Galaxy Fold Z2 battery dropping to zero from 50% - Samsung Galaxy Z Fold 2 Questions & Answers

Hey fourm, sorry for the long read but if anyone is technically savvy with batteries or voltages/electrical components please read! this might not be specific to a Fold but any device may suffer from what my device is suffering from.
I have recently had issues with my Galaxy Fold Z2 and it unexpectedly dropping to 0% charge, the first time this happened yesterday i was in an application and was switching from the larger display into the smaller one, upon closing the display the phone shut down and i wasn't able to get anylife out of the phone except a vibration when holding the power button, but nothing on the screen. I had about 35% battery at the time but all of a sudden it was at 0, after putting it on the charger it spring back into life. Today however i experienced an even worse problem... My battery was around 55% and i was connecting my phone to my cars bluetooth and importing contacts to the cars console, suddenly the battery went from 55% down to 9% instantly! i was shocked and took a screenshot of the battery graph showing its gradual decline from 100% to 55% but not to 9% to highlight the sudden drop, the battery status on the top of the notification bar was showing 9% all of a sudden but the graph wasnt just to actually see the drop! after that drop in battery it only took about a 30 seconds for that 9% of battery to jump down to 1% again in an instant fashion, following this only a few seconds later it shut down.I was thinking it could just be a dodgy battery for whatever reason but after trying to charge my phone after this sudden crash from 55%-9%-Flat i was unable to charge it up. The phone would signify that it was charging but not giving me a percentage, it would show the charging animation (the animation you get when phone is off and charging) but would only last for around 3-5 seconds before shutting off again and showing the charging icon again, and then shutting off again and rinse and repeat on a loop without charging but attempting too and resetting every few seconds! So for about an hour i couldnt get it to boot/charger properly and i almost gave up, but i decided to try a different charger, i was using the 25w supplied charger but i switched to a 15w older one and the phone ran the charge animation again however this time it identified the battery was charged at 55% rather that it not showing any charge level and resetting and trying again as it did before, this time it went right to 55% and from here the phone booted up and is working normally again!
Im really not sure whats wrong, im starting a process to send the phone back but i really wish to know whats wrong with my device! if anyone has any clue to this strange behaviour please let me know!

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Samsung Galaxy Z Fold 2 Questions & Answers

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Temp Warning on dead battery in less than 6 hours?

First day of a new job so I put my phone on a Work profile using PhoneWeaver (paid). Had the phone vibrate a few times telling me I had emails, and then one last time telling me the battery was almost dead, then it died. Had 6 hours of life out of it, not even joking.
Once I got to the car to charge it and head home, the phone went into the display where the battery icon shows up and the phone is off, but flashed a yellow warning triangle with a red thermometer next to it on the right side of the battery. Wish I had a camera on me to take a picture, but I immediately pulled the battery door off and placed it on an A/C vent on the car, and the phone died again since it wasn't connected to the charger anymore.
When I finally got the phone home and charging, I went to the battery status screen to see what was draining the battery, and even though it was showing what was going on since the power cycle, it showed the Display was accountable for 94% - still not convinced, I went to my PhoneWeaver settings to see if the Work profile had Wifi or GPS on the whole day, and it didn't have anything out of the ordinary. Only thing I can come up with is that when the emails and texts came in and I didn't check them, my phone unlocked in my pocket and left the screen on the whole day.
Has anyone else seen the overheating / temp warning screen on the battery status level display when the phone is off? What caused it in your situation? I have a hard time believing that if I wear heavy khaki shorts as I've been doing since I got the phone on the 19th, the phone won't unlock and in turn won't overheat, but when I wear dress pants on my first day of work at a new job, the phone unlocks, runs the display all day, and my lightweight slacks make the phone overheat????
sorry for the long narrative, I just wanted to give all the details of what happened in case anyone has any advice or similar experiences.... thanks in advance!
never, i recommend restoring factory settings and using it as is for a day and see if this happens again. It could be something you installed. If you have a similar experience, return your phone and get a replacement.
make sure they replace your battery incase it got fked from the overheating caused by the phone.
well, day two of work and my phone is just now at 20 percent, 14 hours later, lots of texts and emails and everything else

[Q] Charging and battery indicator

Hi everyone
My problem is.. my DS started to charge slowly.
Now it doesn't really charge slowly, If I check the voltage, I will get like 4220mv but as soon as it reaches that, the charging graph just goes flat.
If say I have charged it to 70% and it started going slow. i switch it off, place on the charger, and the lamp goes green. I turn it on, and it is showing 100%.
I have tried calibrations, diffirent kernels, wiping, factory resets e.t.c.
Another thing is that if I will run a v6 battery calibrator,it will show that actually I should have a 100% charge although a phone is showing only 70%.
So the summary: Phone charges normally when off (when recovery monitors charging), showing the correct voltage when on... But showing the wrong percentage if on charge.
Also sometimes if the battery is like 14% left. And I turn the phone off and then on again, it will show 22% bearing the same voltage as when it was 14%.
Question: Is there any way to tweak the battery indicator so it would show % values same as the v6 calibrator does it or is it a hardware fault, if yes, which part of it ?
This happens to me on my older (original) battery, but not my new one. I bought the second battery when this problem started happening. So, I think it's just a symptom of an old battery.
By the way, if you leave it on charge long enough, it will eventually jump up to 100%.
Other than this weird behaviour, it has no real impact on anything.
Sent from my Nexus 7
Thought so, mines been acting similarly lately, but strangely enough it seems to be getting better
I think I found out..
I actually purchased a new battery recently, because my old one was jumping like crazy and started discharging in a few hours..
This new battery I bought from a mobile repair shop.
It is a cheap chinese battery with no name, anyhow I just took it out to take a look at it...
And guess what, it sais 1200mah..
Can the phone be confused because of that ?

