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[Q] Will battery calibration write the new battery file if Fast Boot is checked?

When I calibrate via Battery Calibration after reaching a 0mA remaining charge via that Current Widget, since it takes a full minute or more of heavy lifting to do a real reboot, it's already at 46,000mA by the time i'm back up.
Will the fake/quick reboot i.e. Fast Boot still write the new file?

I think it writes a generic one till it gets real stats. Not sure on this though and I welcome someone to correct me as I have also been interested in this.
Sent from my HTC One X using Tapatalk 2

People who have performed the calibration: what does your mA meter in the Current Widget read after you boot back up?
also, I think I flashed 1.82 from Scotts collection of kernels after the fact, is this making things worse?
Halp if I don't get to at least 4 hours screen time with such minimal settings (i'm on 20% brightness ffs) I may have to return this beauty

Battery calibration is a myth... FYI... sigh. Are battery are Li-ION base they can't be calibrated. There's multiple factual sites that can confirm this.

theartialmartist said:
People who have performed the calibration: what does your mA meter in the Current Widget read after you boot back up?
also, I think I flashed 1.82 from Scotts collection of kernels after the fact, is this making things worse?
Halp if I don't get to at least 4 hours screen time with such minimal settings (i'm on 20% brightness ffs) I may have to return this beauty
Click to expand...
Click to collapse
Have you tried doing a battery test using htc diag? if not, the process of doing so is as follows:
-Charge your phone to full. (wait till LED light is green)
-Activate airplane mode by going to settings.
-try to kill as much running apps as you can in the background. Don't worry about some of them restarting.
-dial *#*#3424#*#* then select agree.
-select "more" below, and then select battery test. follow the on screen instructions afterward.
-make sure that you check your results exactly after 1 hour later because the screen will stay on even the test is done. So your results might show a different number.
If you get a result lower than 85, you might want to consider exchanging your phone for a new one, or doing a factory reset and trying this test again. In case you are curious, I did the test earlier today to check how mine is doing and got a result of 92. Let us know your results if you indeed do the test.

JCon0320 said:
Have you tried doing a battery test using htc diag? if not, the process of doing so is as follows:
-Charge your phone to full. (wait till LED light is green)
-Activate airplane mode by going to settings.
-try to kill as much running apps as you can in the background. Don't worry about some of them restarting.
-dial *#*#3424#*#* then select agree.
-select "more" below, and then select battery test. follow the on screen instructions afterward.
-make sure that you check your results exactly after 1 hour later because the screen will stay on even the test is done. So your results might show a different number.
If you get a result lower than 85, you might want to consider exchanging your phone for a new one, or doing a factory reset and trying this test again. In case you are curious, I did the test earlier today to check how mine is doing and got a result of 92. Let us know your results if you indeed do the test.
Click to expand...
Click to collapse
thank god there's a semi scientific independent way to verify this. ill run it asap. just to be clear, I just read about this test elsewhere and they mentioned a "score" of 85 vs the battery percent being below 85% after completion, can you clarify? does it matter that im already on cleanrom lite 3.0?
im now suspecting the issue is a combination of sense, 4g and spotty wifi coverage a(considering investing in a new bad ass router with dd-wrt aftermarket firmware)

theartialmartist said:
People who have performed the calibration: what does your mA meter in the Current Widget read after you boot back up?
also, I think I flashed 1.82 from Scotts collection of kernels after the fact, is this making things worse?
Halp if I don't get to at least 4 hours screen time with such minimal settings (i'm on 20% brightness ffs) I may have to return this beauty
Click to expand...
Click to collapse
"Screen on" time is going to vary depending on your usage/signal quality/hardware requirements/etc.
My question(s) is, do you let the phone sit on the charger for any amount of time after it has reached a "full" charge? Also, how many charge cycles have you gone through (after installing a new ROM) before you make these assumptions? Do you use WiFi regularly or mostly mobile data? What are your "sync" settings? What is the ratio between your "Screen-on" time to your "Standby/Idle" time?
If you take a look over in the "Battery Stats Thread", you might see that, depending on your usage (and other variables) 4 hours screen time is not that bad.
Also, as others have mentioned, "calibrating" a battery (which is essentially deleting the "battery stats" file) is not necessary.
http://www.androidcentral.com/wipin...tery-life-says-google-engineer#comment-363054

live4nyy said:
"Screen on" time is going to vary depending on your usage/signal quality/hardware requirements/etc.
My question(s) is, do you let the phone sit on the charger for any amount of time after it has reached a "full" charge? Also, how many charge cycles have you gone through (after installing a new ROM) before you make these assumptions? Do you use WiFi regularly or mostly mobile data? What are your "sync" settings? What is the ratio between your "Screen-on" time to your "Standby/Idle" time?
If you take a look over in the "Battery Stats Thread", you might see that, depending on your usage (and other variables) 4 hours screen time is not that bad.
Also, as others have mentioned, "calibrating" a battery (which is essentially deleting the "battery stats" file) is not necessary.
http://www.androidcentral.com/wipin...tery-life-says-google-engineer#comment-363054
Click to expand...
Click to collapse
I let the phone charge to very close to 0mA via current widget
I don't see how a particular ROM needs to learn your battery stats - if calibration isn't necessarily (I do it anyway with a new rom,) what does the ROM have left to learn?
Mix of wifi and mobile
auto syncing one email address + contacts
ratio is at 6.5 (total time/screen on time)
can you comment on the *#*#3424#*#* battery test? is it accurate?

