Hello!
Sorry I can't post this in the Paranoid Android thread yet. As a noob I can't post in that forum until I have 10 posts so I'm at a loss as to where I should post this.
Anyway, I just put the new 2.1799 PA ROM on my Nexus 7. Unfortunately, I seem to have a serious battery drain when the screen is on. I have read many posts where people claim to have easily achieved 6+ hours of active screen time per battery charge whereas I'm only getting 3-4 hours of active screen time per charge, almost all of it related to web surfing. I have a strong wifi signal and I keep my screen brightness around 20/30 range. I'm not sure if it's the ROM or if my battery is defective.
I have also read about a battery calibration app through a different thread. Is that necessary for the PA ROM? I didn't see anything in the tutorial mentioning a battery calibration.
Included are two pictures, although they aren't very indicative of my problem as my tablet was sitting in my backpack for most the day.
Please tell me I'm just being paranoid! Thank you for the help!
thatnoob said:
Hello!
Sorry I can't post this in the Paranoid Android thread yet. As a noob I can't post in that forum until I have 10 posts so I'm at a loss as to where I should post this.
Anyway, I just put the new 2.1799 PA ROM on my Nexus 7. Unfortunately, I seem to have a serious battery drain when the screen is on. I have read many posts where people claim to have easily achieved 6+ hours of active screen time per battery charge whereas I'm only getting 3-4 hours of active screen time per charge, almost all of it related to web surfing. I have a strong wifi signal and I keep my screen brightness around 20/30 range. I'm not sure if it's the ROM or if my battery is defective.
I have also read about a battery calibration app through a different thread. Is that necessary for the PA ROM? I didn't see anything in the tutorial mentioning a battery calibration.
Included are two pictures, although they aren't very indicative of my problem as my tablet was sitting in my backpack for most the day.
Please tell me I'm just being paranoid! Thank you for the help!
Click to expand...
Click to collapse
The battery recalibration is a myth, but there is also no harm in trying it.
according to the pics you have attached, there doesn't seem to be anything wrong.
Battery also drains faster if you have too many apps that have services running.
Ex: Facebook.
I know there is a battery warranty, but how bad does it have to be to get it replaced? My battery cannot reach the 9.5hrs of 720p video playback (with headphones in) as achieved by Asus. I can only get 8hrs. From normal usage, I am only able to get 6 hours.
The ROM has less to do with the battery than the kernel does.
I would say try flashing another kernel. The default cyanogenmod kernel that comes with Paranoid Android didn't give me very good battery life.
Franco kernel gives me excellent battery life. Other good ones for battery are Faux or Motley.
You might like reading this thread about kernels and battery life.
http://forum.xda-developers.com/showthread.php?t=1889571
Sent from my Paranoid Nexus 7
AlleN7 said:
I know there is a battery warranty, but how bad does it have to be to get it replaced? My battery cannot reach the 9.5hrs of 720p video playback (with headphones in) as achieved by Asus. I can only get 8hrs. From normal usage, I am only able to get 6 hours.
Click to expand...
Click to collapse
That is in the normal range i would say, Companies usually exaggerate.
As suggested try franco's kernel.
He has a free kernel flashing app on the play store.
My issue is with how the battery percentage is running down......
Charge the N7 to max and use it for a good 2 hours and the battery STILL reads 100%.
Even if I then shut down and reboot it still shows 100%, then all of a sudden it will start to drop very slowly at first until it gets to around 40% which it then shuts down and will not reboot, obviously void of any battery cells.
Clearly it's a calibration issue.
This is on a stock non-rooted machine.
vinny86 said:
That is in the normal range i would say, Companies usually exaggerate.
As suggested try franco's kernel.
He has a free kernel flashing app on the play store.
Click to expand...
Click to collapse
I tried his kernal. I did my video play back test and I got the same 8 hours as before. During normal usage I think I will get about 30-40 more minutes. Still not what others are getting
Beards said:
My issue is with how the battery percentage is running down......
Charge the N7 to max and use it for a good 2 hours and the battery STILL reads 100%.
Even if I then shut down and reboot it still shows 100%, then all of a sudden it will start to drop very slowly at first until it gets to around 40% which it then shuts down and will not reboot, obviously void of any battery cells.
Clearly it's a calibration issue.
This is on a stock non-rooted machine.
Click to expand...
Click to collapse
Try a factory reset. If that doesn't work, you're more than likely actually looking at it being a hardware issue.
