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charging very slow!

help,my note now charges very slow 4-5hrs without using.
it depletes if im using it while charging.
could change rom,kernel be a fix?
thanks

Heading for a new battery me thinks.
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Are you using your stock charger? If not, how many A does your charger have?

Abagnale said:
Are you using your stock charger? If not, how many A does your charger have?
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i just bought an extra battery.lets see how it goes.
i noticed my old battery had a small bump in the middle seems bloated. hmm
i remembered last time i used xperia s charger trice,it has 1.5kA it realy charge fast. i think that caused the problem?
when my sister charge her xperia s, the charger just explode.. and she scolded me why am i using her charger.
im using my old charger which is 700ma but it charge just fine. lately when i use the xperia s charger and went back to my old one,it was acting strange. it charges really slow and if i use the phone,it depletes even when charging.
im going to flash another rom,and see if its rom related or the battery isue.
thanks for replying.

ok,im on with my new battery but still depletes while im using it. im just browsing. on the widget it say im currently charging with 1000ma. wierd, dont know how to solve this.

[SYMPTOMS I HAD] it would charge very slowly, if the screen is on, it would actually discharge. When the phone was off, it would slowly charge (i.e. >5 hours to full charge). and it would discharge very quickly (i.e. 1% per 2~3 mins). When the phone was off, it would charge sometimes and sometimes not. Figured that when the phone was off, you really are negating much of the software influences so this could be a hardware issue, however, wanted to make sure before going down the hardware route.
Did some research, searched the forums and searched some more.
I had tried 5 different chargers, 3 different USB cables and had bought a replacement battery.
Steps taken:
1. Cleaned with thick paper - no change
2. Cleaned with thick paper & rubbing alcohol - no change
3. Cleared with Compressed gas - no change (on first charge, there was a change but then back to normal)
4. Attempted to clean with vacuum (with finer nozzle) - no change
5. Used charging apps from playstore - didn't show charging details - considered the port was faulty
6. Tried to find default references for charging as mentioned in one of the forums - unable to find it
7. Found a replacement USB port charger board and replaced it - working fine
So it could be the actual port is faulty. If you symptoms match, it could be time to take it into the service centre, restoring to stock first of course. The note I am using had slow charging for about 2 months prior to really slow charging.

i had change the usb port and its back to normal. 2hrs at least and its full.

Fingers crossed, thats all you need.

problems with charging zuk z2 pro

hi guys / girls,
i have had my zuk z2 pro (z2121) 6gb / 128gb for about a year now and i am really satisfied with the phone overall.
Despite my satisfaction i now have a big issue: it will not charge ! :crying::crying:
What i have done:
i was on android 7 in AEX rom, now i am on android 8 in AEX 5.4 for about 2 weeks now.
i had to install the latest radio version to get my phone back running since i had problems after flashing (no sensors worked at all).
now: the phone was at around 8 % battery last night when i plugged in the charger.. it didn't show "charging slowly" on the lockscreen, what i found a bit weird.
this morning the phone was dead and the battery was empty. i have booted up in fastboot mode or recovery (i'm not sure, but not twrp) and connected the charger again, now it was charging !! at 0,42 amperes approximately. so not much but at least it was charging.
unpatience as i am i tried to boot after about 1,5 - 2 hours to see what the battery had done in this time.... android shows 15 % ... i plugged in the charger again and :crying::crying: again no charging.
android does show the lightning symbol, but there is no power consumption measured from the charger.
what could this be ?
i have tried 3 chargers, 3 different cables (1 new) so i suppose that cannot be the source of my misery.
what i find the most weird is that there is power consumption from the charger when the fastboot menu shows up... after there was 15% in the battery i don't get that either :crying::crying:
anyone here to help ??? please.. i have allready contacted 2 repair firms nearby but both of them are a bit scared by the fact that it;s a chinese phone and they cannot give warranty on a new battery.

thanks to mar.ur here on the forum (he helped me before, the good man) i have got the solution.
As i had been reading on more forums, there are more users having the likewise problem, this is (for now at least) the solution:
Go to twrp / advanced / file manager / data / system and delete battery stats
in my phone i had 3 files, i deleted them all.
next tip from mar.ur was to charge to 100% and use till about 5% before charging. that might have something to do with creating new battery stats i suppose
thanks again mariusz

hans.vinkers said:
thanks to mar.ur here on the forum (he helped me before, the good man) i have got the solution.
As i had been reading on more forums, there are more users having the likewise problem, this is (for now at least) the solution:
Go to twrp / advanced / file manager / data / system and delete battery stats
in my phone i had 3 files, i deleted them all.
next tip from mar.ur was to charge to 100% and use till about 5% before charging. that might have something to do with creating new battery stats i suppose
thanks again mariusz
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yeah, but it should be charge faster. ~ 2 amps with correct cable and charger. 420mA is a bit low... how did u figure that out? Did u measure?

