MI5 Lineage OS 14.1 QC 3.0 tests and findings - Xiaomi Mi 5 Questions & Answers

Lineage OS 14.1 is a very good ROM. Thanks to @bgcngm. However, we find that charging is shower than that in CM 13.0. Here are some tests and findings by me.
I test on four conditions - power off, first time after power on, second time after power on, in TWRP 3.0.2-3.
Battery level is around 93% when I do the test. It is a little high, but if you read following findings, you will find that it is not a problem.
The charger I used is EQ-24BCN from LeEco. Output ability is 3.6~8V/3A, 12V/2A. It is a QC 3.0 charger. You can find it in official list of QC from Qcom website. The link is
Code:
https://www.qualcomm.com/documents/quick-charge-device-list
1. Power off.
{
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There are four signals in the picture. Green and blue are USB D+ and D-(2V/div). Yellow is output voltage of charger(5V/div). Pink is output current of charger(1A/div). Output voltage changes from 5V to 9V, and that is the time charger is identified as QC2.0. And then output voltage changes drop down to 5V and rises to around 6V, and that is the time charger is identified as QC3.0. So QC 3.0 is working when the phone is power off.
2. In TWRP 3.0.2-3
I think TWRP 3.0.2-3 is using CM 13.0 kernel. Correct me if I am wrong. In the picture, voltage of charger changes from 5V to 9V and then keeps the value. So the charger is identified as QC2.0. I read the value of
Code:
/sys/class/power_supply/usb/type
, and it is USB_HVDCP. The value also indicates that it is recognized as QC 2.0 charger.
3. The first time after power on
The behavior is quite similar compared to power off condition. There is only a short time when output voltage of charger is 9V, and then QC 3.0 is detected. The value of /sys/class/power_supply/usb/type is USB_HVDCP_3. So QC 3.0 is working after power on.
4. The second time after power on.
Unfortunately, QC will not work if you plug the charger again. Output voltage is always 5V, and the value of /sys/class/power_supply/usb/type is USB_DCP. QC 3.0 charger is recognized as normal charger.
Other findings:
QC 3.0 will not work each time after power on. QC will not work if you simply reboot the phone. It will only work when QC works normally and then power on. For example, power off the phone, plug in QC 3.0 charger, wait until battery ico presents, then QC is working, plug out charger, power on the phone, wait until Android boots, and at last plug in charger again, and then QC 3.0 will work. I find only two state when QC will always work - one is power off, the other is TWRP 3.0.2-2 (I think the reason is that it uses CM13 kernel).
If QC 3.0 charger is successfully recognized, the value of /sys/class/power_supply/usb/type should be USB_HVDCP_3. I am not an expert in software, so correct me if I am wrong. I hope that anyone who wants to help can help to read the value of /sys/class/power_supply/usb/type if you find QC may work. Let's find all situations that QC will work, and I think it will help @bgcngm fix the issue.
Update:
I have tried to replace hvdcp_opti binary with the one from dev 7.1.20 and stable 8.1.6.0. QC only works for the first time. The issue may not be related with hvdcp_opti binary, but it still can not be confirmed.
Further update:
I have complied cm-14.1 boot image with kernel source of cm-13.0 branch. QC 3.0 is confirmed to work normally. I believe the issue of QC is kernel-related. I may seek further to find what certain patches break QC 3.0.

One thing to add is that using lower quality cables or extension cables can mess up quick charging from own experience. Was using a 2m usb extension for a dock charger into a qc3.0 wall charger but it only left me with UpTo 1000mah while sometimes as low as 200-300mah. Without extension cable I get around 2500mAh with dock

another thing is that QC seems to work for roms using JDC's AOSP as a base like Zephyr

ngoralph said:
another thing is that QC seems to work for roms using JDC's AOSP as a base like Zephyr
Click to expand...
Click to collapse
I roughly read through the kernel sources of jdc's aosp. aosp-7.1.1 and aosp-6.0 have the same base. And it seems that jdc's aosp is based on cm13.0. I believe QC works fine on cm13, so it will also work on jdc's aosp. And cm14 has a new kernel base. So your findings is correct. However, kernel is not the only thing related with QC. Binary hvdcp_opti also plays a role. We may start with looking for which patches bgcngm forgot when he rebase cm14 kernel source. Whether the binary works normally is also a question.

Exactly the same results i have with my mi 5, QC3.0 workt, but only "sometimes".

