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Hey Everyone,
I apologize if this is a repost. I know I read somewhere (I believe here) about a similar issue, but I couldn't find it in searching.
A little background - AT&T SGS2 running stock rom (2.3.4), rooted, using a custom kernel (2.6.35.6) I got off of here.
Anyway, my phone has been working great for months. All of a sudden, my battery indicator is completely wacky and innacurate. It seems to have started after I came back from a trip and had to put it in 'airplane mode' a few times.
The battery level indicator goes down very quickly, and is not a true indication of my phone's charge level. I noticed it a couple days ago (after we came back) where after about 6 hours, I was down to 40%. Normally after a full day's usage I am still at ~80% by the time I get home from work. Since my phone had been running for weeks without a reboot, I decided to reboot it, thinking maybe I had some overzealous background processes running. It came back online with the battery indicator at 8% (down from 40% a minute prior)! After about 30mins or so, it began to go up, and settled around 14%. It stayed at this level for hours, until I plugged it in when I went to bed.
The next morning, same thing, it would lose 1-2% every few minutes until it got down to <10%, where I would get a warning about a low battery level. But once it hit that mark, it would stay there for hours and my phone would work perfectly fine.
As I mentioend above, I thought I read a similar story where the recommendation was to turn the phone off, charge it up all the way, and then turn it back on after it was fully charged. I tried that last night, but my phone is down to 87% after only 2 hours of non-use.
I've made sure that UV/OC'ing was disabled, that no background apps are doing anything weird, etc. And it's not like my battery is really dying quickly - it's just that Android thinks it is. I've checked the level using multiple programs, and all report the same incorrect information.
Does anyone have any suggestions on how to fix it? Thanks!
You have encountered two separate issues, one of which is widely documented (fuel gauge reaction to rebooting), one of which is unexpected but possible on UCKH7 (abnormal drain).
But it doesn't look like the battery is really draining that much quicker, only that it's showing that it is. For example, while it might take me only 3 hours to go from 100%-10%, I'll stay at 10% for hours.
It's like the battery is no longer calibrated properly.
Do you use Samsung original charger? If not, try. It should go away.
Take your battery out for a few minutes. The SG2 differs in that it uses a chip for battery calibration/stats. You need to cut power to it completely to reset it. Now, if it still does it afterward, either the battery is faulty, or the phone's ability to measure voltages is wonky.
Also, are you using the phone's Power Saving mode? Maybe the battery is dying but the phone is taking steps to make it last longer?
---------- Post added at 10:23 AM ---------- Previous post was at 10:18 AM ----------
CyberGhos said:
Do you use Samsung original charger? If not, try. It should go away.
Click to expand...
Click to collapse
I used to never use my Samsung charger and never had issues. However, months of using my blackberry charger has rendered it now ineffective. The charger dongle was slightly smaller, and its continuous wiggling messed up my phone's power port slightly. It's a good thing that my Samsung charger still works.
When we were on vacation, I was using my wife's charger for her phone (T-Mobile G2x) so we didn't need to take two (seemingly) identical chargers with us. My understanding was that the pinout and voltage were all the same, so I didn't think it would matter. Maybe that had an impact?
Normally I use my Samsung charger, and have been since we got back.
I haven't tried removing the battery yet, since its in a hard shell case and was hoping I could resolve the issue without taking it apart. But I'll try that tonight.
Power saving mode is disabled. I've also disabled BT, Wi-Fi, GPS, and shut down every app. In the time since my first post (84%) and now, I'm down to 58%, and my phone has been sitting on my desk unused the entire time.
According to the built in battery monitor, Android OS accounts for 92% of battery usage, with Display at 3%, Cell Standby at 3% and Phone Idle at 2%.
As I mentioned above, I thought I read something about a 'trick' to reset the battery gauge by turning the phone off, charging it to 100%, unplugging it, and then turning it back on. Was I mistaken?
Thanks for the responses.
FYI - I just pulled the battery, let it sit for a minute, and plugged it back in.
Battery level went from 58% to 39% after it powered back on.
I'll try charging it again to see if it has any noticeable impact.
Oh, I did want to mention that I've been very religious when it comes to charging my phone properly and trying to "take care" of the battery. I never let it get below 20% (outside of recently due to the issue), I always charge it up to 100%, I never do quick "let me just charge it for 15 minutes to make a call" type charges, I always use a wall charger and not a car charger, etc.