theartialmartist said:
thank god there's a semi scientific independent way to verify this. ill run it asap. just to be clear, I just read about this test elsewhere and they mentioned a "score" of 85 vs the battery percent being below 85% after completion, can you clarify? does it matter that im already on cleanrom lite 3.0?
im now suspecting the issue is a combination of sense, 4g and spotty wifi coverage a(considering investing in a new bad ass router with dd-wrt aftermarket firmware)
Click to expand...
Click to collapse
I am not sure if I understood your question correctly. If you could point me to that article that you are talking about, that would help. To answer your question, It doesn't matter what your ROM is. I am running sick sense when I did the test. As for the accuracy of the test and why I said that the baseline score is at least 85, most if not all of the people who performed this test who claimed to have good to great battery life had a score of at least 85. So it is reasonable to think that getting a score that is on par with most rules out the issue of having a faulty battery.
In my opinion, most of the battery issues that us ATT one X owners face, especially those that are in LTE areas are software related. In my knowledge, the main thing that influences the battery life apart from the actual battery is the kernel and the radio. At the moment, we do not have the source for the kernel yet. So, it cannot be truly optimized beyond the current tweaks that are being done by the wonderful devs. Until the source is released, I think that flashing a good radio, (new leaked 2.09 for AT&T) using a cpu editor, and following simple battery saving strategies is the way to go... And before I end this, I just want to mention that calibrating the "battery" is impossible. The only thing that can be calibrated is the "battery meter" on every ROM.

theartialmartist said:
I let the phone charge to very close to 0mA via current widget
I don't see how a particular ROM needs to learn your battery stats - if calibration isn't necessarily (I do it anyway with a new rom,) what does the ROM have left to learn?
Mix of wifi and mobile
auto syncing one email address + contacts
ratio is at 6.5 (total time/screen on time)
can you comment on the *#*#3424#*#* battery test? is it accurate?
Click to expand...
Click to collapse
It's not the "ROM" per se, but rather just allowing the phone build "cache".
In other words, when you install a new ROM, sometimes you need to format it first, so all the cached files will be deleted. So when you first use the phone after installing a new ROM you might spend a lot of time re-installing apps and the phone is building cache which takes energy writing the files, not a lot but I feel it might be significant enough to wait until at least the 3rd charge cycle, once you have your apps and widgets set up. For example, the gallery app needs to save the thumbnail cache and so on. I hope that makes sense.
Of course, this would be irrelevant if you were just updating your ROM but I thought I'd mention it anyways. Going back and re-reading your situation I think it might be some other software issue that is draining your battery, not the battery calibration. As for the dial code, I wouldn't know, sorry. Hope you figure it out, I just don't think it's worth the time to stress over "battery calibration/stats", it is more likely a kernel/ROM issue or a hardware issue (the battery itself).
---------- Post added at 09:02 PM ---------- Previous post was at 09:00 PM ----------
JCon0320 said:
In my opinion, most of the battery issues that us ATT one X owners face, especially those that are in LTE areas are software related. In my knowledge, the main thing that influences the battery life apart from the actual battery is the kernel and the radio. At the moment, we do not have the source for the kernel yet. So, it cannot be truly optimized beyond the current tweaks that are being done by the wonderful devs. Until the source is released, I think that flashing a good radio, (new leaked 2.09 for AT&T) using a cpu editor, and following simple battery saving strategies is the way to go... And before I end this, I just want to mention that calibrating the "battery" is impossible. The only thing that can be calibrated is the "battery meter" on every ROM.
Click to expand...
Click to collapse
^
^
Yeah, what he said.

The cache things makes perfect sense. Happy to report I got a score of 92 percent after the battery test! Now playing with settings. I changed to a new no-lte apn and got really spotty coverage and endless disconnections. Can someone post their best 4g, 3g and 2g apns?
Besides flashing the new 2.0 or whatever kernel can somebody recommend anything else to save battery? A link to a good launcher?

theartialmartist said:
The cache things makes perfect sense. Happy to report I got a score of 92 percent after the battery test! Now playing with settings. I changed to a new no-lte apn and got really spotty coverage and endless disconnections. Can someone post their best 4g, 3g and 2g apns?
Besides flashing the new 2.0 or whatever kernel can somebody recommend anything else to save battery? A link to a good launcher?
Click to expand...
Click to collapse
Apex Launcher. It improves battery life quite a bit (in my experience anyways). Also, go through the "Sense" applications, like Weather and Stocks, and make sure you disable sync for them since you can't use the Sense widgets in a 3rd party launcher. You can do it by going to [Settings > Accounts & sync] and selecting each one then making the appropriate changes.

