Hey all bought a vega from pc world and for the price(£199)im more than happy with it,if there's one negative I've come across with the vega then it has to be battery standby drain.I fully charged my vega and used it for about 3 hours,watched a film and a bit of web browsing anyway when i put the tablet into standby(with airplane mode on)it was at 39%.Then nine hours later i switched it out of standby and it was at 30%.Hmmm i thought that's quite a big drop in just 9 hours,anyway i played one 2minute video and with the vega still showing 30% i again put it into standby.12 hours later i awoke the vega again expecting the 30% to be maybe down to about 20% or 18%. But no it was at 7%.so basically in the space of 21 hours with no usage at all(one 2 minute video) the vega had gone from 39% down to 7%...compared to my galaxy tab which in the same timespan with the equivalent usage would only lose about 3% im thinking has the vega got a faulty battery or something.Maybe this is just one of them things,you get what you pay for,the galaxy tab cost me double the price of the vega. Like i say for the price the vega is pretty impressive but the standby drain is defiantly a major downer.I've now started to charge my vega overnight no matter what power I've got left on it.
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I have the exact same problem on both my Mobii's (same as vega) it looses like 1-2%/Hour on standby and I have seen some other ppl having the same issues, so sadly i guess it is more or less normal for the vega/Mobii to drain like this.
I have solved so that I power it down when i am out and about and dont have a charger near.
Hi slipurson Even turning the vega off doesn't help for me.When i seen how poor the vega was in standby i decided that when i'm not going to use the vega for a while I'll power it off.One night i had 42% left so knowing i wouldn't be using it for a good 12 or so hours i switched it of,when i turned it back on it was showing 17%.
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This might be wrong, but I recall reading that the Android phone function is enabled on the tablets, and this can cause a hit on the battery.
Not sure if you can fix this with a hack or with a new ROM, however (I've been putting up with it so far)
atomickarma said:
This might be wrong, but I recall reading that the Android phone function is enabled on the tablets, and this can cause a hit on the battery.
Not sure if you can fix this with a hack or with a new ROM, however (I've been putting up with it so far)
Click to expand...
Click to collapse
With the Corvus ROM the creator provides a phone removal set of files to install through Clockwork. However when I applied them I got a message on each boot about some process or other not working. I had to install the ROM again over the top to remove that message.
Both my wife's and my Vega also drains when in standby but not as much when fully powered off. As neither of us used the original ROM I do not know if it is caused or made worse by any of the modified ones or just a problem of the hardware.
We are both using the nightly builds of CM 7 now. Whilst I can't be sure as yet, having only recently changed over, the battery drain issue might not be as bad, but that ROM also has all the dialler and phone components remaining.
Hi vimesUK The battery drain on my vega was happening whilst i was running the stock Rom,I've recently put on Paul's modacco r8 Rom because i hated the big notification bar at the top and also to get access to the full market.Gotta say though that even now I've changed from the stock Rom to a custom Rom that the standby battery drain still seems to be there.
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We both like the CM 7 build with the tablet tweaks. This enables us to have the status bar at the bottom with the option for it to remain on top of any running app or not. I didn't think that having it on the bottom was a big thing but having tried it I much prefer it that way.
@wildcat777 As you have noted the battery draining issues on both the std and modified ROM, as well as others reporting it, it must be assumed to be a common issue. I will have to try and noted what my battery percentage is when I shut down my Vega, I keep forgetting to do that, and see if the improvement that I think we have noted in the CM 7 build is actually happening or, as I suspect, no different as I can't see how it would be if the Vega is shut down rather than just in standby.
FYI: I remembered that I unplugged my wife's Vega this morning at 9:00am when it had fully charged. Just checking it now (it was left switched off) by booting it up and it is at 100%.
That represents 5 hours of being off charge but powered down.
Mine has been powered off for at least 15 hours and it seems to have lost about 2-3% charge, but then a reboot will also use up some power.
I've known my Vega to be at 60% when I switch it off, when I switch it back on a little later on or even the next day the battery level has dropped right down to about 18%.
