battery sudden drop - OnePlus 2 Q&A, Help & Troubleshooting

guys I need help .
I recently lost my original charger and I have been using an lg charger since ( 1 week) the issue is that sometimes I get random reboots and when it turns back on battery level drops to 50 percent or even down to 30 percent. I am not sure if it's related to the charger ? or if it could be a software / rom issue ? do I have a bad battery?
I am using latest lineage os
https://drive.google.com/file/d/1hrxDLW-toT9VQewgf1bvFKGsMr7ILNwA/view?usp=drivesdk

I am guessing with the circle battery it is the nougat lineage you are on and not Oreo ?
I would use ampere from the playstore and see if you are getting a decent charge from the charger anything about 1000 in ampere is good enough imo to say cable and charger are good.
I would then use one of the battery killer apps which runs your battery flat as quick as possible to see if it discharges smoothly or jumps all of a sudden from 80% to 30% for example.
If it does all look good i would say clean wipe and try another ROM to see if it is just software.
If it is all bad news then I would still clean wipe and try another ROM just in case.
If it is bad on both ROMs it is likely the battery.

Related

[Q] Battery is charging very slowly, but there's no battery drain

Last week I've installed a new usb port for my S4, because the old one broke. I know you will most likely think I've connected it poorly or whatever, but I don't think so, because I've had the slow charging issue before that.
I've got a couple of chargers. A Xiaomi 10.400 mAh charger, the original samsung AC charger, my nexus 7 charger, a Chromecast charger and a generic one from some store. The Xiaomi charger used to charge my phone quite fast. While playing Clash of Clans, on middle-high brightness I would still get about 1% every 2 minutes or so. Same with the nexus 7 one.
Right now however, it's struggling to get charged. It seems like the battery is draining faster than it's charging. But I've recently rooted my phone and installed the 5.0 GPE version rom, and my battery life has never been better. Recently got to 12h with about 2-3h SOT and still 60% left, which made me really happy. But if I charge it and use it, I only get about 1% every 10-15 minutes. Which kinda sucks.. (Right now, my s4 is on 87% and according to the lockscreen prediction thingy, it takes 1h06min to get to 100, while not using the phone)
Has anyone seen this problem before or knows how to fix it?
Do you charge it at your PC/Laptop?
My phone also charged very slowly when connected to the PC.. This was on original firmware.
Now I'm using GPE ROM but I haven't charged it at a PC yet.
There are some options in the Googy Max settings regarding charging.
What if it's the battery?
GDReaper said:
Do you charge it at your PC/Laptop?
My phone also charged very slowly when connected to the PC.. This was on original firmware.
Now I'm using GPE ROM but I haven't charged it at a PC yet.
There are some options in the Googy Max settings regarding charging.
What if it's the battery?
Click to expand...
Click to collapse
Nope, I charge it using a wallplug.
I must say it seems like my Xiaomi battery is charging my phone faster today. This afternoon it did about 30% an hour or something.
Edit: What it seems to be doing is charge fast at lower % battery, and charge slow on higher %. Is this a setting of something, perhaps?
NickS4 said:
Nope, I charge it using a wallplug.
I must say it seems like my Xiaomi battery is charging my phone faster today. This afternoon it did about 30% an hour or something.
Edit: What it seems to be doing is charge fast at lower % battery, and charge slow on higher %. Is this a setting of something, perhaps?
Click to expand...
Click to collapse
I have an app called battery doctor which has 3 charging stages. From X% to 80% theres a fast charge, then from 80% to 100% it (supposedly) reduces the current to ensure a full charge (basically it charges slower from 80 to 100%). I don't know what difference there is in charging time in those 2 stages. But you say it happens on different roms so either you have recently installed an app like battery doctor or it's something else.
Have you tried charging the phone while it's turned off to see if it charges faster or same as before?
GDReaper said:
I have an app called battery doctor which has 3 charging stages. From X% to 80% theres a fast charge, then from 80% to 100% it (supposedly) reduces the current to ensure a full charge (basically it charges slower from 80 to 100%). I don't know what difference there is in charging time in those 2 stages. But you say it happens on different roms so either you have recently installed an app like battery doctor or it's something else.
Have you tried charging the phone while it's turned off to see if it charges faster or same as before?
Click to expand...
Click to collapse
The only apps with root acces I have are system tuner, titanium backup and adaway. I uninstalled System Tuner, will see if that helps. And the only other thing that could do it is Googy-Max Stweaks.
I just turned the setting Charge Control Switch from disabled to Substitute AC to USB and got 7 % in 14 min. I feel it's quite a bit faster now. Gonna check it out while having Clash of Clans running. If it's still charging at 1% every 5 minutes, ill be happy
Just tested it for a bit, and went from 45 to 60% in 22 minutes. So I'm happy again