Down to 38% during the time it took me to type this...
phonic said:
When we were on vacation, I was using my wife's charger for her phone (T-Mobile G2x) so we didn't need to take two (seemingly) identical chargers with us. My understanding was that the pinout and voltage were all the same, so I didn't think it would matter. Maybe that had an impact?
Normally I use my Samsung charger, and have been since we got back.
I haven't tried removing the battery yet, since its in a hard shell case and was hoping I could resolve the issue without taking it apart. But I'll try that tonight.
Power saving mode is disabled. I've also disabled BT, Wi-Fi, GPS, and shut down every app. In the time since my first post (84%) and now, I'm down to 58%, and my phone has been sitting on my desk unused the entire time.
According to the built in battery monitor, Android OS accounts for 92% of battery usage, with Display at 3%, Cell Standby at 3% and Phone Idle at 2%.
As I mentioned above, I thought I read something about a 'trick' to reset the battery gauge by turning the phone off, charging it to 100%, unplugging it, and then turning it back on. Was I mistaken?
Thanks for the responses.
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Click to collapse
That to me sounds like you might have an app creating a wakelock and preventing it from going into deep sleep.
phonic said:
But it doesn't look like the battery is really draining that much quicker, only that it's showing that it is. For example, while it might take me only 3 hours to go from 100%-10%, I'll stay at 10% for hours.
It's like the battery is no longer calibrated properly.
Click to expand...
Click to collapse
With the exception of high load immediately following a reset (which is why it goes funky on a low-battery reboot), it's basically impossible for the fuel gauge to go out of calibration. It's designed to continuously converge towards truth.
Check the raw battery voltage when it seems to be funny. If your voltage is consistently low, you might be experiencing a hardware failure (like maybe the battery's protection circuit is on its way out.)
After pulling the battery, putting it back in and recharging it, it seems to be working well now. Too early to say for sure, but I went the entire afternoon and evening (up until now) with some mild usage, and am only at 84%. So far so good!
phonic said:
FYI - I just pulled the battery, let it sit for a minute, and plugged it back in.
Battery level went from 58% to 39% after it powered back on.
I'll try charging it again to see if it has any noticeable impact.
Oh, I did want to mention that I've been very religious when it comes to charging my phone properly and trying to "take care" of the battery. I never let it get below 20% (outside of recently due to the issue), I always charge it up to 100%, I never do quick "let me just charge it for 15 minutes to make a call" type charges, I always use a wall charger and not a car charger, etc.
Down to 38% during the time it took me to type this...
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Click to collapse
The phone has a voltage drop which causes the drop from 58 to 39 when you reboot it. I'm not a fan of it either.
Hi, I'm coming from an SM-930F and now have a SM-965F. I'm experiencing a strange charging behavior. I became aware of this when noticing that the S9 plus when connected to my Aukey QC 3.0 charger in my car via the OEM cable (screen on and GPS active) can only hold, but not increase the battery level. This was completely different with my S7 (same charger) which achieved an increase in battery level of 30% per hour, all other things equal. I now did some tests with a plug power meter and found that the charging current goes down immediately when the screen is switched on by roughly 75%. The charging power decreases from 6-7 W to 1.5 W. Please note that this is the gross current/power flowing from the wall socket to the device. With the energy consumption of the display, the net current flowing into the battery is negligible which explains the observation above. Interestingly, the effect is also present with the Qi charger, but to a much lesser extent (only 20% reduction of charging current with screen on). The S7 does not behave this way.
Has anybody observed similar effects or could check with his/her own device? Is this an intended behavior? Does this mean that - effectively - the S9 plus cannot be used while charging?
Best regards
Christoph
I have a USB multimeter and have checked several phones of mine.
This behavior is inherent to Qualcomm Quick Charge. I came to the S9+ from a Droid Turbo 2, both exhibited the same behavior.
Also i've never seen voltage spike above 9V, even though it's supposed to go up to (in theory) 12v (QC2.0)
Samsung support told me that this was not normal. I sent the device to them now. We'll see whether this will make a difference.
machristoph said:
Samsung support told me that this was not normal. I sent the device to them now. We'll see whether this will make a difference.
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1.5W is waayy too low for modern smartphone, I'm averaging about 5W with the regular "cable charging" status.
I'm having issues trying to trigger the fast charging mode on my S9+ with the variety of QC2/3 capable chargers that I have laying around. Just bought a voltmeter to do more testing to see what's going on with these chargers.
I don't even get consistent result using Samsung's charger and cable, so I'm wondering if my port is jacked.