Sent from my Nexus 7 using Tapatalk 2
najaboy said:
Try a factory reset. If that doesn't work, you're more than likely actually looking at it being a hardware issue.
Sent from my Nexus 7 using Tapatalk 2
Click to expand...
Click to collapse
Factory reset was the very first thing I tried when it started playing up.... I'm hoping when 4.1.2 rolls out it may clear it. If not then I'll have to look at doing a root and access the battery file to see if deleting may help.
Thing is a recharge should clear out the battery file stats and calibrate, which clearly it's not.
Apart from this the N7 is flawless so it's staying with me. Running hours is the same, just doesn't give an accurate reading of how the battery is running down.
It's not a big issue.... to be honest I'm more curious than annoyed.
Beards said:
Factory reset was the very first thing I tried when it started playing up.... I'm hoping when 4.1.2 rolls out it may clear it. If not then I'll have to look at doing a root and access the battery file to see if deleting may help.
Thing is a recharge should clear out the battery file stats and calibrate, which clearly it's not.
Apart from this the N7 is flawless so it's staying with me. Running hours is the same, just doesn't give an accurate reading of how the battery is running down.
It's not a big issue.... to be honest I'm more curious than annoyed.
Click to expand...
Click to collapse
Have you tried installing a 3rd party battery app to see if it registers the correct battery output? This is the one I have used, works good. GL
https://play.google.com/store/apps/details?id=net.hubalek.android.reborn.beta&hl=en
snipe2nite said:
Have you tried installing a 3rd party battery app to see if it registers the correct battery output? This is the one I have used, works good. GL
https://play.google.com/store/apps/details?id=net.hubalek.android.reborn.beta&hl=en
Click to expand...
Click to collapse
Yes thanks.... Tried quite a few. Nothing changes.
Beards said:
Factory reset was the very first thing I tried when it started playing up.... I'm hoping when 4.1.2 rolls out it may clear it. If not then I'll have to look at doing a root and access the battery file to see if deleting may help.
Thing is a recharge should clear out the battery file stats and calibrate, which clearly it's not.
Apart from this the N7 is flawless so it's staying with me. Running hours is the same, just doesn't give an accurate reading of how the battery is running down.
It's not a big issue.... to be honest I'm more curious than annoyed.
Click to expand...
Click to collapse
You do realize that wiping batterystats.bin has absolutely nothing to do with the battery fuel gauge, right? It does not "calibrate" the battery or affect reported charge. The myth of wiping battery stats has long since been debunked by Google's Android engineers. The only info contained in the file is a list of apps that used battery since the last full charge.
The only other thing you could do besides a factory reset is see if 4.1.2 fixes it for you. If not, then it's definitely hardware causing the issue- the battery charge is likely being improperly read and reported by the battery itself.
Sent from my Nexus 7 using Tapatalk 2
Just wondering if anyone knows what these spikes might signify?
I had a Nexus for 2 weeks and the last few days it was turning itself off like the issue here every night:
http://forum.xda-developers.com/showthread.php?t=1830546
My post is there too. Previously, I only saw one spike with the old Nexus, now I see more.
I exchanged my Nexus 7 for a new one yesterday but does the battery still have issues? It doesn't turn off at night so far but my Battery Info graph shows even more spikes now.
Any engineer know if this is normal or safe?
Thanks!
Still happens
I exchanged the Nexus for a new one.
My NEW 32 tab worked out fine for a night and woke up today to the full battery indicator and tablet off again.
I have a new insight though, somehow the battery temp is rocketing to 100 and I'm guessing that is when it shuts off.
It may be because I am using SetCPU to limit my CPU speed to 300mhz when the screen is off. Maybe the tablet is trying to update all my apps while I am sleeping? It shouldn't use so much power though.
I'm going to try to create a new command to let it use it's whole CPU as long as it's on AC and screen off and see what happens tonight.
Some ppl reported that after official 4.2 update their battery drains while screen off. Issue was resolved with factory reset. I have same issue. Didn't had the time to do factory reset yet.
Sent from my Nexus 7 using XDA Premium HD app
For me, I'm not running 4.2 or have i upgraded on this Nexus. On the first one i had, I did update, and it seemed to slow down the tablet.
This one was stock and then I rooted, put CM10 on it and then Franco Kernel.