new battery dead?

Guys I need some help pls.
I ordered new battery, yesterday I opened phone carefully and replaced old battery, all went smooth.
But when try to switch on phone doesnt start. When connecting to psu it starts normally, battery shows 100% and not charging. If remove cable phone turns off instantly.
I wiped cache, dalvik, batterystats, no luck. Tried different psu, the same
I put old battery back and phone turns on and works ok, same as before.
Is possible that new battery coud be completely dead?
The new battery printed manufactured date is older than my current battery. 06-2015 vs 12-2015.
Is there anything else I should try , beside rma?
Thank you
csjneek said:
Guys I need some help pls.
I ordered new battery, yesterday I opened phone carefully and replaced old battery, all went smooth.
But when try to switch on phone doesnt start. When connecting to psu it starts normally, battery shows 100% and not charging. If remove cable phone turns off instantly.
I wiped cache, dalvik, batterystats, no luck. Tried different psu, the same
I put old battery back and phone turns on and works ok, same as before.
Is possible that new battery coud be completely dead?
The new battery printed manufactured date is older than my current battery. 06-2014 vs 12-2014.
Is there anything else I should try , beside rma?
Thank you
Click to expand...
Click to collapse
Yes, there's a battery thread, where good replacements are linked. A 3 year old battery isn't a good replacement. Give it back to the seller. And did you try to put your "new battery" a second time in your phone, may you just didn't connect the cable correctly at first try. ???
coremania said:
Yes, there's a battery thread, where good replacements are linked. A 3 year old battery isn't a good replacement. Give it back to the seller. And did you try to put your "new battery" a second time in your phone, may you just didn't connect the cable correctly at first try. ???
Click to expand...
Click to collapse
Thanks for reply,
Yes I did with case open swapped old and new one multiple times to be sure, old one turns on and charging, new one don't.
csjneek said:
Thanks for reply,
Yes I did with case open swapped old and new one multiple times to be sure, old one turns on and charging, new one don't.
Click to expand...
Click to collapse
Then buy a better replacement, may not a 3 year
old one
Do search for " Cameron sino" for nexus 6p on either eBay or Amazon and buy that battery. I got mine for 25.00 . My phone charges to 100%, discharges slowly and doesn't shut off anymore at less than 20% battery like it did before. Accubattery app on playstore shows my battery health at 97% now ,the stock one was at 67% health. It does take a couple of full charges and full discharges to manage that health readout. Cameron sino seems to be the best one I've had so far. Just make sure you charge it to 100 and use it till it shuts off the first few times and profit. Trains the battery to fully charge and discharge . People make the mistake of charging when it isn't dead and that slowly suck the life out of your new batteries.
wmills said:
Just make sure you charge it to 100 and use it till it shuts off the first few times and profit. Trains the battery to fully charge and discharge . People make the mistake of charging when it isn't dead and that slowly suck the life out of your new batteries.
Click to expand...
Click to collapse
This might be true for nickel cadmium and nickel-metal hydride batteries , but it doesn't apply to lithium ion batteries. If anything, it's better to charge the battery when it still has ~20% left and stop charging around 80%. Lithium ion batteries don't like being too discharged or too charged as it causes them to wear out faster.
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
https://lifehacker.com/smartphone-battery-myths-explained-1735327089