Battery/Phone Shutting Down

Recently had to replace battery.
Phone was shutting almost immediately after it was disconnected from charger. Charging status when not switched on showed the battery kinda going in reverse. Phone was really odd as it would suggest the battery had 100% charge and then within minutes of disconnecting it was shutting down.
I tried a factory reset/refresh with no change. So I ordered a Genuine replacement battery off flea bay and installed that last Thursday.
Initially phone seemed ok, then wen a bit weird and shut down even though charge was like at 70% or so. Wouldn't restart until plugged in and then in shutdown mode the battery/charging indicator would show 0% and then very quickly showed 70%. Good bit though was it was going up and not down like before.
Fully charged phone overnight. It then seemed really good and lasted until Tuesday with 66% charge still showing. I had not installed FB or Twitter which made a huge difference. Then yesterday it just shutdown again. When plugged in showed 0%, within minutes back to 70% and then charged to 100% in the space of an hour or so.
So I am looking for any advice. Is this just calibration issues that the phone needs to get past. Is it possible the phone has corruption int he ROM.
I appreciate it might be a hardware fault but seems weird that the replacement battery is clearly showing a big improvement suggesting battery was EOL after 2 years use.
TIA
G
GougeM said:
Recently had to replace battery.
Phone was shutting almost immediately after it was disconnected from charger. Charging status when not switched on showed the battery kinda going in reverse. Phone was really odd as it would suggest the battery had 100% charge and then within minutes of disconnecting it was shutting down.
I tried a factory reset/refresh with no change. So I ordered a Genuine replacement battery off flea bay and installed that last Thursday.
Initially phone seemed ok, then wen a bit weird and shut down even though charge was like at 70% or so. Wouldn't restart until plugged in and then in shutdown mode the battery/charging indicator would show 0% and then very quickly showed 70%. Good bit though was it was going up and not down like before.
Fully charged phone overnight. It then seemed really good and lasted until Tuesday with 66% charge still showing. I had not installed FB or Twitter which made a huge difference. Then yesterday it just shutdown again. When plugged in showed 0%, within minutes back to 70% and then charged to 100% in the space of an hour or so.
So I am looking for any advice. Is this just calibration issues that the phone needs to get past. Is it possible the phone has corruption int he ROM.
I appreciate it might be a hardware fault but seems weird that the replacement battery is clearly showing a big improvement suggesting battery was EOL after 2 years use.
TIA
G
Click to expand...
Click to collapse
Same problem here i will try to install the oficial rom of xt890 if works i back here if not i don't know what to do
Sooo............issue is still present. Odd thing which I am unable to confirm, due to rnadomness of shutdowns, it that I think it is slowly learning the state of the battery as it originally was shutting down at 70% after 2-3 days on standby. then 66% hen 56%. I did a clear cache partition and a fresh install but still the issue was present.
Clearly the new battery is lasting longer than the old one, just the phone does not seem to know to reduce the charge indicator all the way to 0%.
Anyone any idea why this might be happening.
TIA
G
Just to add i'm having the same problem.
Symptoms started last week running the stock kitkat rom so i ordered and a fitted a new battery. Initially everything looked good phone said 100% left it over night and noticed it had shut off when i came back to it. Plugged it in to the charger and it said 0% so i charged back to 100%, booted up android and almost immediately it begins discharging rapidly, i would say within 15 minutes its back down to 0%.. I've done this a few times now even left it on charge overnight for 8 hours but its still discharging rapidly everytime. The craziest thing is even if it says 0% in android i can still boot in to recovery and flash away so clearly there is charge in the battery its just android thats out of sync.
What i've tried so far:
Different wall chargers/USB leads/Outlets
Wiped everything in TWRP and flashed CM11
Factory Reset several times
Various battery calibration apps
My next step is going to be trying RSD to flash the stock ROM but beyond that i dont know what to do.
I'm experiencing EXACTLY THE SAME ISSUE with my Razr i, replaced the battery and it's still discharging very fast
Eventually managed to resolve my new battery issue simply by fully charging and discharging several times. It started to hold charge after the 7th charge and after several more discharges it's now up to full capacity.

