Develop Bugs

[Q] Odd Battery Charge Curve

hi all,
i noticed the charge curve on my evo is not linear. at first it's logarithmic and then linear (see pic). everything is off (3g/4g, wifi, bluetooth, sync) while charging (only turning on once in a while to check the %). is this normal?
ive wiped my battery stats and done all that. during use, the battery drops to 60% quickly and then discharges slower. im using deck's gb 1.3 rom, havent changed the kernel, no wake lock issues as far as i can tell.
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I was having the same exact issue. I bought a new battery and figured it must be bad when it would jump from 80 percent to full in a matter of minutes. Then it would discharge to around 70 percent in a matter of an hour. After it hit 70 percent it would discharge more slowly. This was a battery that the Sprint store gave me and I was led to believe it was new. After it did this weird charging discharging issue I went back to sprint and this time received a brand new battery in the package. The young lady behind the counter showed me a box full of all types of used batteries and explained they probably pulled one out of the box of the used batteries. I exchanged my original battery because it wasn't fully charging anymore but the weird charging spike I got with the replacement battery was a first for me. Anyway the "NEW" battery is working like it should so you may be looking at a bad battery.

I know you said you wiped battery stats but did you calibrate the battery at all?

oop. forgot all about this post. thanks for your responses.
i assumed something weird may have happened from my going stock to root so i checked out a friends battery. he never rooted his phone. unfortunately i get the same charge curve.
yes, i have calibrated my battery/ ie, charge to full, wipe stats, then drain phone til shut off.
i will try contacting sprint/htc for a new battery and see how that goes.
anyone else have this issue?

Me, all the time. Have yet to have a different curve ever. Mine happens a little higher though, around 70%. Try battery monitor widget and you can see the actual charging voltage
Sent from my PC36100 using XDA App

I use SetCPU with 3500mAh battery and last 28hrs on single charge
Sent from my PC36100 using XDA App

plobukt said:
oop. forgot all about this post. thanks for your responses.
i assumed something weird may have happened from my going stock to root so i checked out a friends battery. he never rooted his phone. unfortunately i get the same charge curve.
yes, i have calibrated my battery/ ie, charge to full, wipe stats, then drain phone til shut off.
i will try contacting sprint/htc for a new battery and see how that goes.
anyone else have this issue?
Click to expand...
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After you drain the battery completely, charge it to 100% without unplugging. Recalibrate with that method and see if it helps.
Supersonic Evo 4G | MIUI | Tapatalk

Battery Problem

Ok, take a loot at this screeny. I think my battery is either super decalibrated, or just bad. I've already let it run until the phone turned off, but I don't want to keep doing that as it's bad for the battery. (Super-saturation is not good for li-ion batteries) Any recommendations?
Edit: How about I actually attach the screenshot?
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Edit/edit: I'm charging this while I sleep. I don't know why the battery suddenly jumps up, either.

Have you tried wiping battery stats in recovery?
I know its an option in clockworkmod (under advanced I think)
-Nipqer

What the hell :S that is one confused battery you got there ! It goes down while charging then jumps up after :s is it stock battery ??

Nipqer said:
Have you tried wiping battery stats in recovery?
I know its an option in clockworkmod (under advanced I think)
-Nipqer
Click to expand...
Click to collapse
Yeah, I have. Unfortunately it didn't do anything.
noneabove said:
What the hell :S that is one confused battery you got there ! It goes down while charging then jumps up after :s is it stock battery ??
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I know right!! It's stock. No water damage, nothing like that...

What ROM are you on and has it done this for others? Have you considered clean install?
Sent from my HTC Vision using XDA App

noneabove said:
What ROM are you on and has it done this for others? Have you considered clean install?
Sent from my HTC Vision using XDA App
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It's done this for every rom. I'm on virtuous sense 2.0. I clean wipe before every rom, so I don't have the slightest idea what's going on here. Although last night I did test charging my extended battery and it would charge, then drain while still plugged in. I am mega confused.

had the same problem on my stock Dz a few months ago, battery would fluctuate like crazy (would drop to line 15-20% suddenly and then go back to 60% when phone was restarted) wiping battery stats would not fix it. Turned out to be a dud battery htc replaced it and all is fine.
If you want a more technical explanation every battery has a sensor in it which reports voltages to the phone which the phone then interprets as percentage battery left corresponding to the values stored in the battery stats file. Our battery sensor is malfunctioning and reporting weird values to the phone which the phone is showing as fluctuating battery level.
Hope that helps.

