[Q] Kernel is Consuming 80% of the Battery - G2 Q&A, Help & Troubleshooting

Hi there. Could anyone check what is wrong with my phone please? I had it at 100% at around 1pm today. Been using WIFI at the office(no data btw), internet browsing for about 5 minutes every hour, screen brightness always at 20%. Good phone radio signal. However, I noticed something is wrong. I a bit surprised it already consumed 30% of power in a matter of 2 hours. It usually consumes 20% battery every 5 hours, and that includes 5 minutes of Clash of Clans, 10 minutes of net browsing and FB in an hour. But today I just let it sit on the table and check the drain. It's like losing 1% every 5 to 10 minutes:
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My charging habit though, I let it go down between 10% to 20% before I charge, sometimes I forget to pull it from the socket for 30 minutes (do all modern gadgets have safety off feature?), and sometimes I charge it to full even if it has still 60% remaining. I got the phone last November 8. It shouldn't be discharging this fast, right?

To the charging part: you can charge your phone whenever you want! the only thing that these batteries dont like is getting it under 15% and letting it charging after it reached 100% for too long but no matter if you have 60% or 20% you can charge it
Lithium batteries info

Kalaidos said:
To the charging part: you can charge your phone whenever you want! the only thing that these batteries dont like is getting it under 15% and letting it charging after it reached 100% for too long but no matter if you have 60% or 20% you can charge it
Lithium batteries info
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But why is it draining too fast while on wifi only?

Anyone? Been searching the net but couldn't find any answers.

If nothing helps, try performing a factory reset.

The weird thing is, this happens only when i am using the office wifi. At home, i get only 3% drain overnight.

Look at "Held Awake". Use BetterBatteryStats to find out which app doesnt allow your phone to sleep.

yonba said:
The weird thing is, this happens only when i am using the office wifi. At home, i get only 3% drain overnight.
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I had the same problem on my work wifi and it was because of the way the wireless access point is set up. The router sends broadcast msgs to all the clients, sort of a keep-alive ping, therefore draining your battery, since the phone responds to those broadcast msgs and it never allows the wifi to enter power save mode or sleep.

Related

Horrible battery

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Take a look I am running SC 2.4 and I had my data on and I went to 79 percent battery in a little over an hour mostly on standby just now I charged my phone to 100 percent and its at 90 while leaving wifi on and a phone call
Sent from my SCH-I500 using XDA App
EB01 has a bug in its sensor code, so turning off AutoRotate will help. It's still not a WHOLE lot better, but it's at least serviceable that way.
Hopefully, the rumors about the update/OTA were true, and we'll see an updated build (EB09 is sticking in my brain for some weird reason, but don't take that as anything real) that fixes the sensor code and anything else that's eating up battery.
Did you do all the flashing when at 100% battery? It's possibly your battery stats are just inaccurate.
Let the phone charge to 100%, then with the phone still plugged in, shut it down so you get JUST the charging screen, and let that go to 100%. Then, boot into CWM and delete battery stats, and then go back to the powered-off-charging-screen and let it go back to 100%, then boot back into your OS. Some people recommend draining the battery most all the way, then charging it back up, but I'm not sure if that's really necessary.
Also, apparently there's a GPS bug in EB01 which causes it not to sleep, which'll drain your battery fast as well (though I don't see the GPS icon on your screen). You might also have some battery hog in the background slaughtereing battey life (the battery use screen might be able to lend some help for that).
Try using an app called juice defender, I found it to help my battery a lot.
SC 2.4 hides the icon.
I was getting a wakelock from Android System earlier today, but that has finally resolved itself and my phone is sleeping now.
I am not a noon so I know about wiping batt stats and did that I have used juice defender before but I just don't see a whole reason that it should drain that quick
Sent from my SCH-I500 using XDA App
No issues with battery life AT ALL with EB01. In fact, the BEST battery life I've EVER gotten, even better than Adrynalyne's UV kernels (no offense bud)
Yesterday, I unplugged around 10, got off work work at 830, was home by about 930, and STILL had some 34% left, 11 hours later. I'VE NEVER been able to go that long on a single charge. And I leave auto-rotate on.
What REALLY helped me, was turning off the GPS when not in use. MAN....what a difference !!!!