There's obviously a problem somewhere, I don't know if somebody is trying to pinpoint why this is happening.
Vimes the problem seems to start after the vega has been turned on and used for a bit,what i mean is,when i charge the vega whilst of then unplug it,i can leave it for 6 or 7 hours then turn it on and its still at 100% or 99% charged,but after that 1st initial switch on after the charge anytime i put it into any kind of prolonged standby and it will lose power hand over fist,even switching it of doesn't help.personally i don't think there's a fix for this,i think it's just something we'll all have to put up with.There is one possible solution that im considering.I also own a galaxy tab and the battery meter was giving out fake readings.so say the battery was at 60% it would suddenly drop to 3% even though i knew for certain it had plenty of charge left.anyway the fix for this problem was to open up the tab and remove the battery,wait for 30 minutes and replace the battery.this 100% fixed the problem,there's a thread on the galaxy tab forum on this i'll try and post it for you all.don't know if this might work with the vega or not could be worth a try.
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Cant post the thread but if you go to forums its in the Samsung galaxy tab general section and the thread is called "FAKE STATUS OF BATTERY"read the entire thread to understand the battery removal technique this has worked 100% and has helped solve a major problem that the tab had.
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Would wiping the battery stats in ClockworkMod make any difference? I've not tried this myself.
pl8715 said:
Would wiping the battery stats in ClockworkMod make any difference? I've not tried this myself.
Click to expand...
Click to collapse
wiping the battery stats on the galaxy tab didn't work so i guess it wouldn't work on the vega either.
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I wonder if Advent are aware of this bug. I am using the Modaco R8 rom. Does this bug accur with the stock rom? Doubt anybody
has had the stock rom on long enough to find out.
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This application worked a treat with my Android phone (ZTE Blade), although I have not tried it with the Advent as I see no need, as yet...
http://forum.xda-developers.com/showthread.php?t=1024867
pl8715 said:
I wonder if Advent are aware of this bug. I am using the Modaco R8 rom. Does this bug accur with the stock rom? Doubt anybody
has had the stock rom on long enough to find out.
Yeah the problem was still there whilst running stock Rom,i used my vega for about 3 weeks before putting r8 onto it and the standby drain happened constantly.
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Click to expand...
Click to collapse
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Maybe help if you remove phone.apk from core process
www.addictivetips.com/mobile/how-to-squeeze-more-battery-life-out-of-advent-vega/
I found simple way to remove:
I renamed with root explorer,force close is came up, and turned off and on Vega with by button.
I to have the problem of low battery after leaving the device off for a while, although it seems to be a battery gauge problem rather than a battery problem.
Because it still lasts ages before needing charging, hell sometimes it will suddenly flip from 10% to 80%.
Think battery can't read it's charge properly is all.
Related
Last night i changed my gt. Today it's changed, 100% percent. And icm goin' to check mail, use internet etc, after 5 mins. "Battery low", 1%. I change it again, after a few min it's back too 100% percent again, and the battery decrease each 10s. I restarted and it said 77%. I didn't get it. Did anyone get the same problem as me and anyone can help me???
Thank you very much!!
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Your not alone, i always experience this, i just learned to live with it well until an maybe an update will fix this i think there is a problem with the android system, you can still try to calibrate your battery though it didnt work for me
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Some expert told me that maybe it's 'cause the changer. Any ideas 'bout it?
Thanks!
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hand2leg said:
Some expert told me that maybe it's 'cause the changer. Any ideas 'bout it?
Thanks!
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Click to expand...
Click to collapse
It is definately the android system. There is another thread here where the samsung rep says they know about this version of android and the battery issue. My tab went to zero yesterday in ten seconds. It took me a long time to get the battery meter to show it was charging again.
texasreb said:
It is definately the android system. There is another thread here where the samsung rep says they know about this version of android and the battery issue. My tab went to zero yesterday in ten seconds. It took me a long time to get the battery meter to show it was charging again.
Click to expand...