I haven't tried charging with the phone off, but all three of my chargers (one of which is the one that came with the phone, which I've read elsewhere supports QC 2.0) had some form of quick charge working (could also see "Charging rapidly" on the lock screen whilst charging) in CM 13.
Since CM14.x/LOS14.x, it charges without QuickCharge (all three output USB_DCP for the /sys/class/power_supply/usb/type file in my current Jan 17,2017 LOS14.1 build).

asdxx said:
I haven't tried charging with the phone off, but all three of my chargers (one of which is the one that came with the phone, which I've read elsewhere supports QC 2.0) had some form of quick charge working (could also see "Charging rapidly" on the lock screen whilst charging) in CM 13.
Since CM14.x/LOS14.x, it charges without QuickCharge (all three output USB_DCP for the /sys/class/power_supply/usb/type file in my current Jan 17,2017 LOS14.1 build).
Click to expand...
Click to collapse
Me, too. But even it is recognized as USB_HVDCP_3 and QC 3.0 is confirmed to work using certain method, it does not show "Charging rapidly" on the lock screen. I do not know the reason. Both QC 2.0 and QC 3.0 charger works with CM13.

QC 3.0 works normally on cm-14.1 with kernel source of cm-13.0 branch. So I think we can make a conclusion that the issue of QC is related with the kernel.

deathscythemeng said:
QC 3.0 works normally on cm-14.1 with kernel source of cm-13.0 branch. So I think we can make a conclusion that the issue of QC is related with the kernel.
Click to expand...
Click to collapse
Can a simpleton like me use that cm13 kernel with the latest Lineage, or is that a recipe for disaster? I charged my phone with TWRP up and could see it charging at the ol' QC2/3 pace (around 18% charge in 10 mins) to further prove it's CM/LOS.

asdxx said:
Can a simpleton like me use that cm13 kernel with the latest Lineage, or is that a recipe for disaster? I charged my phone with TWRP up and could see it charging at the ol' QC2/3 pace (around 18% charge in 10 mins) to further prove it's CM/LOS.
Click to expand...
Click to collapse
cm-13.0 branch lacks some patches to work with latest firmware. To track latest CAF upstream source, old cm-13.0 base has to be abandoned, as it may have unexpected issues. Of cource, QC's not working normally is also an unexpected issue. Till now, I still can not locate where the issue really is. For now, if you want to use QC, just shut down the phone and then power on, and plug in charger and do not plug again, and QC will work, while the phone will not miss any calls.

Flashing Mokee, Cyanogenmod, China MIUI, QC3 never worked as supposed to for me.
But before every time I use to flash back Global MIUI,my QC3 charger worked like charmed and charged my MI5 very quickly.
But recently its not the case....looks like some kinda fast charging kernel issue...how can I solve it.
I really want my fast charging to work on MI5.
UPDATE : I did made sure my QC3 is working perfect on another phone and so no issue with my charger.

gotshoaib said:
Flashing Mokee, Cyanogenmod, China MIUI, QC3 never worked as supposed to for me.
But before every time I use to flash back Global MIUI,my QC3 charger worked like charmed and charged my MI5 very quickly.
But recently its not the case....looks like some kinda fast charging kernel issue...how can I solve it.
I really want my fast charging to work on MI5.
UPDATE : I did made sure my QC3 is working perfect on another phone and so no issue with my charger.
Click to expand...
Click to collapse
Use the DragonXia kernel, at least for the Lineage OS it works perfectly all the time. The firmware I used last time was the latest global stable.

georgekav33 said:
Use the DragonXia kernel, at least for the Lineage OS it works perfectly all the time. The firmware I used last time was the latest global stable.
Click to expand...
Click to collapse
I just tried this with the 20170314 I had installed at the time (ie installing DragonXia kernel over LOS14) but it still seems to be charging at the old speed. Btw, does yours display "Rapidly charging" when Quick Charge is working for you (mine just says "Charging")?

asdxx said:
I just tried this with the 20170314 I had installed at the time (ie installing DragonXia kernel over LOS14) but it still seems to be charging at the old speed. Btw, does yours display "Rapidly charging" when Quick Charge is working for you (mine just says "Charging")?
Click to expand...
Click to collapse
If you have custom kernel and still charges slow then you should look at the charger cable combo. No it says always Charging and that is the case Mi5 at the moment regardless if it fast charges or not. You know that is fast with the heat and the actual gained battery percentage per minute.

georgekav33 said:
If you have custom kernel and still charges slow then you should look at the charger cable combo. No it says always Charging and that is the case Mi5 at the moment regardless if it fast charges or not. You know that is fast with the heat and the actual gained battery percentage per minute.
Click to expand...
Click to collapse
I take that back! I was getting around 1% per minute of charging which is pretty good! I think my initial test was done with it closer to full.

asdxx said:
I take that back! I was getting around 1% per minute of charging which is pretty good! I think my initial test was done with it closer to full.
Click to expand...
Click to collapse
at 50% you should see approx 80%/h using QC2.0 and DragonXia kernel.