This problem worries me because it makes me think something is traumatizing my tab enough to shut it down at night and I can't figure out what it is.
I don't know if I want to keep it if it is going to keep doing this. But I do love this tablet.
I wonder if this could be a cyanogen mod problem? I've read about some people having a power problem with cyanogen,nobody has said anything about their tablet getting bricked yet though. That's what I'm afraid of.
Hi, I've bought a nexus 4 about a month ago. I works great and the battery life is good enought but i notice that sometimes I connect the charger (when the battery is 40% full for example) and a few minutes later it says it is 100%.
Ofcourse it's not and some minutes later it drops. If I reboot the phone it shows the correct percentaje, but I happens very often.
Somebody has the same issue?
I didn't try to wipe the battery stats because I didnt install a custom recovery. Is there any way to fix it without flashing it?
thanks
serialger said:
Hi, I've bought a nexus 4 about a month ago. I works great and the battery life is good enought but i notice that sometimes I connect the charger (when the battery is 40% full for example) and a few minutes later it says it is 100%.
Ofcourse it's not and some minutes later it drops. If I reboot the phone it shows the correct percentaje, but I happens very often.
Somebody has the same issue?
I didn't try to wipe the battery stats because I didnt install a custom recovery. Is there any way to fix it without flashing it?
thanks
Click to expand...
Click to collapse
Most N4's have some quirky battery stat behaviour. You'll have to learn to live with it, wiping battery stats, or reflashing the stock images, or an alternative ROM, won't do anything to address this.
CMNein said:
Most N4's have some quirky battery stat behaviour. You'll have to learn to live with it, wiping battery stats, or reflashing the stock images, or an alternative ROM, won't do anything to address this.
Click to expand...
Click to collapse
Really? SO ****ING AWESOME! haha
thanks!
serialger said:
Really? SO ****ING AWESOME! haha
thanks!
Click to expand...
Click to collapse
It's the first thing I noticed about the phone. I've only charged from 0 to 100 in a second once though when I first got the phone, aside from that just the occasional lazy updating of the actual percentage. Stressing the phone a bit tends to help it "catch up" to where it should be.
Edit: you know, it's good OCD therapy, it may help you get past your OCD if you have it.
If you don't have OCD, you certainly will now...
CMNein said:
It's the first thing I noticed about the phone. I've only charged from 0 to 100 in a second once though when I first got the phone, aside from that just the occasional lazy updating of the actual percentage. Stressing the phone a bit tends to help it "catch up" to where it should be.
Click to expand...
Click to collapse
Yes, the same happened to me, the issue is that sometimes I lost track of when it plug it to the charger and after use it the battery drains. It is very annoying.
I will try to charge from 0 to 100 a few times to si if the stats sync with the real battery state...
Thank
I'm getting pretty consistent reading far as 0% - 100% goes (course I drained the battery down to zero twice and charged back up).
What I'm finding that seems rather weird is glitchy mV reading with battery monitor widget pro. It does decrease as the battery decreases as expected, what's unexpected is all the lil spikes upward in it's value over time, like every few mins it'll jump up like from 3995mv to 4040mv or similar jumps as if the widget can't get an accurate reading of the battery's mV level. So it look weird because the only time you would see the mV rising, is if you're charging it.
And I know someone else on this forums with a Nexus 4 that's actually showing positive mA values when he's not even plugged into a charger.
But as far as % reading goes, seems pretty accurate now, just the readings I'm getting from battery monitor widget had me concerned that the battery was bad on my less than a week old Nexus 4. My Nexus 7's history/stats look rock-stable by comparison, kind of wondering if it's an LG thing.
kbeezie said:
I'm getting pretty consistent reading far as 0% - 100% goes (course I drained the battery down to zero twice and charged back up).
What I'm finding that seems rather weird is glitchy mV reading with battery monitor widget pro. It does decrease as the battery decreases as expected, what's unexpected is all the lil spikes upward in it's value over time, like every few mins it'll jump up like from 3995mv to 4040mv or similar jumps as if the widget can't get an accurate reading of the battery's mV level. So it look weird because the only time you would see the mV rising, is if you're charging it.
And I know someone else on this forums with a Nexus 4 that's actually showing positive mA values when he's not even plugged into a charger.
But as far as % reading goes, seems pretty accurate now, just the readings I'm getting from battery monitor widget had me concerned that the battery was bad on my less than a week old Nexus 4. My Nexus 7's history/stats look rock-stable by comparison, kind of wondering if it's an LG thing.