arpitnathany said:
had the same problem on my stock Dz a few months ago, battery would fluctuate like crazy (would drop to line 15-20% suddenly and then go back to 60% when phone was restarted) wiping battery stats would not fix it. Turned out to be a dud battery htc replaced it and all is fine.
If you want a more technical explanation every battery has a sensor in it which reports voltages to the phone which the phone then interprets as percentage battery left corresponding to the values stored in the battery stats file. Our battery sensor is malfunctioning and reporting weird values to the phone which the phone is showing as fluctuating battery level.
Hope that helps.
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Click to collapse
Gracias, dudeman. But I wonder why my [almost] new mugen-power extended battery does it too? Probably just a cheap battery.

nickeedoo said:
Gracias, dudeman. But I wonder why my [almost] new mugen-power extended battery does it too? Probably just a cheap battery.
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Click to collapse
A new battery act like this ? Strongly suggest u to return it ...

[Q] SOLVED! Battery loss after reboot- Any ideas?

I rooted my Evo for the first time 8 days ago and I really like the ability to control more features of the phone and being able to try different roms. Before rooting I had poor battery life and I had hoped that rooting would help. I have tried MikG's, Tomatos Classic, and I am currently on Decks 1.3 with the Lee kernel.
My battery life is still very poor. If I make some phone calls or use the web (even on wifi) it might last 3 hours. I've read for hours about doing radio updates, but I am on the current one as far as I can tell.
Also, when rebooting today I went from 53% battery life to 21%. The reboot was fast and took less than a minute. I will post some screens.
Any ideas on how to fix my issue?
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The only thing I can say is get a new battery cuz my bro has the epic and he had the same issue with it and he bought a hiperion battery and it hasn't did since .
Sent from my PC36100 using xda premium

I got a couple new anker batteries off ebay. They should be here monday or tuesday. I hope it does the trick.
Anyone have any other possible solutions?

Try calibrating your battery. Your batterystats.bin file is on the data partition iirc, so when you wipe data you wipe that file. Doing so creates a new file upon boot, and if you don't calibrate properly then you'll have weird issues such as the fluctuating battery reading. The best option is to either calibrate or only flash when you're at 100%. Try calibrating to get there, then when you wipe and flash only do so fully charged. If not wiping data, you should be fine.
There are guides available on calibrating the battery, as well as a battery calibration app.
If you're getting extra batteries, I'd invest in a wall charger as well if you don't get one with the batteries you ordered. Charging your batteries in an external charger will eliminate any battery stats issues in the future.
Good luck!
Supersonic Evo 4G | MIUI | Tapatalk

Thanks. A wall charger is included with my batteries. I have wiped battery stats and it didn't seem to help. I will try again in a few hours when I need a charge.
Sent from my PC36100 using XDA App

EvoJake said:
Thanks. A wall charger is included with my batteries. I have wiped battery stats and it didn't seem to help. I will try again in a few hours when I need a charge.
Sent from my PC36100 using XDA App
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Be sure to follow the full calibration technique. Charge to 100, wipe batterystats, drain without breaks, charge fully without breaks. Incorrectly calibrating will keep your phone in the same condition it was.
However the wall charger should eliminate those problems. If problems persist with all batteries after charging externally, it's something with your rom or your phone.
Supersonic Evo 4G | MIUI | Tapatalk

Im going to assume that the roms you are using are sense roms i know mikg is i tried it out with the anthrax kernal and had pretty good battery life. i have noticed though if you go with cm7.2 and a tiamat kernal i had the best battery. not sure if that will help or if it is a battery calibration issue.

I got the new anker batteries in the mail today. Charged one up and am trying it now. I will update later with the results.

Ok. So it was definitely a battery issue. On my second charge with my new anker batteries and after 11 hours of use im still at 68% battery life. So it has a potential to last 30 hours on one charge. I guess it just goes to show you that these batteries are meant to be replaced periodically. Thanks to all who tried to help me out!
Jake

I had very bad battery issues with my Evo 4g. bought 2 new batteries and now I get great battery life

Im currently at 40% battery life after 30 hours since charge. Little use though. Only 1.5 hours on calls and 1.5 hours with display on. And this is with a sense 3.5 rom! I wish I had bought new batts a while ago.

Did I get a defective battery?

Just got my s3 like a week or so. I made a mistake and not charge it initially (thought it was a myth). I used my battery all the way to 17%. Now my battery only average up to 2 hours screen on. My sister who also got the phone as the same time has about right hour screen on time. Did I screw up or it's just my battery being defective
EDIT: attached is the battery stats
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Sent from my SGH-T999 using xda app-developers app

What's brightness set to, and what are you doing while the screen is on? You on WiFi most of the time?

mt3g said:
What's brightness set to, and what are you doing while the screen is on? You on WiFi most of the time?
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Well, when I'm in door, I use low brightness most of the time. Only when I'm outside I would use auto brightness. Since I'm in wifi zone most of the time, yes I do have wifi on. I mostly use my phone for twitter, web browsing, and youtube, nothing heavy like gaming or benchmark.