Samsung phones don't fast charge when the screen is on, but it shouldn't drop as much as you're seeing. It should work pretty much as the S7 did.
Hi folks,
I still have an issue with the charging behavior of my S9+ and, as time has gone by and I have collected some more information, I am seeking your advice again.
My problem is that cable chargin while screen is on is more or less impossible.
This is not about fast charging not working. I am aware that fast charging is not fully operational while screen is on.
But 9 out of 10 times my phone does not charge at all while screen is on when connected by cable.
However:
- Charging on QI charger with screen on is working.
- Cable charging with screen off (even with always on display switched on) is working normally (not superfast, but roughly 30% per hour which is ok for me)
- Even with screen on, status bar notification says that fast charging is active and gives "normal" estimated charging times. But the battery level won't increase over time (or only with very low rates).
I already tried various chargers and cables without any effect.
I resetted the phone for several times. I verified that the behavior described above also occurs with a plain phone without any Google or Samsung account or any other apps than stock installed.
Brightness of screen does not really matter (with lowest level you might get very slow (1% per hour) increase in battery life, with highest level it is closer to -1%/h).
I even sent it to the support where they told me they could verify and fix the problem --> without any effect.
I changed the phone. Unfortunately, the new one first seemed to work flawlessly, but showed the same behavior after some cycles.
Interestingly, sometimes (1 out of 10) cable charging with screen on is working at least somehow. Some days ago, I could increase batterery level by roughly 10% within one hour. But I could not repeat that.
I attach screenshots of GSam Battery Monitor which show that charging rate goes down as soon as display is switched on.
Do you have any ideas? How is your phones charging behavior while screen is on?
Best regards,
Christoph
I'm just speculating on this but I always was under the assumption it turns down the charging rate due to heat, having the screen on, GPS going, etc heats the phone. The newer models seem to be more sensitive to it and throttle back faster.
My dock sits on up on the windshield and it doesn't take much when it's sunny out for the phone to stop charging all together, it overheats when running GPS, screen on and the sun is hitting it. I need to find a new mount to move it lower down on the dash...
Thanks for your reply. I also suspected that temperature could play a role here. But I have not been able to verify that yet. Attached you'll find also battery temperature for the charging cycle shown in my previous post. I also let sit my phone in the fridge for a couple of hours before charging without any significant effect.
On the other hand, I find charging rate to be lower on hot, sunny days. Today, with cloudy sky, I could increase battery level by 4% during my 30 minutes commuting time. Thus, if there is a relationship with battery temperature, it's not a simple linear one...
I had to move my phone mount recently because of some changes I made to my car, previously it sat in front of the AC vent and I didn't have issues, now it's not and that sucker overheats and stops charging in no time when it's sunny out. If you can position it where a vent is blowing cold air on it, it should help.
Unfortunately it's already sitting there...
Hi,
I have a charger with a qualcomm QC 3.0 port and other regular 9V 2A ports, so I have the same problem when my phone is connected to QC port, but for some reason it's charging normally when connected to the regular ports.
My phone is the european exynos version.
Interesting, mine is the exynos version, too. I'll try to test a regular port, too.
And also good to know, that I'm not the only one with similar problems...
On rooted phones there are a way to make charging stop at 80% charge level. I would like to do this as I charge my phone overnight at a wireless docking. For my use this battery lasts me 2 days of use so stopping it at 80% won't be a problem. I also have a wireless charge at my work desk so I can just place it there at work also. I don't like to keep topping it up to 100% through the day and it would be awesome to just not have to worry about it and have a limit at 80% so I could leave it on the wireless charge pads whenever I'm close to one. Anyone have a solution to this? I have accubattery that can give me an alarm at 80% but that's just anyoing and won't work especially over night..
I use Accubattery to limit the charge to 80%...it does NOT stop charging, but at least it triggers an audible notification so I know when to disconnect. With fast charging not taking more than an hr, I'm usually around.
But it can't stop it from what I can tell so it won't solve my problem.
search xda for app called battery charge limit
this do what u need
im using it on my s9+
MaZaGnGy said:
search xda for app called battery charge limit
this do what u need
im using it on my s9+
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Click to collapse
Requires root
You can't do it without root but considering how quickly the Mate 20 Pro charges there is no legitimate reason to leave it charging overnight. That's a habit from the early days of cell phones that has been strongly discouraged for years. If you leave a Pixel phone plugged in overnight and anything happens as a result Google considers your warranty null and void due to owner abuse.