https://www.cnet.com/how-to/true-or-false-battery-myths-that-need-to-die/
http://www.androidauthority.com/battery-myths-688089/
Whoa great been doing all wrong ,you are a wealth of knowledge
wmills said:
Whoa great been doing all wrong ,you are a wealth of knowledge
Click to expand...
Click to collapse
After quickly destroying the battery in my Galaxy Nexus I decided to research ways to prolong the life of the battery in my smartphone, especially since the phone I replaced it with (Nexus 6) didn't have a removable battery. So far they've worked great. Several tips I have are:
1. Plug in when you get to ~20-25%. If you want to be super extreme you can use an app like Battery Charge Limit to stop charging at 80%. Like I said earlier, discharging/charging too far is bad for the battery.
2. Don't use fast charging. This heats up the battery and wears it out faster. I've used the 1 amp charger from my Galaxy Nexus on my Nexus 6 and 6P and it has definitely helped prolong the life of the battery.
3. Don't use the phone while charging. This causes it to heat up and wears out the battery faster. Light things like texting or browsing XDA with their app won't heat it up too much, but gaming or installing ROMs while plugged in is very bad.
4. Don't charge the phone overnight while it's on. Obviously after the phone reaches full capacity it stops charging, but if your phone is on and running stuff in the background the battery will drain. When it drops to 98% it starts to trickle charge again until it reaches full capacity. This cycle of charging and draining will occur several times throughout the night and adds unnecessary wear cycles to the battery. It's best to charge while the phone is off to avoid this cycle.
5. Don't let the battery get too hot or too cold. Low temperatures can be just as harmful to batteries as high temperatures. If it's 100°F or 0°F outside and your battery is getting very hot or very cold it's best to just leave the phone in your pocket until you're in a place with a more reasonable temperature, such as inside a building or something. Lithium ion batteries prefer a happy medium, which is usually around room temperature (~68°F).
6. Keep the phone cool while doing CPU intensive tasks that cause it to heat up. When I install a ROM and boot it for the first time, wipe cache/dalvik after installing something, run the auto patcher in WakeBlock, or anything else that causes the CPU to run at a high frequency for prolonged periods of time I remove my phone from its case and place it in front of a fan on high speed. This keeps it from getting too hot, but doesn't let it get too cold. Placing your phone in the fridge/freezer will also keep it cool, but lets the battery get too cold, so that method is not recommend.
7. I use an app like EX Kernel Manager to display the battery/CPU temperatures in the notification area. If I notice the temperatures are getting too high or too low I stop using the phone until it cools down or I'm somewhere warmer. This can be annoying on Oreo because you get notifications of apps running in the background, but that's pretty easy to block
Keeping the phone cool can also help avoid the defect in the Snapdragon 810 that causes the BLOD (boot loop of death), which usually occurs when the solder holding the processor to the mother board develops cracks.
Based on posts I've seen in this forum most people begin to experience battery or boot loop issues after about a year or so. I've had my 6P for about a year and have not had any battery, heat, or boot loop issues. In my experience, taking care of your phone and being "extra nice" to it is the key to prolonging its life. After 2 years of using my Nexus 6, battery life on the day I sold it was just as good as day I unboxed it. I don't want to jinx myself, but the same goes for my 6P. After almost a year of use I can still go 16+ hours off the charger with 4+ hours of SOT and 30% or more left in the battery when I plug it in at night.