I have tried lineage based ROMs all charge at 5V (QC 2) but I recently installed AOSP based Slimdragon ROM which does charge at 9V (QC 3)

Aeroplane Mode
QC 3.0 also works with Aeroplane Mode. Tested with Ampere.

QC not working for me...
I just came back to Lineage after trying Slim Dragons. I have the latest firmware etc, but QC still does not work. I have tried the QC 2.0 charger that came with the Mi5. It used to charge fast under MIUI and CM13. After trying Lineage and Slim dragons, I still can't get QC 2.0 or 3.0 to work.
I have tried 3 different cables, and 3 different QC chargers. If my battery is under 90%, I will see charging rates of 1300-2000mA regardless of using a QC 2.0 or 3.0 charger, or Airplane mode. Once I hit 90%, the rate slows to 500mA or so (using Ampere).
Can someone offer a solution?

georgekav33 said:
at 50% you should see approx 80%/h using QC2.0 and DragonXia kernel.
Click to expand...
Click to collapse
What mA do you see in Ampere when QC2.0 is working?

Related

USB fast charging (kernel)

Some kernels come with USB fast charging as an option that you can toggle. If you use this, does it shorten the battery health long-term ? I'm not referring to turbo chargers (aftermarket), this is just the kernel setting. I recall reading this awhile ago, but I was curious myself.
mikeprius said:
Some kernels come with USB fast charging as an option that you can toggle. If you use this, does it shorten the battery health long-term ? I'm not referring to turbo chargers (aftermarket), this is just the kernel setting. I recall reading this awhile ago, but I was curious myself.
Click to expand...
Click to collapse
all it does is increase the voltage coming in when charging via a USB. USB charging voltage is about a quarter/third that of a wall charger. no, no negative affects.
Not at all, even with USB fast charge on it will draw less power than if it were plugged in a regular wall charger or the turbo charger. There's an app called Ampere you can use to monitor how much power the phone draws while charging (or even discharging) you can use it to see the differences between regular usb, fast charge usb, turbo charge, etc.
Ok, that's good to know. Now I can re-toggle the feature and not worry.:good:
What about if it is toggled on and you put it on a regular charger ? Is it still fine ?
mikeprius said:
What about if it is toggled on and you put it on a regular charger ? Is it still fine ?
Click to expand...
Click to collapse
if its on and you charge it in a wall outlet, nothing will happen. it will only work on a real USB connection.
Motorola put in support for the Qualcomm rapid charge in the nexus 6.
Read up:
https://www.qualcomm.com/products/snapdragon/quick-charge
It allows the battery to charge at a higher voltage with USB connections and Qualcomm certified rapid chargers AND a compatible cable. The nexus 6 can still recharge with standard chargers and cables, just at a slower rate regardless of kernel support.
To answer the damage questions: Moto says no damage to the battery as long as certified chargers are used.
Can't you use any standard usb charging cable? (Assuming it's not really long or poor quality)