I'm not using the fast charge..
You could say that its a old habit but I feel its quite opposite. I have IKEA wireless pads integrated into the table at the side of my bed so I just rest my phone on it naturally not having to plug anything in. Same as I have on my desk at work and in a table in my living room. It doesn't require me to plug in anything and I can just rest my phone there it feels like 2018. Worrying about cables and proprietary speed charges that's what's old to me..
Compared with an electric car I Always prefer charging it slow at home overnight or when I'm not using it instead of sitting at the supercharger staring out the window wasting 30 minutes that I'll never get back doing nothing. It's not that hard on the battery and I'm not having to waste time doing it.
I just want to set a charge limit so I can use it between 30-80% without having to control it manually..
Any good at software? Maybe get a smart plug, and either write an app of use tasker to turn off the plug when you hit 80% if I had a smart plug i would do it for u
I had to reread the first post about using (I'm using GSam) to set an alarm, that's exactly what I do. Like others have said about fast charging I too prefer charging at a slower rate to reduce heat and try and extend life out of it (I just know the person I eventually sell it too will benefit from this, not me ).
I just program a notification to my honor band 3 from GSam and it vibrates when it's reached the percentage. I've given up on the routine of when I charge but generally just top up when it gets to 30% as usage varies. Charging to 100% when I need it a full day out away from home.
Can see why you would want to automatically stop it though and make use of them IKEA charging pads. ?
I've even thought about timing the charge of the fast charger from 30-80% then setting the smart plug on for that duration when eyes shut time. I'll here it click before I'm asleep of that I'm sure. #insomniac
Trouble is I can't always determine if it will be down to 30% by bed. Could do a chart showing number of minutes needed Vs percentage but that would probably be taking it a little too far ?
I have a TP LINK smart plug and the app has a timer on it to turn it off.
I have a multi port USB charging hub connected to this.
I simply turn the plug on, set the timer for an approximate amount of time using the app and go to sleep.
I waken up with around 80-90% battery every morning.
Takes me seconds at night, literally
When I bought this phone, the first 2 or 3 charges, at night, where optimized night Charging. I received a notification saying that.
But now I havn't received any notifications regarding night charge...
Is there a way to force that, or to delete an APP data, so that this feature Will reset and I can use the optimized night charge again?
Go into Settings > Battery > More settings for battery > Optimized Night Charging
(Settings names may vary as I use my phone in french so I don't have the "real" names in english.)
If the battery on mine is low SuperVOOC charging starts as soon as I plug it in but it does switch to optimised charging once it reaches a certain level. Don't ask me the ‰, I ain't got the time to sit and watch it charge.
I saw it happen last night. When the battery reached 80% it switched itself to Optimized Night Charging.
Got this device around a week ago and I'm finally daily driving it. I've noticed a big issue though... I can't charge the device past 80% when its turned on. It stops itself from charging it seems like. I have to turn off the phone completely, and plug it in when powered off to get it to 100%.
Is there a setting I have checked or something? maybe a Kernel Tweak I don't know about that could be causing this that I could change/reverse/modify?
Thanks!
KaptinBoxxi said:
Got this device around a week ago and I'm finally daily driving it. I've noticed a big issue though... I can't charge the device past 80% when its turned on. It stops itself from charging it seems like. I have to turn off the phone completely, and plug it in when powered off to get it to 100%.
Is there a setting I have checked or something? maybe a Kernel Tweak I don't know about that could be causing this that I could change/reverse/modify?
Thanks!
Click to expand...
Click to collapse
Turn off optimized charging.
ohhhhhhh. Epic. Thanks
It's not a good idea to charge with screen on especially in high temperatures or in direct sunlight. You can cause hardware damage like this... auto thermal shutdown may not engage fast enough to save the device.
In general charging while using skews the charging curve, increases charging time and battery stress. These phones have a fixed heat sinking capacity which cases and glass screen protectors further compromise.
Constant operation with battery levels near 100% will impact battery longevity noticably.
Keep watch for any signs of case bulging. It indicates battery swelling/failure. Replace it immediately if this happens. Other signs of a battery failure are a sharp drop in capacity, erratic fast charging or failure of fast charging to engage. A swollen battery can destroy the display.
The risk of a thermal runaway event increases exponentially with a failed or degraded Li.
Replace them when their capacity falls below 80% of new to avoid a failure.
blackhawk said:
It's not a good idea to charge with screen on especially in high temperatures or in direct sunlight. You can cause hardware damage like this... auto thermal shutdown may not engage fast enough to save the device.
