Database Users

[Q] does the battery suppose to drain even in standby mode?

I am concerned about the battery life of my exchanged tab. The first tab I had has great battery life but had some sound issues that's why I replace it. But now I have this new tab but battery is draing fast even not using heavily. I am charging the tab whole night. I did not even has email account setup so its not retrieving any emails. Any suggestions to improve battery life please?

Is your wifi and GPS running at all times?
If you have rooted the tab try using an overclock tool to reduce the load, this should increase the battery life. Until then we are gonna have to wait for a custom honeycomb ROM that increases battery life. If its as bad as you say it is I would try another tablet and hope you dont get another thats messed up.
GL

No the tablet is not rooted but its factory unlocked. How do I know if the tablet is rooted?

It would only be rooted if you rooted it

Mine barely drains with screen off and Wifi on with everything syncing at the same time.. I can go like 2 days average use on my tab so far.

so it seems like there is an hardware issue. Diversion is your tab unlocked or locked?

Diversion said:
Mine barely drains with screen off and Wifi on with everything syncing at the same time.. I can go like 2 days average use on my tab so far.
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Same here. Too bad it takes forever to charge tho.

dazz87 said:
Same here. Too bad it takes forever to charge tho.
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Click to collapse
Forever is an understatement.

I have different battery experience than the OP. I keep my wifi on constantly. On standby with little use (~0.5 hour today), the battery went from 100% to 93% since morning to midnight.

I think it's your unit. I use mine for about a total of 4 to 5 hours a day with wifi and bt at a fixed 75% brightness and when it goes into standby I only lose about 1% every 2 hours. Usually by the end of the day I'm at about 70% battery with a low of 50%.
Sent from my GT-P7510 using XDA Premium App

Switch launchers I'm running adw ex (LPP had a number of fc's that I didn't like).
Sent from my GT-P7510 using XDA Premium App

Have you checked the battery usage to see if any apps are using a lot of battery? (Settings -> About Tablet -> Battery Use)
Mine was at 98% when I went to bed last night and at 94% about 7 hours later this morning. That's with wifi, bluetooth and GPS on, and GMail syncing (but not much else).

all of you guys whose battery has no issue do you guys have tab with locked or unlocked boot-loader. Mine is unlocked and i think because of that battery is discharging fast. Snoopstah i check the settings battery use is screen, browser (which is closed), wifi, android OS thats about it. Please let me know what should i do i have one more day to exchange it.
Thank you all

Exchange it. The battery life in standby mode is stellar. Mine's unlocked too and I lose 2% all night with everything on.

The bootloader on mine is unlocked, and came that way. In either case, that should not affect battery life, though I could imagine how rooting would possibly allow you to install or turn on something that would drain your battery faster (and is left off by default).
Just as an aside, what brightness setting do you guys use on your tabs? Somebody mentioned 75% and that seems super bright to me. I keep my brightness at around 20% or so. Auto brightness is way too dim on this thing. I look forward to some development action on this thing, the ability to customize the auto-brightness levels in CM7 on my Captivate is really awesome.

I have the same battery draining. I can only get 6 hours of straight usage with 20 on brightness. I'll exchange mine today. My zoom can last 8 hours straight of usage

tabing said:
all of you guys whose battery has no issue do you guys have tab with locked or unlocked boot-loader. Mine is unlocked and i think because of that battery is discharging fast.
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I have no battery issue when in stand by mode and my tab is unlocked and the wifi policy is set to stay on. I drain about 3% per 7 hrs which is excellent.

[Q] Transformer standby time

Hi everyone
My question is for techy people in this forum.
According to you why standby time of TF is so bad when compare to ipad2.
Is this software or hardware related problem?
Is it fixable?
Thank.

kivawolf said:
Hi everyone
My question is for techy people in this forum.
According to you why standby time of TF is so bad when compare to ipad2.
Is this software or hardware related problem?
Is it fixable?
Thank.
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Click to collapse
Software problem, IIRC mainly related to the keyboard dock (dock will drain battery when it should be asleep). I still get several days of standby time, which is far more than acceptable. I don't need 2 week standby .
This post needs to go in the proper forum, however.