Battery problem

Hello, i'm a newbie to xda developers... I had some problems with my Sensation... I am really a newb to those stuff since i never rooted a phone... The problem with my phone is that the battery doesn't slowly drain... I let it to charge for like 5 hours to get to full 100% and then from 100% it goes to 60% in like 10-20 minutes while i use it ... Other times the battery shows to have more power and other times it straightly goes to 40% from 100%... It drains so quickly i can't even go outside with my phone since its battery gets empty... Sometimes, even if the phone is 60% it randomly shuts down and have to restart it for like 5 times to get it work for at least 10 minutes. Might it be the battery? I tried going to recovery mode but i get the red triangle with an exclamation sign in it... Any reply is appreciated, thanks!

Maybe your battery is rubbish and you should just buy another one.
Although is one thing you should try first, recalibrate your battery.
What all these methods amount to is how to teach your phone about battery performance. Calibration is about enabling your phone to provide accurate estimates of remaining battery charge and will not, in and of itself extend the usage you get on a single charge (though it may possibly prevent the phone going into power save modes prematurely, wrongly believing the battery to be lower on power than it is).
The phone stores information about the battery in a file called batterystats.bin which sits in /data/system. Normally you won't have direct access to that file, but you could find it with an app such as root explorer, which allows complete access to the phone's file system.
When you install a new ROM, or a new battery, or perhaps periodically as the battery ages and performs differently, you need to get a new set of battery performance statistics.
By charging the phone to 100% you are starting at the known maximum for the battery. At this point, the batterystats.bin file needs to be deleted, which forces the phone to recreate the file from scratch, using the information it is about to collect. It doesn't matter what method you use, battery calibration app, or from within recovery - they all do the same thing and delete this file.
The phone is then allowed to drain fully. This gives the other end of the scale, the known minimum. The phone then has then experienced the full charge/discharge cycle of the battery and stored that performance information in a new version of the batterystats.bin file.
Now that the information has been saved, the phone will (hopefully) be able to provide accurate estimates of the battery charge level, regardless of how much of the battery charge you use before reconnecting the charger.
If you don't have root access you can download an app from the market called "Battery Calibration". It does the same thing, deletes the batterystats.bin.
If I helped you in any way hit the THANKS button
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Device: Sensation 4G
ROM: Hyper Non Sense v3.3
Kernel: Faux 009b4 (edited by Yank555)
Radio: 11.24A.3504.31_M
RIL: 4.0.0037HMQ
Recovery: 4EXT_Recovery_Touch_v1.0.0.5_RC5
Battery: Anker 1900

Thank you for your time. You explained really well and i appreciate that... So, to use the calibration apps i need to have root access... should i search a tutorial on that or is there one on the forums? If the calibration can't fix it, should i get another battery? Thank you again! Maybe i should try to buy a new battery first... is rooting safe? can i get back to my old firmware?

Smexhy said:
Thank you for your time. You explained really well and i appreciate that... So, to use the calibration apps i need to have root access... should i search a tutorial on that or is there one on the forums? If the calibration can't fix it, should i get another battery? Thank you again!
Click to expand...
Click to collapse
Well, yes I guess you should root your phone first, but I'm not sure
A guide on how to root your Sensation can be found here .You should only do the steps 1-3.
If you don't want to root there is another method somebody wrote (I haven't tested it personally)
1. Turn off your phone.
2. Fully Charge.
3. When getting 100% signal, unplug quickly.
4. Pull off the battery and put it anywhere.
5. Wait for 180 seconds minimum
6. Put back the battery on the right side.
7. Turn on the phone.
Than you should be OK:good:
If you get the same result after "battery calibration" I suggest you buy another battery.
Hit THANKS if I helped you

Hello, i have two more question related to this thread... Is there a way to calibrate my battery without root access? And will buying a new battery surely fix my problem? Thanks again!

You might be able to get a calibration application in the playstore. However most I've seen require root access. But look, they're might be some without root requirement. As for your second question. Nothing is ever 100% guarantee that it will solve the issue. These are suggestions based on the information you provided regarding your issue . How can anyone be 100% certain that will solve your issue. It's defiantly a possibility it will solve the problem but no, for 100% certainty, I don't think anyone can say that. It's defiantly worth a try ! Then you can see if getting the battery solved the problem. I hope it does fix your issue and wish you the best .like I said, no one can be 100% sure but it's defiantly worth trying!Sent from my HTC Sensation 4G using xda premium

Everything said in this topic is PURE NONSENSE. It was even featured on the front page that wiping the battery stats DOES NOT DO ANYTHING. See this article for more information > http://www.xda-developers.com/andro...-battery-stats-does-not-improve-battery-life/
The only thing you CAN do is charge your battery to 100%, and let it drain to 0%.

Aparently, after i cleaned my battery contacts it DOESNT jump to random values... drains continously.. SO i think the problem is fixed... atleast for a while! I'm new using a smartphone and the battery is a little 2 weak as i was used to my other non-smartphones... I think that's the battery life a 1520AMH can offer me on a sensation! The uptime for it was 6 hours from 100%... thats really weak ( i used the web and games).

