only 30% of battery was gone...
I honestly can only fault the ipad in the sense that a media device, that for all intensive purposes is basically a more convenient option than a laptop, does not have flash support. Quick web browsing on tablets is great but it's useless without flash :S. Damn apple. Other than that I think the iPad is pretty great, especially now that the pricing for the new iPad has become alot sharper than in the price. Obviously to combat the success of Android tablets of late. But all I want out of a tablet is a bit of web browsing here and there, a couple games now and then and a nice digital photo frame to boot
I don't know about everyone else, but I have no desire to flash the crap out of my Sony tablet like I do with my SGS2. Now that I have root access it's doing everything I wanted it to do (and should have done!) from the start. So long is it's stable and responsive I'll be happy with it for a few years at least.
I was never happy with my tablet from day one but for me it was just software - sluggish and app incompatibility - a factory reset and root has fixed all that now. Never once have I had an issue with battery life. Sure as hell out-does any gameboy/ds/psp I've owned. Standby will last weeks if I don't touch it too.
So to those of you getting around 1-2 days standby time, something is seriously wrong with your tablet. There must either be a fault with your battery itself, or some app has gone rogue and just keeps it awake the whole time. i dont think any type of conditioning your battery will heed any results;
I didn't condition my battery at all when I got it and it's just fine. I played it with the 5% charge it had out of box till it died, got home, charged a bit, played with it till it shut off again, then when it got about 1/2 full just took it off charge and played with it again. Now it normally gets charged every friday whether it needs it or not.

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