Gary13579 said:
Software problem, IIRC mainly related to the keyboard dock (dock will drain battery when it should be asleep). I still get several days of standby time, which is far more than acceptable. I don't need 2 week standby .
This post needs to go in the proper forum, however.
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Click to collapse
Sorry, I though this is related to development.
So you are saying that honeycomb is bad by design to battery? Because all honeycomb tablet have the same problem.
There is some thing about standby mode that consume for power than ipad, but why?
It is nice that the tablet does not run out of battery when you really need it.

After leaving my Transformer untouched for about 4 days last week, the battery was sitting in the 80-ish percent area. Seems like pretty damn good standby time to me.

Standby time depends on whether you have the pad docked to the keyboard or not.
If you keep the two separated the standby time is pretty good although I haven't timed it.
If you keep the tablet attached to the dock then standby time for the dock is greatly reduced as it seems to keep charging the tablet until it drains to zero even if you started with a fully charged tablet. It is a very annoying problem that no-one seems to have found a cure for yet. If you let the dock discharge fully some people have found it impossible to charge again.

I am comparing TF and ipad2 without the dock for the obvious reason.

And how long is the iPad 2 standby time?
After using a HTC Desire with poor battery life for the past year I find the standby time for the Transformer to be fantastic. I'm able to use it a bit each day for at least about 5 days. Nothing heavy, but the fact that I can pick it up after a few days of no use and it's still got a decent charge is impressive to me these days.

never used an ipad/2 for extended period of time but stnadby time on the asus is pretty good. what i find helps greatly is if you plan on leaving it in standby for a awhile, then its best to turn off WiFi as it'll help save battery life even more.
i had it fully charged this morning and unplugged it to take to work. Unplugged it around 730am, powered it on and turn off wifi and let the screen timed out. Finally turn screen on at like 130p and the battery still shows 99%

My stand by time was horrible on stock 3.1 I don't why. Once I rooted and installed Prime and OC kernel at 1.2ghz I get much better standby time. Almost comparable to my Ipad 1. Battery life seems to be better too as compared to stock 3.1

Midda said:
After leaving my Transformer untouched for about 4 days last week, the battery was sitting in the 80-ish percent area. Seems like pretty damn good standby time to me.
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Click to collapse
mine is stock 3.1 and never lasts that long, my ipad 2 lasts multiple weeks!

A|ex said:
mine is stock 3.1 and never lasts that long, my ipad 2 lasts multiple weeks!
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Click to collapse
let the wifi shut off when the tablet goes to sleep, it's something iOS does by default and turning off radios will make the battery last a lot longer.
also, if you are going to leave wifi connected, the less widgets and applications you allow to pull data (or adjust the intervals they are set to sync), the longer your battery will last. iOS also is a very passive OS so when you put an ipad to sleep, everything is basically shut down, android allows apps to keep running if you have set them to sync data (ie, twitter, facebook, etc) which will also consume more battery.
the dock issue is an issue. but undocked, mine will last a week or so with light/moderate use, then again i generally charge it at night anyways.
and yes, this should be in general section, it has nothing to do with development for the device, you are asking a general question about the device/platform.

I just took my transformer on a 5 day trip, fully charged to start with, and i didn't bring the charger. I probably only used the tablet 3 times for 15 minutes, and the rest was standby. When i got home and plugged it in, it was down to 2% battery, just about to die. That is just unexceptionable. And iPad 2 under slimier circumstances would have consumed maybe around 20% of it's battery life?
I read somewhere that the new samsung galaxy tab 10.1 is rumored to have up to 75 days of stand by. I don't believe that at all, but if they are claiming that, i would assume that i would last much longer than 5 days. (plus i played with one the other day in best buy and it just feels awesome in the hands)
conclusion: hopefully future updates will help out with the transformer's battery life and stand by time.