Charging Issue: Charging Slowly from USB, Charging Normal from Wireless Qi

Hi everyone, so my issue I currently have with my Nexus 6 is as follows:
Device Details: Nexus 6, rooted, running CM13, Xposed Framework installed
Charging from USB: shows "charging slowly" message on lockscreen. Ampere shows an average of about 200mA, regardless of type of charger. Tried several QuickCharger adapters and a regular adapter, as well as several different cables to the same result. When connecting to a PC via USB, it shows the same charging power, however my laptop is not recognizing that the device has been plugged in.
Charging Wirelessly: charges normal as it always had, showing a average of about 500-700mA.
The issue occurred suddenly while I was out hiking and attempting to charge via a QuickCharge capable portable battery. The previous day it was charging as it always has.
All signs point to a damaged micro USB port on my Nexus 6, but wondering if there could be any other possible causes. I'm hesitant to try a factory reset to troubleshoot it as a software issue since I have no way of connecting it to my PC to re-root and re-flash CM if that doesn't fix the issue.
If it is the micro USB port as I think, any suggestions on how to remedy this? I'm used to using my device heavily everyday and charging it with a QuickCharger as needed, so this slow charging is a significant issue right now.
Thanks for any help!
your phone charges at differing speeds at differing parts of its charging cycle. and on top of that, charging via usb instead of wall charger will carge your phone at a much slower rate. that said, we also have a "usb fastcharge" option included in many kernels/custom roms. but you also have to know that fastcharge doesnt work with every usb port that you can plug into. it only will work with certain usb ports.
simms22 said:
your phone charges at differing speeds at differing parts of its charging cycle. and on top of that, charging via usb instead of wall charger will carge your phone at a much slower rate. that said, we also have a "usb fastcharge" option included in many kernels/custom roms. but you also have to know that fastcharge doesnt work with every usb port that you can plug into. it only will work with certain usb ports.
Click to expand...
Click to collapse
Sorry, I should have been more clear. When I said "Charging via USB" I just mean through the phone's microUSB port. Regardless of whether it was plugged into a wall charger(with or without QuickCharge 2.0) or my laptop or a portable battery, or a QuickCharge car charger, I was getting the same charge rate and message showing "charging slowly", much slower than wireless charge rate which showed the normal "charging" message. The Qualcomm QuickCharge 2.0 using the provided Motorola Supercharger or my QuickCharge 2.0 capable portable battery has always worked great prior to this issue.
mrkb510 said:
Sorry, I should have been more clear. When I said "Charging via USB" I just mean through the phone's microUSB port. Regardless of whether it was plugged into a wall charger(with or without QuickCharge 2.0) or my laptop or a portable battery, or a QuickCharge car charger, I was getting the same charge rate and message showing "charging slowly", much slower than wireless charge rate which showed the normal "charging" message. The Qualcomm QuickCharge 2.0 using the provided Motorola Supercharger or my QuickCharge 2.0 capable portable battery has always worked great prior to this issue.
Click to expand...
Click to collapse
ok, because the included "fastcharge" is only for usb charging. but regular charging still depends on where in the charging cycle you were. for example, at 92 itll charge at a much slower rate than at 50. what battery percent where you at when you noticed?
simms22 said:
ok, because the included "fastcharge" is only for usb charging. but regular charging still depends on where in the charging cycle you were. for example, at 92 itll charge at a much slower rate than at 50. what battery percent where you at when you noticed?
Click to expand...
Click to collapse
Initially very low, under 15%. Was attempting to charge with a QC2.0 portable battery, but the device was draining quicker than it was charging. When I got home, I attempted the Motorola "Turbocharger" wall charger and got the same rate. So I put it on the wireless charger, and as it charged, I kept testing the wall charger every 20% or so, getting the same slow charge rate.
The bottom line is really that the Wireless Qi charging is functioning properly as it always has, but any "plugged-in" type charging is charging at an extremely slow rate, no matter what type of charger, no matter what % the battery is at.
mrkb510 said:
Initially very low, under 15%. Was attempting to charge with a QC2.0 portable battery, but the device was draining quicker than it was charging. When I got home, I attempted the Motorola "Turbocharger" wall charger and got the same rate. So I put it on the wireless charger, and as it charged, I kept testing the wall charger every 20% or so, getting the same slow charge rate.
Click to expand...
Click to collapse
odd! it could be a software issue or just a derp. have you tried rebooting? im one of the few that i know with a broken usb on my n6. and it charges slower. it used to charge at about 2400mV, now it charges at 800mV max. now that its completely broken, i cant charge it via a usb anymore, now i charge it wirelessly, which is at about 800mV max as well. anyways, try a reboot, or reflashing your software first, before doing anything extreme.
simms22 said:
odd! it could be a software issue or just a derp. have you tried rebooting? im one of the few that i know with a broken usb on my n6. and it charges slower. it used to charge at about 2400mV, now it charges at 800mV max. now that its completely broken, i cant charge it via a usb anymore, now i charge it wirelessly, which is at about 800mV max as well. anyways, try a reboot, or reflashing your software first, before doing anything extreme.
Click to expand...
Click to collapse
Yea I've tried rebooting like 20 times lol. Also tried doing a CM nightly software update. I'll see if reflashing will do the trick. Any suggestion on reflashing from the device? I've always used Nexus Root Toolkit and did it from my PC.
If that doesn't work, guess I'm stuck with wireless charging too. Thanks for your help!
mrkb510 said:
Yea I've tried rebooting like 20 times lol. Also tried doing a CM nightly software update. I'll see if reflashing will do the trick. Any suggestion on reflashing from the device? I've always used Nexus Root Toolkit and did it from my PC.
If that doesn't work, guess I'm stuck with wireless charging too. Thanks for your help!
Click to expand...
Click to collapse
you can flash cm via twrp recovery on your phone, without a computer. oh, and my work buddies are still in shock that my n6 wirelessly charges.. they both have iphone 6s