Click to collapse
yep, i second you bro, if a lot of people are experiencing this then it may be due to some bug or something on the system i think its its definitely not the hardware if it is shame on samsung for manufacturing faulty devices, well lets hope for the update
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If i root my gt and install the battery fixing applications on the market. Does it help?
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Well i had the same gave it to the samsung service centre...and they replaced my battery...and now i have no.such problem...So i think its with the battery only...Dont know the cause though...
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Has anyone tried calibrating the battery? I just received a Tab for testing and it was used prior. Some battery monitor apps reported less then 12hours available after a full charge. After I calibrated it, i'm getting ~28 hours / moderate use before battery is depleted. What amazes me with the Tab is that when idle (overnight) there is no decrease in battery levels and graphing shows a complete flat line when idle.
I love this device
bdfx69 said:
Has anyone tried calibrating the battery? I just received a Tab for testing and it was used prior. Some battery monitor apps reported less then 12hours available after a full charge. After I calibrated it, i'm getting ~28 hours / moderate use before battery is depleted. What amazes me with the Tab is that when idle (overnight) there is no decrease in battery levels and graphing shows a complete flat line when idle.
I love this device
Click to expand...
Click to collapse
I have done all of the battery recalibrations suggested here on xda to no avail. The only thing that has helped me is plugging in a portable kennsington battery by usb that tricks the battery indicator and it seems to slow down my battery drain.
Said at all, i have to get use to with it, right???
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Try doing a resetting on the tab, and do a full charge, I mean let it charge for 8 hrs continuously.
If it can't work, bring it to Samsung for firmware upgrade (takes about an hour), after which do the same, long charging.
Last option, ask for an exchange with Samsung.
Rooting it has never been my option
henrylam said:
Try doing a resetting on the tab, and do a full charge, I mean let it charge for 8 hrs continuously.
If it can't work, bring it to Samsung for firmware upgrade (takes about an hour), after which do the same, long charging.
Last option, ask for an exchange with Samsung.
Rooting it has never been my option
Click to expand...
Click to collapse
Ok. I'll test and report asap. Thanks
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Ok. After resetting my gt. It' have the same problem with battery. Maybe i'll have to go to Samsung..
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Ok, hope it will work after new fimware upgrades. Mine sure does.
If you can let go your tab to them for a couple of days, you can ask them to check on the status of the battery as well.
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henrylam said:
Ok, hope it will work after new fimware upgrades. Mine sure does.
If you can let go your tab to them for a couple of days, you can ask them to check on the status of the battery as well.
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Click to expand...
Click to collapse
Can i let my tab go? I dont think so. But i'll try..
Thanks
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Hey guys, I was in the same boat (you can see my posts on other threads) and I have tried pretty much everything from flashing rom, resetting, calibrating, and bump charging. Last night I decided to open up the tab and look at the battery, thinking maybe I should buy a new battery to test.
Long story short, I disconnected the battery from the board and let it sit for 15mins before reconnecting. I check every couple hours to see the battery level in android. So far, I only lost 1% for 20hrs in flight mode w/o any app running. I usually lost 20% overnight and would regain that after reboot. So the problem is GONE and the system is reporting the right battery percentage without fake dropping.
I will continue to monitor it and report back, but it looks great so far. Hope this helps other XDA fellows.
Thats actually ive been wanting to do just prick it open, funny though i my problem resolved it self, last night i keep rebooting my tab up to the point it hangs and froze then i left it like that for an hour then i pressed the power button for around 10 seconds to reboot it again, once it booted up it showed the correct percentage, now im still monitoring if the trick went well..
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shinji21 said:
Hey guys, I was in the same boat (you can see my posts on other threads) and I have tried pretty much everything from flashing rom, resetting, calibrating, and bump charging. Last night I decided to open up the tab and look at the battery, thinking maybe I should buy a new battery to test.
Long story short, I disconnected the battery from the board and let it sit for 15mins before reconnecting. I check every couple hours to see the battery level in android. So far, I only lost 1% for 20hrs in flight mode w/o any app running. I usually lost 20% overnight and would regain that after reboot. So the problem is GONE and the system is reporting the right battery percentage without fake dropping.