Phone turning off at 50% battery life

For the last week or so, I've noticed that my phone now powers off at 50% battery life.
Battery Monitor Widget reports the battery still having ~1000mah at this level, but the phone just dies. I feel like this is incorrect, because sometimes if I run it down slow near 50%, it will do that thing where it will flash RED on the LED when you plug it in for the first time (super low battery indicator).
I'm running AOKP 4.2.2 MR-4, but i've tried a few different roms, dirty and full wipe (factory clean), along with various kernels, but my phone continues to die at 50%.
Any ideas on how to fix this?
See attached screen shot for what I"m talking about. Battery drain will look fine, then all of a sudden, BOOM 0 percent, and I have to charge it.
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Yikes, definitely something going on there. Are you running a custom Rom?
Sent from my Nexus 4 using Tapatalk 2
thatguy188 said:
Yikes, definitely something going on there. Are you running a custom Rom?
Sent from my Nexus 4 using Tapatalk 2
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Just went completely back to stock and then put the latest AOKP back on. Still seeing some weirdness. It's like it doesn't even use half the capacity of the battery (see discharge/charge graph)
h41cyon said:
Just went completely back to stock and then put the latest AOKP back on. Still seeing some weirdness. It's like it doesn't even use half the capacity of the battery (see discharge/charge graph)
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If I had to guess, I would say you battery stats file is out of sync. After flashing different ROM's on a G1, I would have to re-calibrate the battery stats by letting the phone battery slowly die (phone powers off), then fully charge while phone was still off (8-12 hours), turn back on and repeat one more time. The stats file would fix itself.
I'm experiencing the same issue, but mine is not as severe. I've dropped as much as 25% battery, but the phone has never reached auto shut down. I'm worried that this issue will cause the red light of death.
SpookyTunes said:
If I had to guess, I would say you battery stats file is out of sync. After flashing different ROM's on a G1, I would have to re-calibrate the battery stats by letting the phone battery slowly die (phone powers off), then fully charge while phone was still off (8-12 hours), turn back on and repeat one more time. The stats file would fix itself.
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yea def sounds like battery stats not updating properly

Do the charger not shutoff when the battery is full?

Since I got this phone I have found the battery life to be quite good, although for some reason the battery stays above 100% for a long time once taken off the charger. All other Android phones I have owned have always quickly dropped down from 100 to about 90 before leveling off to a more linear discharge speed. One thing I noticed that seems strange on this phone is that it seems like the longer I leave the phone on the charger, the longer the battery reading stays at 100%. This should not be the case if the battery signals to turn off the charger. To test this theory I have done the following:
Charge overnight for a week. Results: battery stays at 100% for 3-5 hours once coming off the charger
Charge when I get home from work and unplug shortly after reaching 100%. Results: battery drops from 100% to 99% within a half hour
Charge the battery to 100%, then leave it plugged into a USB to slowly keep charging for another 12 hours. Result: battery stays at 100% for 10-12 hours before dropping to 99% Here are some screenshots to show the battery staying at 100% for a long time:
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So now I am kinda worried about overcharging the battery and either blowing it up or destroying its lifetime. Any thoughts on this?
I don't think you have to worry about over charge. More than likely the battery just isn't calibrated properly. You can try to do that manually, though I'm not sure how much it'll help...my G2 also seems to stay at 100% for a long period of time.
Sent from CAMACHO, my Verizon G2 (VS980) running PAC ROM.
They all have a magic 100% and crap last 5%.The charger does trickle and shut off. Watched it with mA reader. It's just poor calibration. Don't even worry about it.

[Q] Battery Calculation Broken?