Thread re-opened and moved to General.
Mark.

Which is your WIFI policy?
I have it on WIFI off when screen off, and stand-by time is pretty good. I guess that if you need WIFI always on it will adversely affect your battery usage.
Regards.

Its not a Honeycomb issue its a Asus issue. I have a Samsung 10.1 and the stand by time is much better then the Asus. The stand by time for the 10.1 is about 7 hrs and it eats up only 3%. Also, the wifi policy on the 10.1 is set to stay on when it goes into stand by mode. My TF wifi policy is set to turn off when the screen is off and it still eats more battery life then the 10.1. I pretty much have the same apps on both tablet.

Yeah, I have mine set to turn off the wifi when the screen is off (pretty sure this was the default setting), and my standby time is much better than I was expecting (as per my post on the first page). Given the drain I've experienced, I'd expect it to last 2 weeks or so on standby, which seems pretty good to me.

It could be that your wifi disconnect policy is not set to go into standby when the screen goes off. Don't worry, it waits 15 minutes before actually turning off the antenna. But there is a bug where it defaults to "Never" after being charged (including the dock), or after a reboot:
http://code.google.com/p/android/issues/detail?id=16720
I get a few days out of mine, but I don't give it much chance to be standby, I use it regularly in the evenings.

Hi,
I am sorry, I think I didn't well explain it.
It is the fact that TF has less standby time than ipad2.
But, my question is more about Technic.
Ipad2 does email sync with wifi always ON beat TF wifi off.
But why? There is some app working in background? Why it need to be in standby mode?

I still hear email notifications even with Wifi policy set to turn off when screen is off. Definitely a software problem. In regards to the dock issue, ASUS needs to make some changes to Honeycomb so when it knows the dock is plugged in, the power saving features still kicks in when on standby despite the tablet being charged. It probably assumes the dock is actually a wall charger and doesn't kick in any power saving features. (default behaviour set by Google)

I think the main question in this thread needs to be why are people leaving their Transformers in standby for soo long!!
USE YOUR TABLET EVERY SECOND GOD GIVES YOU AND YOU WONT CARE ABOUT HOW LONG IT WILL LAST WHEN ITS ASLEEP
Mark.

[Q] Terrible battery performance?

Hi Guys,
How is your battery performance going? We have three 64GB 3G Lenovo tablets in our office and we are struggling to get two hours usage out of any tablet. Even just leaving them in standby mode will drain them fast (less than a day). I have the acer iconia A500 and can leave that around for days and still have some juice when I pick it up again. Any idea why battery life is terrible on the Lenovo? We are all running different apps. Mine is pretty much just running stock with a few ebook reader apps.
Cheers,
SB

Something is wrong with them if the battery life is that poor. Presumably with the hardware if you're running things mostly stock. Strange, though, that it'd be all of them and not just one. Mine gets 8 solid hours of medium to heavy use, no sweat, and other people have indicated theirs get about the same. You might want to contact Lenovo's tech support (though just a word of warning, they have kinda lame tech support nowadays...).

I've got a 32GB no 3G tablet that continues to surprise me with it's battery life. I'd read plenty about folks with crappy recharge and usage times.
Mine will still have the same charge the next day if I don't put it in the dock and I generally get 7-8 hours out of a full charge, even over the period of a few days.
The old 'cell-standby' battery drain disappeared a while back. Don't know why. Don't miss it at all.

Under normal use for me (sketchbook pro, browsing, and an occasional game) I get about 8-12 hours of use (basing that on the screen on %), with 3-4 days between charges. Something is certainly up with yours, what is listed under settings>about tablet>Battery Use?

Info
Tablet 1:
Battery 69%, 7 hours on battery, maybe 20 minutes use. (Mobile broadband turned off)
Screen 39% (on auto brightness)
WiFi 26%
tablet Idle: 23%
Cell Standby 7%
Android OS 7%
The other two are not available, but as a colleague ran out the door, he mentioned that his cell standby was 33% despite mobile broadband being turned off.
Thanks for your feedback so far.