Hard to say if its defective but I've definitely seen a lot better battery. It might not hurt to try and get a new one.
Sent from my SGH-T999 using xda premium

you should calibrate your battery a couple times once you get the phone. do it a couple times and it will fix itself. also check all your syncing settings. this phone will deplete a battery in 5-6 hours if fully charged and phone brightness is up all the way while watching videos.

Calibrating batteries is a myth from the days of older battery technology. Draining your battery to 0 on purpose is actually killing your battery faster because you just used up one cycle.

gr4p3s said:
Calibrating batteries is a myth from the days of older battery technology. Draining your battery to 0 on purpose is actually killing your battery faster because you just used up one cycle.
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Click to collapse
I think you're right
Sent from my SGH-T999 using xda premium

There's a bug on stock that makes cell standby much higher than it really is. So I wouldn't worry too much about that.
Also, Google Chrome is a huge battery killer for some reason. Consider switching to a different browser?

Still having the original battery in my vibrant and getting 8-9 hour charges while killing the battery 100% and charging it up once a week does nothing? Same thing for my g2x. I get about 10-11 hours on the thing daily original battery as well. If anything and you're not rooted to delete battery stats, its a good thing to do a couple times. I don't think I have hurt the battery at all, and if anything they still last very long...
Sent from my SGH-T999 using xda app-developers app

Galaxy S3 AT&T Battery Going Crazy

Hey all,
Let the following speak for itself:
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This started happening out of nowhere, a couple months back. My phone will lose battery at an incredibly fast rate, then swoop back up (without being plugged in), then fall, etc etc until it hits 0%. I can then turn it back on and it says 50% or what have you, and the same process repeats. These are the things I've tried:
1. Bought a new ZeroLemon battery because I thought my battery might be broken. All this served to do was increase the number of swoops. The battery still barely lasts half a day.
2. Cleaned the contacts of the battery and on the phone.
3. Installed all kinds of battery helpers and battery recalibration apps. Here's a screenshot of an app telling me, after I charged the phone to 100% (with a separate battery charger so I know it was at 100%).
It appears the phone is just reading the battery incorrectly. Not only does it report 60% but it also reports 3800 mV, which a fully charged battery should be around 4200 or 4300 correct?
4. Now here's the weird one: I blew on the contacts. This made things work better for a week or two. The new battery lasted about 3 days, which I thought was pretty good. Now it's back to where it was again.
It seems like I've tried just about everything, and it's a problem with the phone. Only problem is, as you can see, I have CM installed and the phone is over a year old, so any kind of warranty is long bye bye. Any suggestions my fellow S3 owners? I've tried googling this problem everywhere and it seems I'm the only one with it.
Thanks so much

dyno0919 said:
Hey all,
Let the following speak for itself:
This started happening out of nowhere, a couple months back. My phone will lose battery at an incredibly fast rate, then swoop back up (without being plugged in), then fall, etc etc until it hits 0%. I can then turn it back on and it says 50% or what have you, and the same process repeats. These are the things I've tried:
1. Bought a new ZeroLemon battery because I thought my battery might be broken. All this served to do was increase the number of swoops. The battery still barely lasts half a day.
2. Cleaned the contacts of the battery and on the phone.
3. Installed all kinds of battery helpers and battery recalibration apps. Here's a screenshot of an app telling me, after I charged the phone to 100% (with a separate battery charger so I know it was at 100%).
It appears the phone is just reading the battery incorrectly. Not only does it report 60% but it also reports 3800 mV, which a fully charged battery should be around 4200 or 4300 correct?
4. Now here's the weird one: I blew on the contacts. This made things work better for a week or two. The new battery lasted about 3 days, which I thought was pretty good. Now it's back to where it was again.
It seems like I've tried just about everything, and it's a problem with the phone. Only problem is, as you can see, I have CM installed and the phone is over a year old, so any kind of warranty is long bye bye. Any suggestions my fellow S3 owners? I've tried googling this problem everywhere and it seems I'm the only one with it.
Thanks so much
Click to expand...
Click to collapse
I'm not sure exactly how to fix your problem, but just wanted to state that battery helping apps and calibration apps are bogus, they serve no purpose!

DMF1977 said:
I'm not sure exactly how to fix your problem, but just wanted to state that battery helping apps and calibration apps are bogus, they serve no purpose!
Click to expand...
Click to collapse
I also forgot to mention that I have tried formatting everything and installing a different ROM etc etc. Is there any option short of buying a new phone?