I'm gonna try this
Face_Plant said:
After quickly destroying the battery in my Galaxy Nexus I decided to research ways to prolong the life of the battery in my smartphone, especially since the phone I replaced it with (Nexus 6) didn't have a removable battery. So far they've worked great. Several you're l tips I have are:
1. Plug in when you get to ~20-25%. If you want to be super extreme you can use an app like Battery Charge Limit to stop charging at 80%. Like I said earlier, discharging/charging too far is bad for the battery.
2. Don't use fast charging. This heats up the battery and wears it out faster. I've used the 1 amp charger from my Galaxy Nexus on my Nexus 6 and 6P and it has definitely helped prolong the life of the battery.
3. Don't use the phone while charging. This causes it to heat up and wears out the battery faster. Light things like texting or browsing XDA with their app won't heat it up too much, but gaming or installing ROMs while plugged in is very bad.
4. Don't charge the phone overnight while it's on. Obviously after the phone reaches full capacity it stops charging. If your phone is on and running stuff in the background, the battery will drain a little. When it drops to 98% it starts to trickle charge again until it reaches full capacity. This cycle of charging, draining, and recharging will occur several times throughout the night and adds unnecessary wear cycles to the battery. It's best to charge while the phone is off to avoid this cycle.
5. Don't let the battery get too hot or too cold. If it's 100°F or 0°F outside and your battery is getting very hot or very cold it's best to just leave the phone in your pocket until you're in a place with a more reasonable temperature, such as inside a building or something
6. Keep the phone cool while doing CPU intensive tasks that cause it to heat up. When I install a ROM and boot it for the first time, wipe cache/dalvik after installing something, run the auto patcher in WakeBlock, or anything else that causes the CPU to run at a high frequency for prolonged periods of time I remove my phone from its case and place it in front of a fan on high speed. This keeps it cool, but not too cold, and doesn't allow it to get too hot. Don't place it in the fridge/freezer. Doing that will cause the battery to become too cold.
7. I use an app like EX Kernel Manager to display the battery/CPU temperatures in the notification area. If I notice the temperatures are getting too high or too low I stop using the phone until it cools down or I'm somewhere warmer. This can be annoying on Oreo because you get notifications of apps running in the background, but that's pretty easy to block
Keeping the phone cool can also help avoid the defect in the Snapdragon 810 that causes the BLOD (boot loop of death), which usually occurs when the solder holding the processor to the mother board develops cracks.
Based on posts I've seen in this forum most people begin to experience battery or boot loop issues after about a year or so. I've had my 6P for about a year and have not had any battery, heat, or boot loop issues. In my experience, taking care of your phone and being "extra nice" to it is the key to prolonging its life. After 2 years of using my Nexus 6, battery life on the day I sold it was just as good as day I unboxed it. I don't want to jinx myself, but the same goes for my 6P. After almost a year of use I can still go 16+ hours off the charger with 4+ hours of SOT and 30% or more left in the battery when I plug it in at night.
Click to expand...
Click to collapse
Definitely going to try these methods on my brand new Nexus 6p. Thanks for posting that. Very helpful.