I will continue to monitor it and report back, but it looks great so far. Hope this helps other XDA fellows.
Click to expand...
Click to collapse
Hi Shinji, it is quite unbelievable that the tab only drain 1% for "20hrs". But it is great, if opening the tab can solve battery issue. Now, I myself encounter some other new problems, after I solved the sudden drop in battery issue by upgrading to new firmware (e.g. 50% => ask me to shut down). Now, no matter how I charge, it will remain 67 or 70%............
Do you have the instruction to open up the tab, or any link which you can lead me too? Thanks.
Hey henrylam do you charge phone whilst on and how long do you charge for before you get fed up waiting for it to move from 70% and remove charger ?
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wildcat777 said:
Hey henrylam do you charge phone whilst on and how long do you charge for before you get fed up waiting for it to move from 70% and remove charger ?
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Click to expand...
Click to collapse
I try both, on and off, sometimes it work sometimes it doesn't. After I have done factory reset, it seems ok for first 3 cycles. After that, the problem surfaced again.
Sometimes, it just stop charging at 65 (curvefish battery indicates) but battery icon shows like 85%. I felt like smashing the Tab and get myself a new Ipad. I am thinking to send it again to Samsung this Friday, and let them investigate for a while (hopefully 2 weeks will be sufficient). Damn it, my wife tab has no such issues. She didn't even do an upgrade on her firmware.
On Galaxy S I9000.....what can I do to fix it? This happens even with minimal usage.
Which rom?
malcho said:
Which rom?
Click to expand...
Click to collapse
2.3.4 Gingerbread xxjvp
try to overcharge your phone and see if there still any battery drainage!
I have same "problem". It will be fixed when there's been few batterycycles.
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I've only had this rom for 1 day.
Sry for doublepost.
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I have this issue on Darky 10.1 (2.6 kernel), 2.3.3
Battery lasts around 10 hours with light to medium usage (its a new original Samsung battery as well).
Does anyone have any quick advice to fix this? Bit under time pressure due to job at the moment and don't have much time to research this. Any advice to fix this easily and quickly?
I had this problem after switching on the “Vorabruf über Mobilnetz“ in the Cache-Settings of Google Maps. Maps was closed, but battery was fast going down. Using XWJVH.
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I too have almost the same problem with Darky Rom 10.1 - but I've heard that it has been fixed in the new beta version. I'm gonna flash it at the end of the week and after a few days of observing, I'm gonna tell you the results.
Jobiza said:
I have same "problem". It will be fixed when there's been few batterycycles.
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Click to expand...
Click to collapse
It's been through quite a few cycles.
I think I figured it out.....I think it was Skype. If you sign in the app is always on...it doesn't have an exit feature. There is, however, an app to close it. I used it and got normal battery life today!
We'll see if it keeps working like it should.
So I've upgraded to 2.3.4, (Ficeto.Deodexed.XXJVP) and Android OS battery drain stopped. Now it shows 70% battery usage on display (before it was 70% android OS). I recommend updating your system too
with darky on medium use never had more than 14 hrs )
I've given up for the moment and gone back to Darkys 9.5
Now at least I can get through one whole day and have about 40% left
Diaf82 said:
2.3.4 Gingerbread xxjvp
Click to expand...
Click to collapse
Are you willing to flash the rom again? or you can try to use the speedmod 15g t11 for the kernel to replace the JVP kernel.
it's said that when you use the USB connection to your PC, you need to reboot it. So this battery drainage will not happen.
In the ROm 2.3.3 JV5 and JV6 for Asia, I do the same to keep the batter alive.
Try backing up everything and then factory reset phone. Generally this happens because of a few unwanted applications excessively using ur processor, in turn draining battery or there may be a malware that stealthily connects itself to the net. This will almost certainly cure the disease. If it doesn't, then there is a serious defect in ur hardware or some of ur system app required for properfunctioning of the phone is corrupted, causing excess pressure on the processor
It is a big problem to everyone, I charge twice per day for this.