Mine (16GB version) lasts for 4 hours when it's REALLY busy, that means when I stream videos over wireless.
Otherwise...after a full day of normal usage I'm back from 100% to 40%.
Anything else I think is not acceptable..I suggest you guys have your tablets replaced.

Wait, I just had a thought. Are you guys using the keyboard folio with the tablets? If so, there's something you should know. After putting the tablet to sleep, you can't close the folio for another 10-20 seconds afterwards. Otherwise, the optical trackpoint ends up detecting motion from the tablet being on top of it and it wakes the tablet up repeatedly while the thing is sitting closed. So you have to put the tablet in sleep with the folio still open, let it sit until it goes into deep sleep, wave your finger over the trackpoint to make sure it has (after 10-20 seconds), THEN close it up.

my battery is good on standby (with wifi sleep).
Your battery drain is because of cell network. use airplane mode !

I RMA's 2 of them with the same symptoms, took all day to charge, discharged way to fast they ended up having both bad motherboards and bad batteries. I called up lenovo sent them in and had to wait about 3 weeks for the parts to come in, but they have been working incredibly well now.

noefects said:
I RMA's 2 of them with the same symptoms, took all day to charge, discharged way to fast they ended up having both bad motherboards and bad batteries. I called up lenovo sent them in and had to wait about 3 weeks for the parts to come in, but they have been working incredibly well now.
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That sounds very similar to the three we have. 6-8 hours to charge. Less than an hour of use to discharge. Less than 10 hours on standby to discharge. Lenovo suggested a factory reset (ha ha) to fix the problem. I'll humour them for the weekend.

Do I Have a Battery Problem?

I have had my Note for 9 days now and wonder if my battery may have an issue. Yes the phone is entering deep sleep, No I don't have any specific app that is running it dry. Screen takes most of the juice. I have it set at automatic brightness. Everything is off. It does auto sync. Signal is fantastic. I can hardly get 3/4ths of a day. I usually spend 30 minutes on the phone. 30 emails, 2 hours browsing, 30 minutes on tapatalk. This has always been my pattern and coming from a Motorola photon I always made the day easily. I'm on ISC (stock) not rooted just plain old stock. I'm thinking maybe a battery problem? What do you all think? Thanks for your help.
Sent from my GT-N7000 using Tapatalk 2

swid441 said:
I have had my Note for 9 days now and wonder if my battery may have an issue. Yes the phone is entering deep sleep, No I don't have any specific app that is running it dry. Screen takes most of the juice. I have it set at automatic brightness. Everything is off. It does auto sync. Signal is fantastic. I can hardly get 3/4ths of a day. I usually spend 30 minutes on the phone. 30 emails, 2 hours browsing, 30 minutes on tapatalk. This has always been my pattern and coming from a Motorola photon I always made the day easily. I'm on ISC (stock) not rooted just plain old stock. I'm thinking maybe a battery problem? What do you all think? Thanks for your help.
Sent from my GT-N7000 using Tapatalk 2
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I've only had my note a couple days. I've gotten about 10-12 hours out of it both days. But that was with what I would call moderate to less then moderate usage. A little web browsing and facebook, probably less then 2 hours total. Maybe 20-30 texts and reading emails for maybe 30 minutes and 10-15 minutes of calls. I'm not sure what to expect, I am coming from a rooted HTC evo which I ran a lot of custom roms/kernels on, so I got great battery life with it. But I don't remember how it performed stock. The Note gets me through my work day, but not much more.

Charge the battery to full.
Let it drain completely (till it turns itself off).
Charge the battery to full once more.
I don't know the science behind it, nor does everyone benefit from doing this. (Something to do with calibration of the battery) but I do this after every major update, or new phone. I'm currently sat on 44% battery after 24hours usage (Moderate, certainly not heavy usage).
You have to remember the note will consume a large amount of battery simply because of its screen size (As you've noted its the biggest offender).
Someone with more experience/knowledge will hopefully be along shortly to give you better more informed advice but this is what I know from experience.