I have the same problem of charging at 420mah at most. The phone used to charge at 2amps with same cable and charger. Same cable and charger charges my other phone at 1.1amp, which is its max. Did you find a solution for this?

hans.vinkers said:
thanks to mar.ur here on the forum (he helped me before, the good man) i have got the solution.
As i had been reading on more forums, there are more users having the likewise problem, this is (for now at least) the solution:
Go to twrp / advanced / file manager / data / system and delete battery stats
in my phone i had 3 files, i deleted them all.
next tip from mar.ur was to charge to 100% and use till about 5% before charging. that might have something to do with creating new battery stats i suppose
thanks again mariusz
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Click to collapse
bgenc said:
I have the same problem of charging at 420mah at most. The phone used to charge at 2amps with same cable and charger. Same cable and charger charges my other phone at 1.1amp, which is its max. Did you find a solution for this?
Click to expand...
Click to collapse
See above...

Same here, only charging at 0.42A only with some selected, older chargers. Using some more modern chargers with more Ampere does not work. Charging symbol in the taskbar, but not charging. Measuring with an USB voltage meter it just says 0A and Voltage is at 5.12v on modern chargers. Strangely it chargered in an rented citröen c3 with 1.5A when I was in holidays.
QC only worked for the first two months when I got the phone.
Tried deleting battery stats, but still no QC or charging with more than 420mA.

Look in the charge port for dust/lint/etc. and carefully blow/pick out any see.
What does happen when you connect your phone with PC ? Does it still charging 420 mA ? Sync data works good ? How long does it take to get full baterry from almost empty ?

Super slow charging problem

Please help me get fast charging back. Like 3 months back, my phone suddenly stopped charging fast and since then its charging super slow. Like if I use it while charging it actually discharge. While switched off it takes 4+ hrs to fully charge.
I have replaced battery, usb assembly, charger, cable everything but to no avail. Now I think its a software issue. Maybe some kernel, firmware I screwed. I have tried Syberia, Xiaomi EU, Rev OS roms as well.
Ampere app never goes beyond 300 mah reading, whatever charge cable combination I try. Please throw if insights.
Thanks a lot

shashanksinghal said:
Please help me get fast charging back. Like 3 months back, my phone suddenly stopped charging fast and since then its charging super slow. Like if I use it while charging it actually discharge. While switched off it takes 4+ hrs to fully charge.
I have replaced battery, usb assembly, charger, cable everything but to no avail. Now I think its a software issue. Maybe some kernel, firmware I screwed. I have tried Syberia, Xiaomi EU, Rev OS roms as well.
Ampere app never goes beyond 300 mah reading, whatever charge cable combination I try. Please throw if insights.
Thanks a lot
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It charger problems change I have faced it too remember but a fast charger

j4472 said:
It charger problems change I have faced it too remember but a fast charger
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Click to collapse
I have a problem like this too. but it's finished by replacing the charger adapter

Fast charging issues

Hey guys! A few weeks ago I noticed that fast charging doesn't work with my usual power sources (Xiaomi Power Bank, Xiaomi QI Car Charger), even though it worked before that. I only get around 850 mAh with them. The only way it works if I use the original wall charger. I use the original and a Baseus cable. It is also slow with the phone turned off. Any ideas what causes this?

what rom

LilProphet said:
Hey guys! A few weeks ago I noticed that fast charging doesn't work with my usual power sources (Xiaomi Power Bank, Xiaomi QI Car Charger), even though it worked before that. I only get around 850 mAh with them. The only way it works if I use the original wall charger. I use the original and a Baseus cable. It is also slow with the phone turned off. Any ideas what causes this?
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The fast charge brick is needed to power the basic functions of the charger. I suggest you get the 27W brick in order to get the 20w fast wireless charging

nikolas60 said:
what rom
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Xiaomi.eu ROM, I unlocked the bootloader a few weeks before this issue, but the problem also persists when the phone is turned off. Should I try to flash back the stock ROM with MI Flash?

My mi9 lite phone went slow charging too. Phone usually got a full charge after 2hrs but it went to 4hours to get a full charge after i connected my phone to transfer files to my laptop through a usb cable. What i did to get the 2hrs charging was reconnect my phone to the laptop using the same usb cable. At the phone a pop up appears with 3 choices...1st choice(forgot),2nd transfer files, 3rd transfer photos. I tapped the 1st choice and disconnected my phone. And i got my 2hrs full charging time back. Hope this will help.