Calibrate your battery
Let the battery go down to 0% and turn off
Then turn the phone on, it'll turn itself off again cause battery is low
Keep doing this until its totally 0%
Plug in the charger, charge it to 100%
Turn the phone on
Download SGS Tools from the android market place
Run the app
Go to "scripts"
click delete battery stats
Unplug charger & you're done
battery should be more stable now
go to settings
applications
running services
check what you have in the background
close them down if they're unecessary
I get through the workday with only 10% loss
If you have an really old SIM card, try and replace it with a brand new one. This may also help. I had bad battery run time with two LG Optimus 2x phones (about 10 hours) and not so stellar 20 hours with the i9000. Finally I stumbled over some advise to replace old SIM cards. Since mine was over 12 years old, I ordered a new one. It is not gonna change the world, I know, but it was worth a try .
The topic pretty much explains it. I've been using different modified stock roms and now I'm on the latest nightly of CM7, and I keep having this issue. After a reboot at around 50%, the battery drops to 15%. The weird part is that while I continue to use the phone, it slowly rises back up to sometimes 30% and then starts going back down. I've always cleared battery stats when flashing and calibrated (which I believe is unnecessary), but I don't know if this is a problem with the battery, the phone, or if anyone else is having the same issue?
Attached is a screenshot of battery usage. You can see I never actually charged the phone.
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I have exactly the same issue.
Sent from HydrOG3N MOD S2.
Technology Evolves, Android Evolves.
HydrOG3N is THE Revolution.
[email protected] looks like a bow and arrow..
anyway guys, you need to recalibrate your battery, its not being read accuracy.
download BatteryCalibration from the market, charge your phone till 100% (not just 100% but when it beeps, that its truely at 100%), then use BatteryCalibration to calibrate your battery, and then drain it to 0.. (crank full brightness, turn on LED flashlight, blast internet radio, whatever makes it drain faster to get this part overwith), then recharge it to max.
so;
charge to full 100%
while still plugged in, run BatteryCalibration
discharge to 0%
recharge to 100%
battery successfully calibrated, you will now have an accurate reading
I had exactly the same issue on 3 different custom roms....finally resolved by going bck to stock rom
mgxplyr said:
The topic pretty much explains it. I've been using different modified stock roms and now I'm on the latest nightly of CM7, and I keep having this issue. After a reboot at around 50%, the battery drops to 15%. The weird part is that while I continue to use the phone, it slowly rises back up to sometimes 30% and then starts going back down. I've always cleared battery stats when flashing and calibrated (which I believe is unnecessary), but I don't know if this is a problem with the battery, the phone, or if anyone else is having the same issue?
Attached is a screenshot of battery usage. You can see I never actually charged the phone.
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Click to expand...
Click to collapse
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soraxd said:
[email protected] looks like a bow and arrow..
anyway guys, you need to recalibrate your battery, its not being read accuracy.
download BatteryCalibration from the market, charge your phone till 100% (not just 100% but when it beeps, that its truely at 100%), then use BatteryCalibration to calibrate your battery, and then drain it to 0.. (crank full brightness, turn on LED flashlight, blast internet radio, whatever makes it drain faster to get this part overwith), then recharge it to max.
so;
charge to full 100%
while still plugged in, run BatteryCalibration
discharge to 0%
recharge to 100%
battery successfully calibrated, you will now have an accurate reading
Click to expand...
Click to collapse
I'll try this one more time and report back.
mgxplyr said:
I'll try this one more time and report back.
Click to expand...
Click to collapse
Sorry guys, but your method with BatteryCalibration is useless ....
If you wanna do a correct calibration, look at here http://forum.xda-developers.com/showthread.php?t=1312273
Cheers
Put back the battery on the right side.