Normally what I have seen is I get approx near
4 hours of battery life (screen on time)
Sent from my GT-N7000 using xda premium

Batterylife on samsung ics (XXLPY) is terrible if you compare it to gingerbread. It is nearly cut down in half. I guess touchwizz has gotten more hungry than before or samsung has altered ics so much that the advantages are gone.

davexeno said:
Charge the battery to full.
Let it drain completely (till it turns itself off).
Charge the battery to full once more.
I don't know the science behind it, nor does everyone benefit from doing this. (Something to do with calibration of the battery) but I do this after every major update, or new phone. I'm currently sat on 44% battery after 24hours usage (Moderate, certainly not heavy usage).
You have to remember the note will consume a large amount of battery simply because of its screen size (As you've noted its the biggest offender).
Someone with more experience/knowledge will hopefully be along shortly to give you better more informed advice but this is what I know from experience.
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Click to collapse
I do this method every 2 or 3 months on all my devices (iPod, phone, Laptop) so that the percentage or battery shown on the devices is more accurate. I read somewhere that since most of us charge out devices before battery dies completely, like we charge it when its 80 or 60 or even 20 instead of charging it when it completely dies, doing so makes the accuracy of the percentage very low but we can't help it but to charge it at what ever percentage for various reason thus, I always drain all my battery on devices completely than charge it full before using (minus the first full charging). Any ways if your ICS it seems to be a bug, it cannot be fixed until a new update.
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Do the charge/drain cycle.
I've done this and improved the battery life immensely.
Currently my note has been on for 3d 21h 16m 1s and has 11% charge left - okay so it hasn't been used much over the weekend but that not a bad standby time.

SGN 10.1 battery endurance is phenomenal !

Yesterday we had a day grey in grey and I started my morning as usual with my SGN 10.1
Emailing, Newspaper reading, some drafting for my next lectures, updating apps and then I found some really funny cabaret streams .......
Well, my Note was constantly on and streaming YouTube and some other sources
What shall I tell You: just in time I went to bed it was down to 5%
14 hrs !
No other tab can beat THAT :laugh:

I found a quick way of gaining 5 hours battery per day: I bought my 5 yr old son a Galaxy Tab 2 (early xmas present). Now my note 10.1 lasts me all day, every day It even works with my phone, a Note 2
My note 10.1 has so far been running for 23 hours and 10 minutes and has 26% battery remaining. It's definitely on a par with my previous tablet, an ipad 3 :good:

Last week, took mine off the charger Sunday morning and didn't put it back till Friday night. I didn't use it much, just about 4 hours of screen time. Total time on battery was 134 hours 27 minutes. Still had 55% of the battery left. That standby time if phenomenal.

yeah my last charge was 5 hours 40 mins screen on time and more than 13 days standby. Battery was at 34%. It uses next to no power on standby, absolutely amazing.

Sent from my GT-N8013 using xda app-developers app

I use my Note 10.1 on two day cycles. I am in college and take all my notes with it. I can use the tablet as much as I want and I get two days of battery out of it.

I agree. I'm coming from Asus Transformer Infinity and SGN 10.1's battery is beyond belief. It seems like it's running on nuclear energy. Amazing for such a light tablet.

aydc said:
I agree. I'm coming from Asus Transformer Infinity and SGN 10.1's battery is beyond belief. It seems like it's running on nuclear energy. Amazing for such a light tablet.
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Click to collapse
tbh, it feels as though it runs down a bit quicker than my old transformer prime tf201...
idk though

My best:
Sent from my GT-N8010 using xda app-developers app

AndroHero said:
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Click to collapse
I win
Sent from my GT-N8010 using Tapatalk 2

guys why my screen always say it uses 75/80% when i look at battery usage ?
it makes my battery drain very fast