Battery charging issue since 8.1

Having issues charging with the original charger since 8.1. When I was in beta 8.1 the charger stopped after 5 seconds same when phone off and charging it just kept rebooting to charge screen. So rolled back to 8.0 and all fine. Now have 8.1 again and the charger has stopped working again. My Nintendo switch charger charges phone fine on 8.1. So is there anything I can try to see why 8.1 has stopped orignal Nokia charger Woking ?
The Nokia charger charges the Nintendo switch fine
Same
Same with me .. Need answer from the expert
Yeah same, mine charges now and again ? and at only 1.5amps! Weird because my QC Charger ramps up to 3.0amps!
I bought the phone four days ago, TA- 1004- Global Dual SIM. Immediately updated it to 8.1. From yesterday Nokia's original charger charges the phone only at 1.5A...
What app do you use to check the charge rate?
Didusieq said:
What app do you use to check the charge rate?
Click to expand...
Click to collapse
Ampere https://play.google.com/store/apps/details?id=com.gombosdev.ampere
May be you can switOpen develop-model , then close usb debug model. maybe help you...
STUPlDidi0t said:
Having issues charging with the original charger since 8.1. When I was in beta 8.1 the charger stopped after 5 seconds same when phone off and charging it just kept rebooting to charge screen. So rolled back to 8.0 and all fine. Now have 8.1 again and the charger has stopped working again. My Nintendo switch charger charges phone fine on 8.1. So is there anything I can try to see why 8.1 has stopped orignal Nokia charger Woking ?
The Nokia charger charges the Nintendo switch fine
Click to expand...
Click to collapse
Try to close developer options in settings. Probably USB debugging could be an issue. Turn it off.
Yeah it's werid my phone charges full speed for a bit then slows down to 1.5ah
I believe Ampere is not really accurate together with QC. Used a small USB multimeter once and there you can see that the charging amperage during quick charging is not much higher then about 1.4A.
One of the characteristics of QC is that the voltage during charing is boosted. At 'peak power' the multimeter showed 12V & 1.4A, thus charging at almost 17W instead of the 'normal' 5V & 1.5A (7.5W).
Hi i am new here so forgive me
i have been checking the QC from beggining and it seems at 9V i get 7V and 1.44A and seems its a new type of battery that works this way at 4.3 volts instead of 5v at 1.79 get from other phones with a 4.2 volt battery.
changed charger with 5V 2.1A and it still went up to 1.44 .
i think the default charger is the only one to use.
i get a day and a half with fb and games seems that it doesnt get hot
SebasNL said:
I believe Ampere is not really accurate together with QC. Used a small USB multimeter once and there you can see that the charging amperage during quick charging is not much higher then about 1.4A.
One of the characteristics of QC is that the voltage during charing is boosted. At 'peak power' the multimeter showed 12V & 1.4A, thus charging at almost 17W instead of the 'normal' 5V & 1.5A (7.5W).
Click to expand...
Click to collapse
Agreed, standard charging is at 5V, QC 2 jumps up to at 9V and QC 3 jumps up to 12V but Ampere's voltage reading doesn't seem to reflect these boosted voltages.
My old Samsung S6 (from which I just upgraded to the Nokia 8) says "fast charging" when QC is active vs "cable charging" at 500mA (e.g. when plugged into a very old charger or PC) vs "charging" at other non-QC rates... I had assumed this was an Android feature that the Nokia 8 would have too, but apparently not, which is rather disappointing. Perhaps it's worth a feature request in the official Nokia.com forum for the N8?
---------- Post added at 09:53 PM ---------- Previous post was at 09:49 PM ----------
Correction: Looking at Ampere again, the voltage appears to refer to the battery, not the incoming power, it only shows the mA for that, not the voltage. So I'll log a feature request for Ampere...
UPDATE: My phone is model TA-1012, I'm currently running Android 8.1.0 with build number 00WW_4_84A_SP03 and I've noticed that the phone DOES tell me if it's quick charging, but only on the lock screen when it's showing notifications, and only as per the following sequence:
1) Directly after plugging in to any charger it says "charging"
2) If it's plugged into a QC2.0 or QC3.0 charger (and using a compatible cable) then after a while (not sure how long exactly, seems to be about 2 mins) this changes to "rapid charging"
3) After another while it changes to "charging (XX mins until full)" or "rapid charging (XX mins until full)" depending on the type of charger (and cable)
However, the phone is supposed to support QC 3.0 but the charging time estimate is always the same no matter whether I use a QC 2.0 or 3.0 charger, which suggests that it's actually a QC 2.0 device.
So i talked with Nokia support about the charging issue. They told me how to fix it...
1. Settings -> apps & notifications -> see all apps -> press the 3 dots in the up right corner -> show system -> battery protection -> storage
-> clear cache and data
2. Soft reset the phone.
How to do a soft reset: Press the Power button and Volume Up until you see "Powered by Android" on the screen. You can then release the buttons . Thats it.
its fast charging , it doesnt fast charge from 0 -100 . it works like this on nokia 8 : from 0-40 3amp , from 40-80 1.5amp , from 80-90 1amp , and decreases slowly from that.
but i have another problem , i dont have original cable and charger , my cable is anker powerline+ and my charger is xiaomi qc3 charger . my problem is that from 0-40 when its fast charging it keeps disconnecting and connecting every 10-15 sec.
BTW u can check your charge status when ur phone is locked (rapid charging = fast charging , charging = normal charging"this is from 80-100" , slow charging = somthing is wrong check ur cable or charger)