[Q] help? Batterry precentage

Hi Guys, i'm noob, i wana ask about my htc sensation, after 2 year i'm using it, today i found
when battery charging (htc Senstaion) dismiss displaying percentage of battery after i restarting while charging.
****battery charging ------> Battery percentage displaying 60% then i restarting the phone while this situation
and then when phone finish restarting and ready to use battery precentage displaying 100%(full)
is it normal?
sorry my english bad

Boot into recovery and wipe battery stats.
Sent from my HTCSensation using XDA Premium 4 mobile app

if not all many users(including me) have this situation
it is a htc's common issue after rooting the device
there is no a solution yet
it is just a percentage misreading
by the way i don't know if wipe battery stats will help

rzr86 said:
if not all many users(including me) have this situation
it is a htc's common issue after rooting the device
there is no a solution yet
it is just a percentage misreading
by the way i don't know if wipe battery stats will help
Click to expand...
Click to collapse
After rooting??? R u sure about that ??
I was suffering same issue before rooting and after rooting..
Wipe battery status is useless here ..
Its HTC's fault....

Itsakash said:
After rooting??? R u sure about that ??
I was suffering same issue before rooting and after rooting..
Wipe battery status is useless here ..
Its HTC's fault....
Click to expand...
Click to collapse
before rooting?
for me that never happened
also wipe battery stats is useless and indeed it is htc's fault

rzr86 said:
if not all many users(including me) have this situation
it is a htc's common issue after rooting the device
there is no a solution yet
it is just a percentage misreading
by the way i don't know if wipe battery stats will help
Click to expand...
Click to collapse
Just a percentage misreading? But if the phone thinks it's at 100% won't it stop charging then?

emrvb said:
Just a percentage misreading? But if the phone thinks it's at 100% won't it stop charging then?
Click to expand...
Click to collapse
probably it stops
i am not sure about that
edit: the point is the battery is increasing its percentage slower when it passes 60%-70%
but it charges the same
so if you reboot the device then it jumps at 90% or full charge

rzr86 said:
probably it stops
i am not sure about that
edit: the point is the battery is increasing its percentage slower when it passes 60%-70%
but it charges the same
so if you reboot the device then it jumps at 90% or full charge
Click to expand...
Click to collapse
Is it known what causes this?
Someone above said "it is a htc's common issue after rooting". Is there any source on that? For all I know, percentage of charge of battery is determined by a combination of output voltage and amps, preferably referenced by a table taking battery age into account (correct me if I'm wrong though).
Rooting the device should not be an issue, unless HTC did something in their rom to detect this and let the battery percentage be wrong. Then again, most of us aren't on the stock rom. To be on another rom, the bootloader needs to be unlocked. Did HTC do something that unlocking the bootloader makes voltage/discharge readings unreliable? I doubt that...
I'm interested in this because I unlocked and flashed a Sensation XE for a friend of mine (SultanXDA's KitKat rom), but the battery discharges very, very fast, without an obvious cause. So I wonder whether it could be the battery is not fully charged and/or the phone decides it's empty to early.

"it is a htc's common issue after rooting"<- i said that
it was a source but i can't find it now
also i don't know if htc did something with unlocking the bootloader by purpose
if you flashed the rom recently don't judge the battery too early
give it 4-5 cyrcle charges until it settles down then see how it goes

emrvb said:
I unlocked and flashed a Sensation XE for a friend of mine (SultanXDA's KitKat rom), but the battery discharges very, very fast, without an obvious cause. So I wonder whether it could be the battery is not fully charged and/or the phone decides it's empty to early.
Click to expand...
Click to collapse
I have exactly this problem.
It sounds like the same ROM, Saltan kit kat. I am using the latest kernal 3.4, having tried two kernals I get the same results. For example I charged the phone to full, and after 2 hours of use I'm down to 55%, WiFi on and browsing, gmail synced but not much else, screen brightness turned down etc.
I only flashed a couple days ago, will it improve massively over the next few days?
The phone was giving a days charge easily before flashing.
I am also noticing a message saying 'unfortunately process com.android.phone has stopped working' (or similar). When this happens and I click OK I notice the signal disappears for a few seconds before coming back. Could this be the cause of the problem?
Could it be he ROM?
I'm new to all this but managed to unlock, root, flash recovery, and flash the ROM thanks to the brilliant guides on XDA. Any help with the above would be appreciated.
Rob

i am facing the same problem , rather my problem is goes much further .
iam on stock ROM and not rooted my sensation. my device often restart automatically even when battery is about 90% or battery is 40% and it continue this from last 2-3 months.
and after restarting battery percentage is also changed, see attached pics.
i am tired of this rebooting , i observed that restaring is mostly when i connect to calls or text msgs.
can somebody pleeeeeeaase help me.

tAheEr73 said:
i am facing the same problem , rather my problem is goes much further .
iam on stock ROM and not rooted my sensation. my device often restart automatically even when battery is about 90% or battery is 40% and it continue this from last 2-3 months.
and after restarting battery percentage is also changed, see attached pics.
i am tired of this rebooting , i observed that restaring is mostly when i connect to calls or text msgs.
can somebody pleeeeeeaase help me.
Click to expand...
Click to collapse
since you are completely stock then the only thing i can tell you is to check your battery if it fits correctly
also how old is it?

rzr86 said:
since you are completely stock then the only thing i can tell you is to check your battery if it fits correctly
also how old is it?
Click to expand...
Click to collapse
thanks for ur reply ,
i have inserted plastic card behind battery for proper contact (adviced by many people at xda) but problem is not solved. my battary is 6 month old.
may be it is battery as i purchased from local market.
i have ordered new battery and soon will recive that . will let you know.
i have observed that mostly mobile got restart when i make/recieve calls and sms.