8. Turn on the phone.
9. Pray the Battery god
And that post is just nonsense based on the old battery bump method .
jje
mgxplyr said:
The topic pretty much explains it. I've been using different modified stock roms and now I'm on the latest nightly of CM7, and I keep having this issue. After a reboot at around 50%, the battery drops to 15%. The weird part is that while I continue to use the phone, it slowly rises back up to sometimes 30% and then starts going back down. I've always cleared battery stats when flashing and calibrated (which I believe is unnecessary), but I don't know if this is a problem with the battery, the phone, or if anyone else is having the same issue?
Attached is a screenshot of battery usage. You can see I never actually charged the phone.
Sent from my GT-I9100 using Tapatalk
Click to expand...
Click to collapse
i have the same problem when i use custom roms.
i have been using pure stock rom by wannam but rooted for the past week with 12 hours aday syncing and surfing the net and plenty of voice calls via viber and my battery lasts at least 16 to 18 hours.
right now i am using odexed KL3 Kernel KL2Base KL1modem 2.3.6 and it is absolutely amazing interms of battery life and performance.
http://forum.xda-developers.com/showthread.php?t=1292825
http://www.multiupload.com/06I066U6S8
i have gotten rid of all samsung craps through titanium backup. i only have samsung apps application cuz of some paid apps which are for free such as tapatalk and many more on samsung app store.
my free memory is 97mb (original rom free memory is only 27mb)
i dont use any task killers i use 1Tapcleaner pro.
JJEgan said:
Put back the battery on the right side.
8. Turn on the phone.
9. Pray the Battery god
And that post is just nonsense based on the old battery bump method .
jje
Click to expand...
Click to collapse
Maybe, you wanna share a better way to all of us ?
Are you using speeded kernel. If you are then it is because logging and debugging is off.
Sent from my GT-I9100
Completely stock phone never rooted.
Same problem.
Just sayin'
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Got the same here, very strange, on CM7
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This thing only happens on CM7 for me. It had 40% before reboot and like 15% after. However mine only increased to about 17% then started dropping as usual. This never happened on any stock ROMs I've tried(stock, not themed/modded stock).
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did you
did you rsolve the problem ? how? I have the same problem and I tried more stock roms ... I don't know what tot do ....
Its nothing to do with calibration etc, its just how the fuel gauge chip works, it learns and more accurately reports usage over time. For example, if you reboot and (I can't remember the actual voltages for the S2) you have 1200mV, the chip goes, "ah, that is 15% battery." Then as you use it more, it relearns its settings and goes "aaah, my mistake 1200mV is really 30% battery. I'll display that instead."
Its been covered frequently that "calibrating" the battery of the S2 in any way but actually using it, is next to useless.
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---------- Post added at 11:05 AM ---------- Previous post was at 11:03 AM ----------
Also just noticed this thread is a year old, but hopefully it will help the poster above.
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I'm having this problem too, what did you all do besides get new phones?
Got the same here, after update stock jellybean
Had this problem, when my S2 was half a year old.
I got the original Extended Battery and that solved this issue completely.
The replacement Battery has held up since 2013
soraxd said:
[email protected] looks like a bow and arrow..
anyway guys, you need to recalibrate your battery, its not being read accuracy.
download BatteryCalibration from the market, charge your phone till 100% (not just 100% but when it beeps, that its truely at 100%), then use BatteryCalibration to calibrate your battery, and then drain it to 0.. (crank full brightness, turn on LED flashlight, blast internet radio, whatever makes it drain faster to get this part overwith), then recharge it to max.
so;
charge to full 100%
while still plugged in, run BatteryCalibration
discharge to 0%
recharge to 100%
battery successfully calibrated, you will now have an accurate reading
Click to expand...
Click to collapse
did it but it still there... phone flicks and goes off at or below 40% wont turn on again:crying:
same here and I got the 2000 mAh samsung battery back in the days but now it happens with both of them also when my phone shuts off the screen brightness start flashing weirdly
Ok, so I've had my SGN for little under a month for the first few weeks I had it I was getting great battery life, almost 6 hours screen time full day of battery etc.. Then I rooted it using one click root because I wanted some more access, since then battery life has seemingly been slowly getting worse. I have tried changing back to stock roms and custom roms, I've fully discharged the battery and charged while it is off a number of times but I'm down to 3 hours screen time and can't get a full day out off it anymore.