I am on 12.0.2 and takes 2 hours to charge 90% mean that ~1.5 minute 1% charge
before flashing this ROM via EDL method took around ~1 hour with the original charger to charge from 20% to 90%

Battery/Charging issue

Hey everyone, how y'all doing?
I've got this problem for 2 months now where the charging has been super slow and no idea why. I am using the official charger and cable that came with the phone, I used my wife's s20's charger with same result and a third party charger with 3 different cables with similar results. Accubattery recorded that my phone's battery health is at 86% (3460mah) should I change it and lose my water/splash proof?
Oh yes I have flashed a few different ROMs (currently using Dr Ketan) with the same results except for evolution ROM, with the aosp ROM I was able to charge my phone from 14 percent to 100 in 90 minutes which is kinda weird...
Any advice would really help thank you

Supracer said:
Hey everyone, how y'all doing?
I've got this problem for 2 months now where the charging has been super slow and no idea why. I am using the official charger and cable that came with the phone, I used my wife's s20's charger with the same result and a third party charger with 3 different cables with similar results. Accubattery recorded that my phone's battery health is at 86% (3460mah) should I change it and lose my water/splash proof?
Oh yes I have flashed a few different ROMs (currently using Dr Ketan) with the same results except for evolution ROM, with the aosp ROM I was able to charge my phone from 14 percent to 100 in 90 minutes which is kinda weird...
Any advice would really help thank you
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Click to collapse
Get yourself one of those 2$ USB doctors. It will tell you how much power the phone is taking in. i.e. Fast charge should be 9 volts at about .8 amps and slow charge 5 volts at 1.5+ Amps.
Make sure your port is clean and moisture levels are low i.e should be below 80%.
I had this problem once when moisture was over 80%. It then went away. But at that time the phone will warn you about the extra moisture. It will say Moisture detected in USB port Fast Charging disabled.
The second time this happened was after the update to android 10. Had slow charging and overheating and audio acting up but that went away after re-setting the phone a few times and clearing cache.
The latest update to Android 10 seems to be causing a lot of issues with Display, Audio and overheating / slow charging. My audio chip finally stopped working. And the phone is now with Samsung.
My 2 cents if you see overheating and slow charging. Stop using the phone while its still working and take it to Samsung. Because if you continue to use it something will fail. And Samsung will want to give you a big fat bill to change it.

RonChinoy said:
Get yourself one of those 2$ USB doctors. It will tell you how much power the phone is taking in. i.e. Fast charge should be 9 volts at about .8 amps and slow charge 5 volts at 1.5+ Amps.
Make sure your port is clean and moisture levels are low i.e should be below 80%.
I had this problem once when moisture was over 80%. It then went away. But at that time the phone will warn you about the extra moisture. It will say Moisture detected in USB port Fast Charging disabled.
The second time this happened was after the update to android 10. Had slow charging and overheating and audio acting up but that went away after re-setting the phone a few times and clearing cache.
The latest update to Android 10 seems to be causing a lot of issues with Display, Audio and overheating / slow charging. My audio chip finally stopped working. And the phone is now with Samsung.
My 2 cents if you see overheating and slow charging. Stop using the phone while its still working and take it to Samsung. Because if you continue to use it something will fail. And Samsung will want to give you a big fat bill to change it.
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Click to collapse
Thanks for the advice and I'll see to it. It's just yeah it seems like after android 10 things have been degraded

So apparently turning off fast charging in options gives me a faster charge time. With fast charge on it takes from 7% to 100% in 3 and a half hours and with fast charge off it takes 2 hours only.... Maybe my fast charging "chip" / "module" is broke?

Supracer said:
So apparently turning off fast charging in options gives me a faster charge time. With fast charge on it takes from 7% to 100% in 3 and a half hours and with fast charge off it takes 2 hours only.... Maybe my fast charging "chip" / "module" is broke?
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Have you tried installing the stock OS back onto your device?

iceepyon said:
Have you tried installing the stock OS back onto your device?
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Yes I have tried, the June update one and got the same results. I even formatted everything and went bone stock with the same results. I'm thinking of using some contact cleaner on the usb port but hesitant to do that...

Supracer said:
Yes I have tried, the June update one and got the same results. I even formatted everything and went bone stock with the same results. I'm thinking of using some contact cleaner on the usb port but hesitant to do that...
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Click to collapse
Unless you see something in there I do not advise poking around inside.
I suspect your problem is that the Samsung USB cable packed up. And your trying with all kinds of cables and chargers. Go to a Samsung Store and ask them to check with a Samsung Cable and Charger.
I went thru this circus a few months back.
The only solution is to get a Samsung Charger with a Samsung Cable.
Then make sure fast charge is on. For wireless and wired charging. Wipe your cache and you should be ok.
I have seen way too many damaged USB ports from people trying to clean it. When there was nothing in there to start with. Use compressed air. If you see something in there.