Spawn-uk- said:
I have exactly this problem.
It sounds like the same ROM, Saltan kit kat. I am using the latest kernal 3.4, having tried two kernals I get the same results. For example I charged the phone to full, and after 2 hours of use I'm down to 55%, WiFi on and browsing, gmail synced but not much else, screen brightness turned down etc.
I only flashed a couple days ago, will it improve massively over the next few days?
The phone was giving a days charge easily before flashing.
I am also noticing a message saying 'unfortunately process com.android.phone has stopped working' (or similar). When this happens and I click OK I notice the signal disappears for a few seconds before coming back. Could this be the cause of the problem?
Could it be he ROM?
I'm new to all this but managed to unlock, root, flash recovery, and flash the ROM thanks to the brilliant guides on XDA. Any help with the above would be appreciated.
Rob
Click to expand...
Click to collapse
Does anyone have any ideas? Today the phone lasted around 12 hours but with minimal use which isn't really good enough. I thought rooting and flashing would improve battery life but so far I am disappointed. I may try another ROM tomorrow.
Rob

i'm try to buying new original batery but still same problem,
now i'm trying viver rom sc.5.1, with last Sebastian FM kernel
this rom verry awesome i'd like this but baterry percentage still problem:
----------------------------------------------------------------------------------------------------------------------------------------------------------
DEVICE: HTC Sensation Z710e
PREVIOUS ROM:Rooted Stock Rom ICS Sence 3.6
CURRENT ROM:ViperS 5.1.0 JB Sense 5
FIRMWARE:3.32.401.5
PREVIOUS KERNEL: htc kernel
CURRENT KERNEL:kernel 3.4.10 by SebastianFM
BOOTLOADER:unlocked
HBOOT VERSION:1.27.0000
RECOVERY:4EXT recovery touch v.1.0.0.6 RC1
S-ON
Thanks
for all REPLY

tAheEr73 said:
thanks for ur reply ,
i have inserted plastic card behind battery for proper contact (adviced by many people at xda) but problem is not solved. my battary is 6 month old.
may be it is battery as i purchased from local market.
i have ordered new battery and soon will recive that . will let you know.
i have observed that mostly mobile got restart when i make/recieve calls and sms.
Click to expand...
Click to collapse
This really sounds like your battery, especially if it's not the original or equivalent. But, it could also be an app on the background, keeping your phone from "deep sleep". Bad cell coverage (very low signal) also drains your battery relatively quickly when you're on 3G. A good WiFi connection consumes less power than 3G with bad signal. Another possibility could be (but unlikely) is that your phone is intended for another region and thus having trouble communicating with the GSM network.
- Check your battery.
- Check what your battery is used for.
- Check your battery time with network set to GSM only.
---------- Post added at 10:21 PM ---------- Previous post was at 10:04 PM ----------
rzr86 said:
"it is a htc's common issue after rooting"<- i said that
it was a source but i can't find it now
also i don't know if htc did something with unlocking the bootloader by purpose
if you flashed the rom recently don't judge the battery too early
give it 4-5 cyrcle charges until it settles down then see how it goes
Click to expand...
Click to collapse
Still you keep saying "after rooting" which is significantly different from unlocking the bootloader and flashing. Furthermore, to me it seems far more people report "better battery life" with their new roms.
About initially flashing the rom: i thought format of system, data and cache (including dalvik cache) ought to be enough. It has had somewhere between the 10 and 20 charge cycles by now. Battery life improved a little, but it's still far from acceptable. The battery percentage between reboots should only differ marginally between reboots (might need a few minutes of usage to become accurate). Also notable: over 20% difference in percentage reading between rom and recovery.
I wouldn't mind investigating this. So I wonder if anyone with "proper" battery life could provide me a "dumpsys" for the battery service and would perhaps have the time to take a look at /proc with me.