Battery draining too fast

ok, first: I'm on stock rom, december update. completely stock, not even flash twrp yet. been on this for... a week maybe. and there is a really weird thing happening: I charge my phone normally, original charger and cable and everything, but when I unplug, it goes down like... one percent per minute. like, from 100% to 80% in 20 minutes. if I'm using the phone it's even faster. it stops at 58%, and the drain is normal from this point on.
any thoughts?
no thoughts? I just cant understand. my phone is fully stock, theres no unusual app and such. keeps draining as water.
blowingoff said:
no thoughts? I just cant understand. my phone is fully stock, theres no unusual app and such. keeps draining as water.
Click to expand...
Click to collapse
You could try to press and hold the power button until your device reboots. While it reboots, plug in your charger and let it charge at least 1h more after it has reached 100%.
I don't know if this procedure really re-callibrates your battery, got this from the "official" Moto forums. At least you can't harm your device with it.
thorin0815 said:
You could try to press and hold the power button until your device reboots. While it reboots, plug in your charger and let it charge at least 1h more after it has reached 100%.
I don't know if this procedure really re-callibrates your battery, got this from the "official" Moto forums. At least you can't harm your device with it.
Click to expand...
Click to collapse
tried this method and a curioud thing is that the phone didn't go over 93%. it stopped charging at this point
just a lil update: I just charged my phone with a non turbopower charger (I have two of those from moto) and... my phone came back to normal.
seems to be that it was charging properly with my turbopower charger, and... after trting a regular chsrger, its charging with my turbo again.
weird, isnt it?
blowingoff said:
just a lil update: I just charged my phone with a non turbopower charger (I have two of those from moto) and... my phone came back to normal.
seems to be that it was charging properly with my turbopower charger, and... after trting a regular chsrger, its charging with my turbo again.
weird, isnt it?
Click to expand...
Click to collapse
I was going to suggest the same thing as I have been experiencing that the battery lasts much longer when charged via a regular charger rather than with turbo. Try using a regular charger for overnight charging & see if you notice an increase in battery life.
I'm a heavy user with 125+ Apps installed now down to (60-80) & use it daily for 6-8 hours straight but I noticed after about a year with my Moto G4 Plus XT1644 RETAIL US my battery life was dying literally a full (turbo-charge) only lasted 30 mins & then it was dead. I then decided to bootloader unlock my device & that improved my battery tremendously but I found that custom roms have issues with either displaying the bars correctly or are just weaker due to some proprietary software. So for two weeks I've been fixing one thing & having another issue with something else.
I'm officially back on stock nougat with December security update & soon to be twrp+magisk. It seems to be the most stable & doesn't have the software issue with the bars which was a dealbreaker for me.
Report back if you find differences in battery using a standard charger vs the official turbo one!
Icesmash said:
I was going to suggest the same thing as I have been experiencing that the battery lasts much longer when charged via a regular charger rather than with turbo. Try using a regular charger for overnight charging & see if you notice an increase in battery life.
I'm a heavy user with 125+ Apps installed now down to (60-80) & use it daily for 6-8 hours straight but I noticed after about a year with my Moto G4 Plus XT1644 RETAIL US my battery life was dying literally a full (turbo-charge) only lasted 30 mins & then it was dead. I then decided to bootloader unlock my device & that improved my battery tremendously but I found that custom roms have issues with either displaying the bars correctly or are just weaker due to some proprietary software. So for two weeks I've been fixing one thing & having another issue with something else.
I'm officially back on stock nougat with December security update & soon to be twrp+magisk. It seems to be the most stable & doesn't have the software issue with the bars which was a dealbreaker for me.
Report back if you find differences in battery using a standard charger vs the official turbo one!
Click to expand...
Click to collapse
man, I just needed to charge once with a regular charger and everything came back to normal. I'll try again and see if theres difference. thank you for replying!