In general charging while using skews the charging curve, increases charging time and battery stress. These phones have a fixed heat sinking capacity which cases and glass screen protectors further compromise.
Constant operation with battery levels near 100% will impact battery longevity noticably.
Keep watch for any signs of case bulging. It indicates battery swelling/failure. Replace it immediately if this happens. Other signs of a battery failure are a sharp drop in capacity, erratic fast charging or failure of fast charging to engage. A swollen battery can destroy the display.
The risk of a thermal runaway event increases exponentially with a failed or degraded Li.
Replace them when their capacity falls below 80% of new to avoid a failure.
Click to expand...
Click to collapse
99.9% of the time I'm charging, the screen is off and I'm watching tv before bed. I'll unplug at 100% and go to bed. I also won't plug in until I'm under 15%.
I work in cell phone whole sale and repairs, so one thing I understand well is taking care of a device.
But, disabling that setting recommended above, it still stops charging at 75% entirely and never goes to 100 unless I turn it off entirely
KaptinBoxxi said:
99.9% of the time I'm charging, the screen is off and I'm watching tv before bed. I'll unplug at 100% and go to bed. I also won't plug in until I'm under 15%.
I work in cell phone whole sale and repairs, so one thing I understand well is taking care of a device.
But, disabling that setting recommended above, it still stops charging at 75% entirely and never goes to 100 unless I turn it off entirely
Click to expand...
Click to collapse
If the screen is on it may not charge at all.
This is normal.
Cycling the battery like you do stresses it and will reduce its lifespan.
Li's like frequent mid range power cycling.
Not under 30% or over 80%
If it didn't use to behave like this the battery may have degraded. 1-2 years is a typical lifespan for a heavily used Li. Approximately 200 full charge cycles.
Replace when it degrades to less than 80% of its original capacity to avoid a failure.
This phone has only been out since January 2021, so its not a batter degrade issue. Plus, it was pulled brand new out of the box like this. You also didn't read what I said. I'm not using it while charging at all. Its sitting on a table next to me while I'm watching tv or gaming on my PC/Switch. I'll check it once in awhile to see battery percentage and it will stop at 75%, then discharge as if its not plugged in at all. I have to turn the phone OFF COMPLETELY to charge it to 100% once I get to 75%
I'm assuming software issue. when I had GSI roms on the phone, it worked fine.
KaptinBoxxi said:
This phone has only been out since January 2021, so its not a batter degrade issue. Plus, it was pulled brand new out of the box like this. You also didn't read what I said. I'm not using it while charging at all. Its sitting on a table next to me while I'm watching tv or gaming on my PC/Switch. I'll check it once in awhile to see battery percentage and it will stop at 75%, then discharge as if its not plugged in at all. I have to turn the phone OFF COMPLETELY to charge it to 100% once I get to 75%
I'm assuming software issue. when I had GSI roms on the phone, it worked fine.
Click to expand...
Click to collapse
Li batteries can fail at any time.
Symptoms; diminished battery capacity, erratic fast charging. Any signs of phone swelling, usually the rear cover is a battery failure in progress. Replace immediately.
If the phone is drawing more current than the charger and/or the power controller can supply, it will drain the battery.
It may be a software, firmware or hardware issue...
Check all settings, disable all power management. Enable fast charging (toggle on/off 3 times then leave on).
Clear system cache and do a hard reboot.
Return associated updated apps to their factory loads.
If you did any major firmware (OS) updates do a factory reset.
A defective/improper charger or cable; try known good Samsung charger/cable.
Defective C port PCB.
A failed mobo.
Time to send it in for service or replacement.
blackhawk said:
Li batteries can fail at any time.
Symptoms; diminished battery capacity, erratic fast charging. Any signs of phone swelling, usually the rear cover is a battery failure in progress. Replace immediately.
If the phone is drawing more current than the charger and/or the power controller can supply, it will drain the battery.
It may be a software, firmware or hardware issue...
Check all settings, disable all power management. Enable fast charging (toggle on/off 3 times then leave on).
Clear system cache and do a hard reboot.
Return associated updated apps to their factory loads.
If you did any major firmware (OS) updates do a factory reset.
A defective/improper charger or cable; try known good Samsung charger/cable.
Defective C port PCB.
A failed mobo.
Time to send it in for service or replacement.
Click to expand...
Click to collapse
It's a standard OnePlus feature at work.