emrvb said:
Still you keep saying "after rooting" which is significantly different from unlocking the bootloader and flashing. Furthermore, to me it seems far more people report "better battery life" with their new roms.
About initially flashing the rom: i thought format of system, data and cache (including dalvik cache) ought to be enough. It has had somewhere between the 10 and 20 charge cycles by now. Battery life improved a little, but it's still far from acceptable. The battery percentage between reboots should only differ marginally between reboots (might need a few minutes of usage to become accurate). Also notable: over 20% difference in percentage reading between rom and recovery.
I wouldn't mind investigating this. So I wonder if anyone with "proper" battery life could provide me a "dumpsys" for the battery service and would perhaps have the time to take a look at /proc with me.
Click to expand...
Click to collapse
i unlocked the bootloader and root the device at the same period and i stayed for months with the stock rom
i don't know which one is responsible for percentage misreadings
also don't get confused
i am talking only for percentage misreadings and not for better battery life
and only when you charge the device.not unplugged
of course i had(and i still have) very good battery life with whatever rom i have flashed
by the way i have noticed the percentage difference between recovery and rom but i don't remember if it was 20%

rzr86 said:
i unlocked the bootloader and root the device at the same period and i stayed for months with the stock rom
i don't know which one is responsible for percentage misreadings
also don't get confused
i am talking only for percentage misreadings and not for better battery life
and only when you charge the device.not unplugged
of course i had(and i still have) very good battery life with whatever rom i have flashed
by the way i have noticed the percentage difference between recovery and rom but i don't remember if it was 20%
Click to expand...
Click to collapse
Alright, thanks for clearing that up. I really want to solve this issue, so I'm quite keen on getting the facts straight.
Back to my issue then (yeah I'm effectively hijacking this thread): is it possible the percentage misreading is causing the battery not to fully charge and/or discharge? Or should I direct my search to another cause?
This is what I found (or did not find) so far:
- Stand-by time seems great, the drain occurs when the screen is on.
- There is nothing in the normal battery usage (usage goes to screen)
- I was unable to detect an obvious culprit with better battery stats.
- I did notice that when I do a dumpsys, service battery shows voltage in V, while my Sony shows it in mV.
- I tried offline charging for about an hour today (light still orange), after boot the battery indicator showed 100%. It dropped to 86% in 7 to 8 minutes.

emrvb said:
I tried offline charging for about an hour today (light still orange), after boot the battery indicator showed 100%. It dropped to 86% in 7 to 8 minutes.
Click to expand...
Click to collapse
probably never truly reached the full charge(100%) when charged it in that one hour
by the way how old is your battery?
did you try with a new one?

rzr86 said:
since you are completely stock then the only thing i can tell you is to check your battery if it fits correctly
also how old is it?
Click to expand...
Click to collapse
please see attached screenshots
what do u think , is this battery or some hardware etc fault??

[Completed] Massive battery drain for Samsung S3 - tried most solutions on the web

Dear XDA experts,
It seems I have a typical problem for most Samsung Galaxy S3 I9300 users. I've been testing my phone's battery capacity on two different batteries, and four custom roms, yet something leeches out their power incredibly fast.
I've been deeply investigating the issue across the web, with no prevalent solutions that worked. Below I will describe exactly what my problem is, my specs, and what I've done to this point.
This will be my first post. I'm only doing this because I want to bring BetterBatteryStats data into consideration, without just speculating "do this". Please have mercy on my soul - I really appreciate all the stuff on the forum, and I wouldn't like to violate any rules.
Problem
My Samsung Galaxy S3 I9300 drains my batteries as a vampire, regardless of what I've tried. Just to give you an example: the phone loses 6% out of a 100% in just 40 minutes of standby, while being optimized, with no "lost signal" search processes. Without charging it twice a day, the S3 remains mostly unusable.
Purchase and Specs
I'm its second owner. The previous one sold it to me through an auction site (he was changing to S4). The phone seems legit. Mint conditions, little or no scratches visible. The system was factory wiped, and later it turned out that it wasn't flashed before. I also got original Polish carrier boxing with instructions, and equipment.
Note: The guy didn't handle the receipt to me, and I don't know if there's still warranty on the phone. Servicing might not be an option.
System:
[Cannot upload - all files in a MediaFire folder. Please look over there. Just add the missing characters]
www (dot)mediafire(dot)com(slash)folder(slash)wfb1spe9ez9al(slash)xda_S3_thread
SentinelROM 6.00
3.0.64-CM-gfab9e4c Kernel
Android 4.4.2
Factory battery EB-L1G6LLU 2100 mAh
Second battery M-Life ML0373 2300 mAh 8.5Wh 3.7v Li-ion
Normally, Bluelight Filter and GoLauncher EX Prime are the minimum that I have in the background.
What I've already done
Rooted my S3 with CM Autoroot
Installed CWM Recovery 6.0.4.6
Always did a factory, cache, and dalvik wipe
Tested CM11 NIghtly from 09.12.14
Tested CM10.2 Stable
Finally flashed SentinelROM 6.00 4.4 KK
Debloated my phone - not syncing, no tracking
Disabled "All, that's Google" #notonmywatch
With every new ROM, I've been optimizing settings and tweaking the CPU to ONDEMAND. Also, same time I've been running Go Power Master and Greenify. That covers nearly everything people were recommending in the many threads I've visited.
Weird facts
Phone can lose 6% in 40 minutes after charge while idle
Writing an sms can take as much as 10% of the battery
It seems odd that the S3 can fully charge in just 1h on both batteries
When trying to discharge my phone, it deadlocks below 4%, lasting unusual 2.5h when used
Screens
I've been monitoring my phone for a day with BetterBatteryStats while I had Greenify hybernate some apps. Obviously, I've seen an improvement in the performance, but it just seems not right. There's a lot of pics here, but I hope that someone can spot a tracing app, or some other spying tactics, because I just can't explain what's on.
[Cannot upload - all files in a MediaFire folder. Please look over there. Just add the missing characters]
www (dot)mediafire(dot)com(slash)folder(slash)wfb1spe9ez9al(slash)xda_S3_thread
That's all I have for now. I think it would be a great favor to everybody on XDA to finally crack the case. I'm open to suggestions, and I can run tests on the S3 and provide results here.
Last question
Could someone recommend the best ROM and kernel for energy optimization?
Thank you, and good luck.
PS: Imagine playing Watchdogs with Aiden having an advanced S3 phone... Wouldn't happen