Weird charging issue with Moto G5 Plus

Peace be upon you Brothers
For the past couple of days, I've been facing this weird charging issue with my Moto G5 Plus. When I plug the charger in - the phone says it's charging, but the battery percentage remains the same for hours. After 2-3 hours of charging this way, if I unplug the charger and replug it, within a couple of seconds the battery capacity suddenly shoots up to 100%. I have the original Motorola charger, a Nokia/Microsoft charger, and a battery pack that I've tried with same results. Any advice?
faheem.twoface said:
Peace be upon you Brothers
For the past couple of days, I've been facing this weird charging issue with my Moto G5 Plus. When I plug the charger in - the phone says it's charging, but the battery percentage remains the same for hours. After 2-3 hours of charging this way, if I unplug the charger and replug it, within a couple of seconds the battery capacity suddenly shoots up to 100%. I have the original Motorola charger, a Nokia/Microsoft charger, and a battery pack that I've tried with same results. Any advice?
Click to expand...
Click to collapse
I don't have much to offer, but is it rooted? If it is, you can try a battery calibration app to try to recalibrate the battery, although I doubt that would help. It seems like it's charging fine but the system isn't registering the battery life until you unplug the phone and it forces the system to check the battery life (in case it's at 0-1% and has to shut down.)
In any case, if it's rooted, it's worth a try.
Drkmatr1984 said:
I don't have much to offer, but is it rooted? If it is, you can try a battery calibration app to try to recalibrate the battery, although I doubt that would help. It seems like it's charging fine but the system isn't registering the battery life until you unplug the phone and it forces the system to check the battery life (in case it's at 0-1% and has to shut down.)
In any case, if it's rooted, it's worth a try.
Click to expand...
Click to collapse
Battery calibration is a fake.
Maybe your battery is dead... it happens...
nicolap8 said:
Battery calibration is a fake.
Maybe your battery is dead... it happens...
Click to expand...
Click to collapse
Oh hey, you're right! I just remembered it was something people recommended back in the day with custom roms and thought I'd suggest it.
Drkmatr1984 said:
I don't have much to offer, but is it rooted? If it is, you can try a battery calibration app to try to recalibrate the battery, although I doubt that would help. It seems like it's charging fine but the system isn't registering the battery life until you unplug the phone and it forces the system to check the battery life (in case it's at 0-1% and has to shut down.)
In any case, if it's rooted, it's worth a try.
Click to expand...
Click to collapse
Thankyou for replying...
The issue came 4 days back when the phone was still running stock rom oreo. I thought the problem came due to the latest security update. But i rooted and install custom romed my phone yesterday and the problem still persists.
faheem.twoface said:
Thankyou for replying...
The issue came 4 days back when the phone was still running stock rom oreo. I thought the problem came due to the latest security update. But i rooted and install custom romed my phone yesterday and the problem still persists.
Click to expand...
Click to collapse
Change charger. If the problem persists change battery.
faheem.twoface said:
Thankyou for replying...
The issue came 4 days back when the phone was still running stock rom oreo. I thought the problem came due to the latest security update. But i rooted and install custom romed my phone yesterday and the problem still persists.
Click to expand...
Click to collapse
How long the battery will give you life if you charge it for 2 to 3 hours???
riyan65 said:
How long the battery will give you life if you charge it for 2 to 3 hours???
Click to expand...
Click to collapse
Now i am calibrating the battery in hope if it resolves charging issue. I connect the switched off phone when it shuts itself down at 0 % to the charger, it shoots upto 70 % sometimes 60, other times it shows 80 %. The number gradually decreases to 2 % during the charging. After 2 to 3 hours when i switch on the phone it shows a charged battery upto 70 to 80 %. And give me a wonderfully remarkable stand by time as i assumed that the custom ROM. It discharges normally. I cannot understand the nature of it cause i like to use my phone when it is 100 % charged and use it untill it reaches 15 %.
faheem.twoface said:
Now i am calibrating the battery in hope if it resolves charging issue. I connect the switched off phone when it shuts itself down at 0 % to the charger, it shoots upto 70 % sometimes 60, other times it shows 80 %. The number gradually decreases to 2 % during the charging. After 2 to 3 hours when i switch on the phone it shows a charged battery upto 70 to 80 %. And give me a wonderfully remarkable stand by time as i assumed that the custom ROM. It discharges normally. I cannot understand the nature of it cause i like to use my phone when it is 100 % charged and use it untill it reaches 15 %.
Click to expand...
Click to collapse
It seems the battery is good and, it just need the battery calibration.as it is giving a long life. But you should not fully charge the battery as lithium ion battery is capable of full charge,so you should charge it upto 80%-90%.