Click to expand...
Click to collapse
Well this is odd... i think it might be an issue with the -kind of- voltimeter (battery sensor? i dont know how to name it). The battery life is ok up to now but the stats are driving me crazy!
serialger said:
Well this is odd... i think it might be an issue with the -kind of- voltimeter (battery sensor? i dont know how to name it). The battery life is ok up to now but the stats are driving me crazy!
Click to expand...
Click to collapse
Those of us who look beyond just the % available are easily driven crazy.
But then again because I do, I was able to prove a certain brand of charger was incompatible with my Nexus tablet.
Sent from my Nexus 7 using XDA Premium HD app
I tried to catch it in the act via adb and shell last fall pinging the voltage, fuel gauge, etc... but that was all my n00b self was good for.
Sent from my Nexus 4 using Tapatalk 4 Beta
I've noticed that my battery % is off also. Not as bad as jumping up to 100% or anything, but I notice that when charging, the % is 20% higher than the actual battery. It'll say fully charged, but when I reboot the phone it'll say something like 83%. That happens a lot, and not always at '100%'. If I reboot anytime during the charging process, it drops around 20%. I haven't tried to do it right after I connect it, but every time I do actually reboot it happens. Kinda weird. Not even close to a deal-breaker or anything, just a quirk that I wouldn't mind getting fixed.
kbeezie said:
I'm getting pretty consistent reading far as 0% - 100% goes (course I drained the battery down to zero twice and charged back up).
What I'm finding that seems rather weird is glitchy mV reading with battery monitor widget pro. It does decrease as the battery decreases as expected, what's unexpected is all the lil spikes upward in it's value over time, like every few mins it'll jump up like from 3995mv to 4040mv or similar jumps as if the widget can't get an accurate reading of the battery's mV level. So it look weird because the only time you would see the mV rising, is if you're charging it.
And I know someone else on this forums with a Nexus 4 that's actually showing positive mA values when he's not even plugged into a charger.
But as far as % reading goes, seems pretty accurate now, just the readings I'm getting from battery monitor widget had me concerned that the battery was bad on my less than a week old Nexus 4. My Nexus 7's history/stats look rock-stable by comparison, kind of wondering if it's an LG thing.
Click to expand...
Click to collapse
My nexus is also showing +ve mA values while it's not charging, and the values are absolutely crazy, +268, +168, +1171
Is it a battery issue?
I have charged it completely (8 hours) many times and run it to the bottom , tried deleting battery stats etc but nothing has helped.
Shall I get the battery replaced?
tried to delete the battery stats file and wait for a while and see if any difference?
Sent from my Nexus 4 using XDA Premium 4 mobile app
floxrin said:
tried to delete the battery stats file and wait for a while and see if any difference?
Sent from my Nexus 4 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Tried that multiple times but no change, what are the possibilities? Damaged battery? Damaged battery sensors on the phone?
japmeet said:
Tried that multiple times but no change, what are the possibilities? Damaged battery? Damaged battery sensors on the phone?
Click to expand...
Click to collapse
How old is the phone?
http://pocketnow.com/android/deleting-androids-batterystatsbin-wont-grant-more-jiuce
Well Google support definitely knows this is a big problem. After I explained the exact same issues I was having with the battery indicator being wrong they offered a in warranty replacement right away with no trouble shooting what so ever. Problem was they wanted to authorize my debit card for the full price of a phone plus shipping until they received mine back. Unfortunately I didn't have 230 bucks that I could just have tied up in authorization limbo for 2 weeks. So they transferred me to LG support because they have a return policy where they let you ship the phone back first. LG at first tried to say they only do paid repairs on Nexus 4's and that google is responsible for warranty's, but a little arguing about manufacturer warranty laws in the US and threatening to file a complaint with the FCC they agreed to replace the phone under LG warranty. Again they didn't do any troubleshooting at all. Upon explaining the problem they went right into replacement phone. This leads me to believe there is no easy fix or software problem they can update, but rather a hardware problem.
Johmama said:
I've noticed that my battery % is off also. Not as bad as jumping up to 100% or anything, but I notice that when charging, the % is 20% higher than the actual battery. It'll say fully charged, but when I reboot the phone it'll say something like 83%. That happens a lot, and not always at '100%'. If I reboot anytime during the charging process, it drops around 20%. I haven't tried to do it right after I connect it, but every time I do actually reboot it happens. Kinda weird. Not even close to a deal-breaker or anything, just a quirk that I wouldn't mind getting fixed.