The amount of time your screen is on is the usage percentage shown eg if you tablet is on for 10 hours and out of that u were using it for 8 hours then the percentage would be 80
Screen is the biggest battery eater which is the case with any device so it effects your battery life the most

samir_a said:
The amount of time your screen is on is the usage percentage shown eg if you tablet is on for 10 hours and out of that u were using it for 8 hours then the percentage would be 80
Screen is the biggest battery eater which is the case with any device so it effects your battery life the most
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Click to collapse
thank you samir for fast respond :good:

samir_a said:
The amount of time your screen is on is the usage percentage shown eg if you tablet is on for 10 hours and out of that u were using it for 8 hours then the percentage would be 80
Screen is the biggest battery eater which is the case with any device so it effects your battery life the most
Click to expand...
Click to collapse
I think its what percentage of your battery it has used, not the screen uptime vs total uptime
Sent from my HTC Glacier running CM7

I got mine yesterday and charged it, hardly did anything with it except download and play a game for less than 10 minutes and have a little doodle with sketchbook pro then left it on standby over night then did a little browsing this morning.
Found the wifi to be slow and sluggish and wouldn't even show all images even though my broadband is 100mb speed.
The battery lasted 13 hours, don't know how long it would last if I'd actually used it a bit more cause it seemed to go down pretty fast even on wifi bout the same life as my s3.
Hardly call that phenomenal.
I'm really disappointed to be honest after reading all the reviews.
Sent from my GT-I9300 using xda premium

Samsungnooby said:
I got mine yesterday and charged it, hardly did anything with it except download and play a game for less than 10 minutes and have a little doodle with sketchbook pro then left it on standby over night then did a little browsing this morning.
Found the wifi to be slow and sluggish and wouldn't even show all images even though my broadband is 100mb speed.
The battery lasted 13 hours, don't know how long it would last if I'd actually used it a bit more cause it seemed to go down pretty fast even on wifi bout the same life as my s3.
Hardly call that phenomenal.
I'm really disappointed to be honest after reading all the reviews.
Sent from my GT-I9300 using xda premium
Click to expand...
Click to collapse
Somethings up with your device maybe........ive tested mine a few times, constant use, thats, from 100% untill the 5% warning, mostly browser and youtube......5min break here, 5min break there...........on average 10h MINIMUM of CONSTANT use.........if your dropping 13h without much use, then somethings up with your device and might be worth asking in the q&a thread for help
Are you using full brightness?

banderos101 said:
Somethings up with your device maybe........ive tested mine a few times, constant use, thats, from 100% untill the 5% warning, mostly browser and youtube......5min break here, 5min break there...........on average 10h MINIMUM of CONSTANT use.........if your dropping 13h without much use, then somethings up with your device and might be worth asking in the q&a thread for help
Are you using full brightness?
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Click to collapse
Probably just needed a full charge as I only charged it from half way as it came half charged and if that doesn't work I'll do a full discharge and if that doesn't work I'll send it back
Full brightness is too high for me and auto is too low so had it at less than half way.
Only really got it so could use it to take out with me and do some paintings but was worried about it switching off that's why not happy.
Thanks for your reply, really like this tablet and it really is what I thought it would be but if it hasn't got the battery then it's not good.
I'll see how it goes.
Sent from my GT-I9300 using xda premium

Make sure you set WiFi to turn off when the screen is off.
Odd though that the WiFi was slow. It makes me think something is wrong with the WiFi itself that's causing problems.