This has happened multiple times on my Galaxy s4. Today was the worst however. My phone was on 51% battery (supposedly) and then, the phone just turns off while I was in an app, without any kind of low battery warning, it was running as normal before this happened, I start the phone up again and bam, 1% battery remaining. Here it is on the battery screen:
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My battery was dead by 2pm in the day which is also significantly worse than normal. This is with just 45 minutes screen on time:
and just 7 hours on battery:
And with no apps sucking up battery life.
Has anyone had this issue before and is there any possible way to fix this?
Charge to 100%. Pull battery. Put it back in and charge it again while off to 100%. If that doesnt fix it then get a new battery.
epicflyingcat said:
This has happened multiple times on my Galaxy s4. Today was the worst however. My phone was on 51% battery (supposedly) and then, the phone just turns off while I was in an app, without any kind of low battery warning, it was running as normal before this happened, I start the phone up again and bam, 1% battery remaining. Here it is on the battery screen:
View attachment 2850747
My battery was dead by 2pm in the day which is also significantly worse than normal. This is with just 45 minutes screen on time:
View attachment 2850751
and just 7 hours on battery:
View attachment 2850748
And with no apps sucking up battery life.
View attachment 2850750
Has anyone had this issue before and is there any possible way to fix this?
Click to expand...
Click to collapse
Hi ,
It could be lots of things...battery , phone not going in deep sleep , settings
First thing I would do is use an app like Better Battery Stats and really see what is going on ( kernel wakelocks) , who is keeping the phone up all the time , then i would review all my settings like FB , mail , location ...any syncing related app that may be going crazy and of course battery may be going bad
Look like a bad/faulty battery for me.
Sent from my GT-I9500
Keep in mind that battery percentage is never 100% accurate. All devices with batteries (with a percentage meter) has this.
But yeah, use better battery stats to check wakelocks.
Also a trick to calibrate the fuel gauche chip is to take out the battery for 3-5 minutes. It will be more calibrated than before.

Incorrect Battery Reporting | % Skipping | Dead @ 12%

Battery would fall 2% on the screen, it shows in battery reporting you can see the line drops steeply within 1 minute then stays stable (ignore the part where my device was asleep).
been very inaccurate with reporting % it randomly died at 12% (lowest its been since i got it 3 weeks ago) and when i power back on its at 2%. i charged back up to 40% and let it drop to 12% and the same happened.
i could live with the 3hr SOT if i got a good report of how much % was left so i can conserve usage if need be.
Running stock oxygen 2.1.1
then rooted and installed AK kernel (SOT is a little better) but still % dropping. i even super underclocked and saw the same effect
sent a ticket to OP - hoping its a defect and they can replace it
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LOGMD said:
Battery would fall 2% on the screen, it shows in battery reporting you can see the line drops steeply within 1 minute then stays stable (ignore the part where my device was asleep).
been very inaccurate with reporting % it randomly died at 12% (lowest its been since i got it 3 weeks ago) and when i power back on its at 2%. i charged back up to 40% and let it drop to 12% and the same happened.
i could live with the 3hr SOT if i got a good report of how much % was left so i can conserve usage if need be.
Running stock oxygen 2.1.1
then rooted and installed AK kernel (SOT is a little better) but still % dropping. i even super underclocked and saw the same effect
sent a ticket to OP - hoping its a defect and they can replace it
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By what I read, it's a normal behavior when device wakes up from sleep.
It seems that, when device is asleep, even battery stats aren't updated, to avoid unnecessary drain. So, once it wakes up and you use it for couple minutes, android get a chance to record stats and update actual battery percentage.
Again, this is the explanation I read on such a question, and it does makes sense.
Hetalk said:
By what I read, it's a normal behavior when device wakes up from sleep.
It seems that, when device is asleep, even battery stats aren't updated, to avoid unnecessary drain. So, once it wakes up and you use it for couple minutes, android get a chance to record stats and update actual battery percentage.
Again, this is the explanation I read on such a question, and it does makes sense.
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i managed to underclock enough to make the other percentages to show up - so it is working just i guess polling is slow.
the 12% dead battery isnt normal though. havnt had it since then but if reset a few times. now switched to a custom rom (keep loosing LTE) but ill figure it out, thanks!

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