Your symptoms sound like bad batteries honestly. The biggest giveaway here is that the battery drains ridiculously fast to 4% then lasts the "normal" amount of time. This is usually indicative of dead cells.
My suggestion, buy another battery, avoid the cheap aftermarket batteries, either go stock or a good quality 3rd party battery and see if it changes anything.
How long between flashes are you allowing your device to settle? Battery drain may appear high on fresh flashes for the first few cycles, this could also contribute to what you're seeing.

conmc
Stryke_the_Orc said:
Your symptoms sound like bad batteries honestly. The biggest giveaway here is that the battery drains ridiculously fast to 4% then lasts the "normal" amount of time. This is usually indicative of dead cells.
My suggestion, buy another battery, avoid the cheap aftermarket batteries, either go stock or a good quality 3rd party battery and see if it changes anything.
How long between flashes are you allowing your device to settle? Battery drain may appear high on fresh flashes for the first few cycles, this could also contribute to what you're seeing.
Click to expand...
Click to collapse
Hello Stryke,
Did you had a chance to look through the screenshots? I might buy a legit Samsung battery, but just something tells me that could not work. I've already seen posts from people saying they tried replacing the battery with another original, but without luck.
I must admit that I didn't consider the time in between flashes as important (never heard about it previously). Normally, I would just copy my zips to SD, reboot to recovery, do a wipe and then flash.
Please tell me - what do you think about the charge time? Is 1 hour enough for a full charge?
I welcome any other suggestions!

zulugulu said:
Hello Stryke,
Did you had a chance to look through the screenshots? I might buy a legit Samsung battery, but just something tells me that could not work. I've already seen posts from people saying they tried replacing the battery with another original, but without luck.
I must admit that I didn't consider the time in between flashes as important (never heard about it previously). Normally, I would just copy my zips to SD, reboot to recovery, do a wipe and then flash.
Please tell me - what do you think about the charge time? Is 1 hour enough for a full charge?
I welcome any other suggestions!
Click to expand...
Click to collapse
Generally no, even with fast charge my note takes longer than 1 hour to fully charge. I'd try the new battery, that will at least rule out one possibility. Time between flashes can make a huge difference as well, especially if custom kernels are involved.

Google Pixel 1 battery troubles

Hello all, so the original battery on my Google pixel, almost 3 years old, went to complete hell. It turns off in about a minute once unplugged, despite 100% battery life. So I went and replaced it with two Amazon bought batteries. The first one (definitely not OEM) had the same issue but my pixel would at least last about 10 minutes of regular use, unplugged, before shutting down. So I thought it might be the battery but the second one has the exact same issue. The second one at least looked like OEM with the exterior but since it came from Amazon, it's not 100% certain.
The problem is that the phone charges very fast, like 100% in less than 15 minutes and then discharges 10-20% in just a few minutes. If I last below 70% that would be out of the ordinary.
Is it possible that it's not a battery issue but maybe a different issue? A friendly person on another forum suggested that my core or graphics IC is overheating, attempting to throttle down; and then just shutting down when it looses the battle. Which makes absolute sense since the phone mostly shuts down when I'm playing games on my phone and usually turns off just under 80%.
I also found out that a recent google play store version was found to be the culprit for the extensive battery loss for other folks. Could this also be reason?
Are there any tests I could do to further determine the actual cause?
Thank you.

Two ideas:
- Deactivate Play Store app in Settings -> Apps & Notifications -> All -> Play Store -> Deactivate
- To rule out a damaged third party app as a cause for the battery drain (which actually is quite unlikely in your case), you can reboot into safe mode. For that, long-press the power button and then long-press 'shut down', confirm with OK. At the reboot, all non-system apps are freezed. Then you can check if the battery behaves differently.
Did you try charging your phone for about two hours longer, even if it says it is already at 100%? Maybe just the battery percentage measurement system is somehow damaged.
But you already tried that I guess. So maybe somebody else got another tip for you.