Is this something to do with the way I rooted, what can I do test and try and get back my battery life, this is the main reason I got this phone..
It's hard to say if it was the first update I installed/rooting or something wrong with the way I'm charging but it's certainly decreased even on a stock ROM without installing anything..
Anybody else encountered this?
Check battery stats and show us a print screen
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Going to try latest firmware and just bought Odin mobile.. Hoping that'll fix it.
Won't let me add a picture says I don't have permission.. Sigh.
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Goonish said:
Ok, so I've had my SGN for little under a month for the first few weeks I had it I was getting great battery life, almost 6 hours screen time full day of battery etc.. Then I rooted it using one click root because I wanted some more access, since then battery life has seemingly been slowly getting worse. I have tried changing back to stock roms and custom roms, I've fully discharged the battery and charged while it is off a number of times but I'm down to 3 hours screen time and can't get a full day out off it anymore.
Is this something to do with the way I rooted, what can I do test and try and get back my battery life, this is the main reason I got this phone..
It's hard to say if it was the first update I installed/rooting or something wrong with the way I'm charging but it's certainly decreased even on a stock ROM without installing anything..
Anybody else encountered this?
Click to expand...
Click to collapse
I have the same "feeling" with my Note. I have installed System Panel to monitor usage but I can't find anything specific that seems to be sucking the power. But it certainly "feels" like my battery is draining faster than before.
It's probably as the phone gets older, you install more & more Apps. Some of these are probably working in the background sucking your battery.
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Even with a clean stock rom, it doesn't seem as good as it was without root or any updates.. Wish I remembered what the phone came loaded with, I'd give that a go..
xamaba said:
I have the same "feeling" with my Note. I have installed System Panel to monitor usage but I can't find anything specific that seems to be sucking the power. But it certainly "feels" like my battery is draining faster than before.
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Try Rocket Rom v17 or latest XXLA1 firmware and your battery life will come back even better than before, just me
Same "feeling" here! I will try LA1 firmware....
So I'm currently sitting on 4.30 hours screen time, 15 hours uptime with 20% battery remaining.
Running la1 firmware and la3 modem, been using stock browser. Taking lots of photos with flash too, so I think this combo has rectified my issues but I know there's more potential as this is roughly the same stats I got on my dhd, although that was underclocked and tweaked to the clappers.
Faith is resetored in my device, hopefully it improves.
Hey I've searched for help on the subject all over and. I'm not seeing anyone with this problem, on the contrary everyone seems to be doing better.
Anyway I got the OTA update to 4.2.2 from the. General forum a few days ago and flashed it without much consequence and everything seemed fine. I reaquired my root but I have noticed my battery is losing charge way too fast doing light browsing and use.
Checking battery use I got 2 hours of screen time with 30% of the battery and again this has been simply browsing sites with pure text. As I'm writing this it went from 70% to 68%
To list a few key things that have happened that might be important and I'm hoping anybody can help or give advice.
1) I stupidly forgot to wipe cache and dalvik before and after flashing the update, when I remembered I went to recovery and did this
2) I rerooted
3) On Friday I fell asleep using it and when I woke up it was completely drained, honestly I don't even remembered what I was doing cause I had a bit too much wine but I think I was playing an emulator and when I woke up it wouldn't even turn on so I charged it back to 100%
As I write this now I think back and problem seems to have started then.
I tried re flashing a backup, which didn't help and I flashed franco kernel reading it gave good battery.
My last idea is simply reverting back to stock and see if it helps but before that I wanted to check some opinions or advice here.
PS I have already used BBS and its finding nothing wrong in wakelocks or use (except something called AudioOut2)
As I finish this im down to 66%, definitely not normal.
Any help is appreciated.
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Having the same problem.
Didn't even make it to work and was below 50%. Weird.
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Did you at some point let it drain completely to 0% after updating to 4.2.2?
If nobody has any idea ill just go back to stock and report results.