Samsungnooby said:
Probably just needed a full charge as I only charged it from half way as it came half charged and if that doesn't work I'll do a full discharge and if that doesn't work I'll send it back
Full brightness is too high for me and auto is too low so had it at less than half way.
Only really got it so could use it to take out with me and do some paintings but was worried about it switching off that's why not happy.
Thanks for your reply, really like this tablet and it really is what I thought it would be but if it hasn't got the battery then it's not good.
I'll see how it goes.
Sent from my GT-I9300 using xda premium
Click to expand...
Click to collapse
Personally, I've noticed that the s-pen digitiser, when it is switched on, drains a considerable amount of energy. So do not expect extreme battery life if you use a lot the s-pen. Anyway, do check that the energy saving option under "Options - S Pen" is ticked. This way the digitiser will be off when the stylus is in its receptacle. This will save a good amount of battery when you're not using the pen (provided you insert it in its receptacle). Of course, this setting will have no effect whatsoever while you're using the pen.
In any case, a tablet like this is full of features and components that are potential battery killers, so how long the battery lasts, it's really up to how the owner uses it, and not only how much. For instance, I may be surfing the internet and checking emails all day long without using the pen, and consider it heavy use. How long will the battery last in such case? 15 hours? Ok.
Now, a seemingly opposite case could be this: I may have the tablet constantly standing by, but with the pen off its receptacle. Since I have never used the tablet, I have full right to swear that my usage of the tablet is extremely light. Well, only because I've left the pen out of its receptacle, my battery will run flat in just about 13 hours or so. And what's more confusing, is that if I go checking the battery stats, I will see no trace of the pen being the responsible for such a high drain, so I probably will end up getting the (wrong) idea that the battery life of this tablet is extremely poor.
Another case, among the many, is when the tablet tries to sync using the 3G connection, but gets no answer from the network because of problems of the mobile operator network (server not responding). This causes the 3G radio to remain constantly on and drain the battery very fast. Again, it is very difficult to understand the reason for such a quick discharge. Such an issue happens in certain areas of my city with Vodafone, for instance. When I go to that areas, I have to take care to switch off 3G data connection, or else my battery will be empty in a matter of a few hours.
IMHO the problem is, that android os is very incomplete when it comes to providing information for analysing power consumption, and this has always been the cause of big confusion and frustration.

JuniorGG said:
Personally, I've noticed that the s-pen digitiser, when it is switched on, drains a considerable amount of energy. So do not expect extreme battery life if you use a lot the s-pen. Anyway, do check that the energy saving option under "Options - S Pen" is ticked. This way the digitiser will be off when the stylus is in its receptacle. This will save a good amount of battery when you're not using the pen (provided you insert it in its receptacle). Of course, this setting will have no effect whatsoever while you're using the pen.
In any case, a tablet like this is full of features and components that are potential battery killers, so how long the battery lasts, it's really up to how the owner uses it, and not only how much. For instance, I may be surfing the internet and checking emails all day long without using the pen, and consider it heavy use. How long will the battery last in such case? 15 hours? Ok.
Now, a seemingly opposite case could be this: I may have the tablet constantly standing by, but with the pen off its receptacle. Since I have never used the tablet, I have full right to swear that my usage of the tablet is extremely light. Well, only because I've left the pen out of its receptacle, my battery will run flat in just about 13 hours or so. And what's more confusing, is that if I go checking the battery stats, I will see no trace of the pen being the responsible for such a high drain, so I probably will end up getting the (wrong) idea that the battery life of this tablet is extremely poor.
Another case, among the many, is when the tablet tries to sync using the 3G connection, but gets no answer from the network because of problems of the mobile operator network (server not responding). This causes the 3G radio to remain constantly on and drain the battery very fast. Again, it is very difficult to understand the reason for such a quick discharge. Such an issue happens in certain areas of my city with Vodafone, for instance. When I go to that areas, I have to take care to switch off 3G data connection, or else my battery will be empty in a matter of a few hours.
IMHO the problem is, that android os is very incomplete when it comes to providing information for analysing power consumption, and this has always been the cause of big confusion and frustration.
Click to expand...
Click to collapse
Ah think that was it thanks had the battery saving in pen unticked, wasn't sure whether to tick it or not.
I only have the wifi as got 3g on my phone so don't need it.
Main purpose bought it for was the pen but now have that ticked when not using it should make a difference
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