do you try flashing stock image? maybe the battery cache is in trouble

Similar to OP, my Pixel XL had started to have some odd issues beginning almost a year ago. It got REALLY bad in just the last six weeks or so when it would shut down at relatively respectable battery percentages (something like 23% - 57%, randomly).
- Deactivate Play Store app in Settings -> Apps & Notifications -> All -> Play Store -> Deactivate
- To rule out a damaged third party app as a cause for the battery drain (which actually is quite unlikely in your case), you can reboot into safe mode. For that, long-press the power button and then long-press 'shut down', confirm with OK. At the reboot, all non-system apps are freezed. Then you can check if the battery behaves differently.
Click to expand...
Click to collapse
Thanks for these ideas, BenjyTec.
When I deactivated ("Disabled" in my settings), there was no change in behavior. In fact, I had forgot I did that until giving things about a week and had forgotten when the phone behaved the same way, LOL (I just now re-enabled it).
I also tried the Safe Mode (which I had not previously known about - thanks!), and the phone still died out pretty quickly from a "full" charge.
Did you try charging your phone for about two hours longer, even if it says it is already at 100%? Maybe just the battery percentage measurement system is somehow damaged.
Click to expand...
Click to collapse
I had also done this several times. The really odd thing is many times I will have it on the charger all night or for several hours, and when I take it off it is only at a very low percentage - from 1% to 16%. !!! Of course more often than not it does get to a higher percentage.
do you try flashing stock image? maybe the battery cache is in trouble
Click to expand...
Click to collapse
Thanks, gonzakennyn - I have not done a "stock" image, but have factory reset the phone, with no joy. This was actually one of the things I did months ago even before it got really bad, because I wondered if maybe the battery cache or something at the kernel level had deeper issues.
Hopefully the OP might have had better luck or found something...

All these complaints sound like power supply issues.
Use the phone while it's in the charger, and there's no overheating/throttling/shutdown, right?

toucan said:
Similar to OP, my Pixel XL had started to have some odd issues beginning almost a year ago. It got REALLY bad in just the last six weeks or so when it would shut down at relatively respectable battery percentages (something like 23% - 57%, randomly).
Thanks for these ideas, BenjyTec.
When I deactivated ("Disabled" in my settings), there was no change in behavior. In fact, I had forgot I did that until giving things about a week and had forgotten when the phone behaved the same way, LOL (I just now re-enabled it).
I also tried the Safe Mode (which I had not previously known about - thanks!), and the phone still died out pretty quickly from a "full" charge.
I had also done this several times. The really odd thing is many times I will have it on the charger all night or for several hours, and when I take it off it is only at a very low percentage - from 1% to 16%. !!! Of course more often than not it does get to a higher percentage.
Thanks, gonzakennyn - I have not done a "stock" image, but have factory reset the phone, with no joy. This was actually one of the things I did months ago even before it got really bad, because I wondered if maybe the battery cache or something at the kernel level had deeper issues.
Hopefully the OP might have had better luck or found something...
Click to expand...
Click to collapse
Unfortunately, I did not find a solution. After replacing the battery twice I pretty much resigned to my fate. I'm going to hold out until Pixel 4 comes out.
Once fully charged, I could use my phone for browsing or watching videos for about an hour before I get to around 30-40%. Then I could leave it unplugged all night and wake up to my battery at 1%. It actually stays that way for a bit.
However, if I use my phone to play any games, I could only use it unplugged for about 10 minutes. My phone will power down without fail at 80% or below only when I play games. Weird thing is, whenever I power it back up, my phone will be 1% but despite that it could last quite a while.
As post-mortem mentioned, I could use my phone while charging without issues so maybe it is a power supply issue, in which case, I have no idea what I could do.

When it's not plugged in to a charger, the only power supply is the battery. Hence, I feel that even your "new" battery is not new.

So a little update all. I updated my phone to the latest Android 10 patch and the battery life has gotten significantly better. It's still not enough to last all day but it can last probably 6-8 hours with minimal use. If I use it constantly, it might last two hours.
I am no longer tethered to my charger when playing games, which is really good news and all the prior issues with the phone shutting down ~80% is gone.
Perhaps the previous Android patches contained faulty code?

I would do fresh install and see if problem resolves. Fresh install fixes all sorts of software issues.

So my battery woes aren't as bad as yours but I did get to the point where I had the battery replaced. I went to uBreakiFix and I have no idea what battery they put in but the bottom line is a brand new battery didn't help much. I got a little better battery life but not as much as I had hoped. I'm assuming that it's either due to the apps I have installed and my usage or the phone is getting old and something is drawing a little more power than it used to. I have not gone to the trouble of factory resetting to see if that would help yet.

JoeHockey said:
So my battery woes aren't as bad as yours but I did get to the point where I had the battery replaced. I went to uBreakiFix and I have no idea what battery they put in but the bottom line is a brand new battery didn't help much. I got a little better battery life but not as much as I had hoped. I'm assuming that it's either due to the apps I have installed and my usage or the phone is getting old and something is drawing a little more power than it used to. I have not gone to the trouble of factory resetting to see if that would help yet.
Click to expand...
Click to collapse
Factory resets didn't help my old issue. Updating to the latest Android os helped immensely. As stated above I no longer have the initial issues. I estimate I now have about 70-80% capacity, which is not bad at all considering I bought my battery through Amazon for around $20.
I thought if you got your battery replaced at ubreakifix, then they are obligated to fix your issue or refund you your money.