galaxy j7 battery problem

i think my phone has some serious problems and i'm wondering if it's the battery dying or a short circuit
when i plug it on a charger while of it shows a normal charging image but how it switches from one animation to the other so i can see the status of battery percent it's like a short on the screen happened
it chargers to 100 but when i switch it on it shows mybe 95 but never 100 and if i connect it to a charger to get to 100 it only decreases
it gets warm now days which did not happen and it like drains 50% overnight which is obviously not normal. these two days the battery life is like 4 hours with internet wich with j7's battery it should not happen. if i switch it off and then on again i loose like 20% of battery and if that is all i had i get 0% and the phone doesnt switch on. the phone never had contact with water . it's been 4 days since this started and it happened all of sudden like today my phone stays up to two days at most and i just woke up it barely finishes a day without data and with power saving mode
i'm sure it's not about background apps or any activities because i hard reset it already and i don't have any app. and it's not about wifi or sync or poor network i tried all that. i did everything it didnt help. i could buy a new battery but i'm scared it might be a short because i don't think a battery can just die in one night like this.
can anyone help me with this or it's nothing serious and i have to change the battery
galaxy j700H
running custom rom enigma v6
i had a habbit of charging my phone when i sleep and unplug it in the morning and i always switched it off while charging. never used it while charging
311y said:
i think my phone has some serious problems and i'm wondering if it's the battery dying or a short circuit
when i plug it on a charger while of it shows a normal charging image but how it switches from one animation to the other so i can see the status of battery percent it's like a short on the screen happened
it chargers to 100 but when i switch it on it shows mybe 95 but never 100 and if i connect it to a charger to get to 100 it only decreases
it gets warm now days which did not happen and it like drains 50% which is obviously not normal. these two days the battery life is like 4 hours with internet wich with j7's battery it should not happen. if i switch it off and then on again i loose like 20% of battery and if that is all i had i get 0% and the phone doesnt switch on. the phone never had contact with water . it's been 4 days since this started and it happened all of sudden like today my phone stays up to two days at most and i just woke up it barely finishes a day without data and with power saving mode
i'm sure it's not about background apps or any activities because i hard reset it already and i don't have any app. and it's not about wifi or sync or poor network i tried all that. i did everything it didnt help. i could buy a new battery but i'm scared it might be a short because i don't think a battery can just die in one night like this.
can anyone help me with this or it's nothing serious and i have to change the battery
galaxy j700H
running custom rom enigma v6
i had a habbit of charging my phone when i sleep and unplug it in the morning and i always switched it off while charging. never used it while charging
Click to expand...
Click to collapse
same thing happening with me from last one week since i left my phone charge at night while i was sleeping. ? after unplugging it goes from 100% to 95% suddenly and battery backup dropped don't know what's happening and yes after removing battery and reinsert it it goes down by around 20% may be someone can help.
Also got same issue..just replace the battery
Sahibjeet Singh said:
Also got same issue..just replace the battery
Click to expand...
Click to collapse
Did it work for you... I mean how is the battery life after you have replaced it
311y said:
Did it work for you... I mean how is the battery life after you have replaced it
Click to expand...
Click to collapse
I get around 4hours of screen on time

Xperia Z5 not charging properly, random restarts and faulty battery indicator

I just had my Xperia Z5's battery replaced due to it bloating up. After two weeks, I noticed that the battery indicator isn't working properly.
It would go down from 100% really fast (even during standby - not using the phone) but stay around 30% down for a really long time. No difference in usage. Then it also started restarting on its own even during standby. I would check my phone and it would need me to input my pin saying its required after a restart. Another instance, I was still typing out a text message and it restarted on its own. The battery was around 60% before it restarted but after it turns on again the battery indicator showed that its at 40 something %. I don't think the battery would drain that much just from restarting.
Also, just today, it won't charge properly anymore. It will detect the charger, like it would make the sound when you plug it in but the battery icon won't change to the charging icon and the battery will continue to drain. When turned off, it would show the Sony logo then battery level on the screen but will stay at 0% or whatever % it was left at and will continue draining.
So my phone just died earlier and I just went to plug it in hoping it would still work. The battery was stuck at 0% for the longest time so I just went and left it for a few hours. Coming back to it, I noticed that the LED indicator is green. I pressed the power button and it showed 100%, then I tried turning on the phone. It still turned on, showing 100% on the battery icon and could be used like usual.
I can still use the phone, barely, but this issue is really annoying. I'm not even sure if the next time it drains it would charge again.
So far, I've tried:
using a different cable and charger
doing a factory reset
doing a repair via Xperia Companion
But the issue still persists...
Is there anything else I can do on my end to fix this?
You should replace your battery
Hello.
I'm sorry to hear that your Xperia Z5 got this problem.
Here're some personal experiences:
1.Just replace a battery for it.My Xperia Z5 had same issue last month:Its battery lasts for only 2 or 3 hours,and charges much faster than before.Then I think maybe the battery life loss too much,so I bought a battery from taobao(A Chinese Website),then everything's fine just as when I buy it.
2.According to your description,maybe the sub board(It's responsible for charging and data transmission)is broken too.You can find a used one at ebay.
That's all.I hope this message can help you.And...I'm a Chinese so maybe you can't understand my Chinglish(It means "Chinese English" )...Sorry for that.

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