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Well if anybody has a similar issue or cares, going back to stock seems to have fixed the issue. Regardless I did some light testing on the battery. It shows marginal better perfomance on 4.2.2
By switching Kernel there was no change it seems but then again the test only covered two activities perhaps with further comparissons better results would be gotten.
But long story short if anybody has this problem apparently going back to stock is the way to go.
I'll keep a careful eye on the battery and gauge on regular use and if it happens again have a better idea of what caused it.
Its a program that's running or not completely shutting down.
Torrent was my issue. Uninstalled rebooted and then reinstalled.
My battery life is good now.all day and still over 80%.
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twyztyd said:
Its a program that's running or not completely shutting down.
Torrent was my issue. Uninstalled rebooted and then reinstalled.
My battery life is good now.all day and still over 80%.
Sent from my Nexus 7 using xda app-developers app
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Well I have encountered a completely new problem lately.
In the last week this has happened 3-4 times. I leave it charging or simply on deep sleep for a while and when I try to turn it on it won't, I'm not sure if its shutting down since when I plugged it in (thinking battery had drained) not battery charging animation came up, instead I left the power button pressed and it came up with whatever charge it had.
Not sure if its a side effect of the original problem of the battery discharge or something to do with torrent clients as 3 of the total times it has happened I was downloading something and left it running.
Not sure what to do at this point since I find no info on this or it happening to anybody else. What I find are things like it not charging etc which really arent my issues.
I will avoid using torrents on it for a few days and see if it happens again, if it does I will seriously have to consider contacting Google or Asus since this device doesn't even have 90 days in my possession yet.
If anyone is following this (really just posting here to help anybody who finds the same problem and as a sort of journal) I found this post on the kernel im running thread
http://forum.xda-developers.com/showpost.php?p=38422891&postcount=4603
Somebody replied to that post stating its a 4.2.x problem
It could also be a kernel problem with torrents as further down the posts another person complains about the same happening when using a bittorrent client
I'll post with whatever I find out.
I've been having the same problem glad to see it isn't just me.
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Hi Chaps, Since my upgrade to 4.2.2 I thought the battery life was great. It stayed at 100% for ages and when I was streaming music for a few of hours and the battery only went to 96%. Superb I thought..
But, yes there is a but. My N7 now shuts down when the battery is at 32% and I need to charge it to get it to reboot as it is well drained. Is it possible to zero the battery indicator or recalibrate it for an accurate reading? TATA R.
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robertsmith1873 said:
Hi Chaps, Since my upgrade to 4.2.2 I thought the battery life was great. It stayed at 100% for ages and when I was streaming music for a few of hours and the battery only went to 96%. Superb I thought..
But, yes there is a but. My N7 now shuts down when the battery is at 32% and I need to charge it to get it to reboot as it is well drained. Is it possible to zero the battery indicator or recalibrate it for an accurate reading? TATA R.
Sent from my Nexus 7 using xda app-developers app
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Battery calibration, which should be done rarely, is merely a matter of putting your device through one complete charge/discharge cycle. Don't waste your time with battery calibration apps, as they are 100% snake oil. Likewise, you can disregard any misinformation about wiping battery stats, as that has absolutely no bearing on battery charge indication.
Try unplugging your battery for a few minutes, and then plug it back in, ensuring that the connector is firmly seated.
Getting pissed off here. N7 shuts down at 42% now. WTF. Is this a 4.2.2 problem? If so how do I revert back to an earlier version?
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Mine is ****ing **** since 4.2.2 and its official, writing this it went from 40 to 37 the ****
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I am seeing reduced battery life on 4.2.2...
I used to be able to go all day on a charge. Now I can't make it through the evening ...
I know that is subjective as I didn't indicate my prior usage compared to my current usage pattern.
But my perception is that battery life has degraded ...
As an aside, I noticed that an el-cheapo IKEA power strip didn't provide enough juice to keep the battery from draining further while using it when plugged in...
It plugged in at 20% and kept using the N7... awhile later I was in the mid-teens.
I don't use that power strip any longer....
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