Bad Charging

Hi,
I own a Galaxy Not 10.1 2014 Wifi (SM-P600) currently running RessurectionRemix (https://forum.xda-developers.com/ga...om-resurrection-remix-n-sm-p600-wifi-t3606313)
Last year I replaced my battery with a new Samsung Original battery. But now i cant get the battery to charge to 100%. It always stops at ~45%.
If i check the charge current with the app Ampere it says maximum 450mA. It makes no difference which charger or cable I use.
Because of the loose fit of the MicroUSB connector I also replaced the connector unit.
Ampere also says that the battery is in good condition.
I also measured the battery voltage using a multimeter directly on the terminals of the two cells. Both cells had around 4.2V when the tablet stopped charging and showed a batterylevel of ~45%.
Is there anything I can do to get 100% and a higher charge current. Because now even if I plug the tablet into the charger the battery keeps draining while using it.
HamburgerJungeJr said:
Hi,
I own a Galaxy Not 10.1 2014 Wifi (SM-P600) currently running RessurectionRemix (https://forum.xda-developers.com/ga...om-resurrection-remix-n-sm-p600-wifi-t3606313)
Last year I replaced my battery with a new Samsung Original battery. But now i cant get the battery to charge to 100%. It always stops at ~45%.
If i check the charge current with the app Ampere it says maximum 450mA. It makes no difference which charger or cable I use.
Because of the loose fit of the MicroUSB connector I also replaced the connector unit.
Ampere also says that the battery is in good condition.
I also measured the battery voltage using a multimeter directly on the terminals of the two cells. Both cells had around 4.2V when the tablet stopped charging and showed a batterylevel of ~45%.
Is there anything I can do to get 100% and a higher charge current. Because now even if I plug the tablet into the charger the battery keeps draining while using it.
Click to expand...
Click to collapse
This is probably not what you're going to want to hear, but I faced the exact same issue and decided to power cycle the battery (drain it fully, charge it up to 100%). I got to the drain fully part and then it wouldn't charge anymore. I had tried the same thing as you with multiple cords and tried charging from a couple of different power banks as well.
My advice if you love your device like I do...buy another battery and keep it plugged in until you can swap it out with a new one. Once it hit 1% it was gone for good. This happens to me every 1-2 years...I've changed the battery in mine 3 times. Personally I think it's the OEM replacement batteries that are garbage. Next time I'm going to buy the newpower99 one and see if it lasts longer.
TLDR: keep it plugged in, buy a new battery, replace ASAP.
If you do get it working though I would love to hear your solution in case it happens again!
Well I did find a "solution".
It seems that the power management is quite bad on the Samsung devices, which means it has to be reseted from time to time. I could fix it partially by disconnecting the battery for ~10 Minutes and reconnecting it.
Now I got 75-80% charge and a reasonably charge current. But now the low voltage detection seems to be a bit off. At ~25% the screens stars flickering and it turns off after a short time.
I found this hint in the comments of a YouTube video about replacing the battery or charging connector.
HamburgerJungeJr said:
Well I did find a "solution".
It seems that the power management is quite bad on the Samsung devices, which means it has to be reseted from time to time. I could fix it partially by disconnecting the battery for ~10 Minutes and reconnecting it.
Now I got 75-80% charge and a reasonably charge current. But now the low voltage detection seems to be a bit off. At ~25% the screens stars flickering and it turns off after a short time.
I found this hint in the comments of a YouTube video about replacing the battery or charging connector.
Click to expand...
Click to collapse
I will definitely try that out thank you! Mine does that at around 10% and there are times the battery will say it's at 30% then drop to <5% in a few minutes. I just leave it on the charger over night now which I know isn't the best for battery life but at least it keeps it on when I use it
cheers
Battery management is voltage based. The Android Coulometer mainly has to filter short voltage drops caused by high cpu load.
If the Coulometer begins to show sudden changes in capacity and causes premature shutdowns, you can flash the coulometer firmware, if you're running stock rom. Reinstalling stock rom in Download Mode should also help.
There are only few sources on the net dealing with this coulometer thing and only for certain devices.
But if you do nothing, the capacity jumps will fade away with time. It took months on an old tablet of mine, but the period of time may depend on the time since the last full factory reset or system recovery. And my (and your) Note are older today than this tablet back then...
Then there's always real cable and battery isdues.

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