Click to expand...
Click to collapse
I have exactly this behavior all of a sudden the last 2 weeks.
I have worse issues....
We had the screen/digitizer replaced after my wife dropped the phone.
The phone now has some issues. It will charge, and operate ok until the battery reaches about 80%.
Then the touch will go crazy, and the phone will turn off.
Upon rebooting, the battery is suddenly at 0%.
I purchased a new battery and installed it. It charged to 100% the first time and the phone lasted for a while.
Then after that it refused to charge at all. Didn't matter how many times I did the power + volume up trick.
I put the original battery back in, and it charges, but of course dies after it reaches 80%.
Same here. Problems after screen replacement month or two ago, not sure that related. Battery went bad. After replacement with a new one (original not chinies) not stable: shows 100% charge then turn off on in 10 min, after powered on again shows 65 % and after 10 minutes plugged in 100% charged.
Driving me crazy... Fully wiped, factory reset all the same. Rooted and wiped battery stats not helped. Very frustrating if some one can suggest one else can be done...
The phone is just fine, powerfull . no reasons to replace
I also developed my battery issue about a month after replacing the screen and digitizer. I'm going to take it apart and clean the connectors and see if that helps, because I'm so annoyed I'm about to buy a new phone.
My guess is that the battery was damaged during the screen/digitizer replacing process. It happened to me recently. No biggie 24 € for a new LG original battery seems pretty cheap and the problem was solved. But why are nowdays batteries somewhat soft??
Sent from my Nexus 4 using XDA Free mobile app
So following on from the issues with the Note this may seem like I am trolling but I am not.
I and my son have new S7 (not the Edge) on Vodafone. It is the best phone I have ever had both in terms of software and size. Fits my hand perfectly.
My son thinks the same however he is reporting that when the battery gets to about 30% the consumption/drain seems to get faster and the handset heats up. Typically around 1600 each day.
I don't get that as an issue. Occassionally the handset has heated up a bit but typically after heavy web use.
I have suggested he makes sure it is backing up and do a factory reset.
Any thoughts as to what may be causing the problem?
Navrig said:
So following on from the issues with the Note this may seem like I am trolling but I am not.
I and my son have new S7 (not the Edge) on Vodafone. It is the best phone I have ever had both in terms of software and size. Fits my hand perfectly.
My son thinks the same however he is reporting that when the battery gets to about 30% the consumption/drain seems to get faster and the handset heats up. Typically around 1600 each day.
I don't get that as an issue. Occassionally the handset has heated up a bit but typically after heavy web use.
I have suggested he makes sure it is backing up and do a factory reset.
Any thoughts as to what may be causing the problem?
Click to expand...
Click to collapse
Without knowing what apps he's got running it's not possible to know what's causing the issue. On a side note, you should top off your battery whenever you can. Letting the battery drain very low and then charging back to 100% will decrease the performance of the battery. Is he playing Pokemon perhaps? Cheers!
dynospectrum said:
Without knowing what apps he's got running it's not possible to know what's causing the issue. On a side note, you should top off your battery whenever you can. Letting the battery drain very low and then charging back to 100% will decrease the performance of the battery. Is he playing Pokemon perhaps? Cheers!
Click to expand...
Click to collapse
Thanks Dyno.
AS far as I know he is either in class at university or in the library. He will be using wi-fi to look up technical references as well as social media. I don't think it is heavy use as he should be studying!! He wont be playing Pokemon.
I'll pass on your comments/advice on the battery.
Try downloading malwarebytes from playstore! I just installed a rogue apk file called UPSM manager v.3.5 from apkfiles.com. Phone started to heat up without any usage . Checked GSam and my temps were at 36-37 c! And also warm to touch so i scanned my device with malwarebytes. Removed the malware and now my phone is back to 31-34c .Cool to touch ! Another advice is to disable fast charging and charge it whenever you can just like navrig said. Don't let it drain to below 40%. Once or twice won't hurt in a week but every day is going to wear and tear the battery life cycle. Hope this helps!
Navrig said:
So following on from the issues with the Note this may seem like I am trolling but I am not.
Any thoughts as to what may be causing the problem?
Click to expand...
Click to collapse
I'm having this problem also.