Galaxy tab s2 9.7 very Slow charging!

Hi.
My galaxy tab s2 charging very slowly. It takes about 3 days to full charge.
I allready try 15 or more chargers and cabels (including original).
I format and delete cache files
I downgrade to android 6.0.1
I replace the charging port
The only thing i don't do is to replace the battery, but the battery (when finally get charged) drain like normal.
Please help i really dont have anymore ideas.
Thank you!
I have this also. Had slow charging for months. The first time samsung fixed it and sent me a new charger. The second time i was out of warranty so i replaced the charging port myself, tried many different chargers and cables and can't figure it out. It charges really really slow.
leyvatron said:
I have this also. Had slow charging for months. The first time samsung fixed it and sent me a new charger. The second time i was out of warranty so i replaced the charging port myself, tried many different chargers and cables and can't figure it out. It charges really really slow.
Click to expand...
Click to collapse
I charge with my Moto fast charger and it seems to charge it faster than the Samsung one.
jahciple said:
I charge with my Moto fast charger and it seems to charge it faster than the Samsung one.
Click to expand...
Click to collapse
if you have slow charging issue, the tablet gives you a warning to use the original charger to charge it fast. If you don't get the notification of slow charging, then your tablet doesn't have any charging issues.
update: i replaced the charging port and the battery. but still no luck. the percentages keep dropping when my fast charger is connected
i'm out of ideas so if someone have some thoughts i'm listening.
Itamar1239 said:
update: i replaced the charging port and the battery. but still no luck. the percentages keep dropping when my fast charger is connected
i'm out of ideas so if someone have some thoughts i'm listening.
Click to expand...
Click to collapse
I wanted to call Samsung and asked them what they fixed when I sent it to them when it was on warranty.
leyvatron said:
I wanted to call Samsung and asked them what they fixed when I sent it to them when it was on warranty.
Click to expand...
Click to collapse
now the battery stops charging at 22% (it takes 1 day to charge to 22% lol)
if you call samsung please let me know what they said.
thank you.
Itamar1239 said:
now the battery stops charging at 22% (it takes 1 day to charge to 22% lol)
if you call samsung please let me know what they said.
thank you.
Click to expand...
Click to collapse
did you disconnect and reconnect the battery?
leyvatron said:
did you disconnect and reconnect the battery?
Click to expand...
Click to collapse
I did.
And like i said i even replace the battery
But still no luck.
I suspect that some chip on the motherboard is not working right, but that just guessing.
Any more ideas are more than welcome
Itamar1239 said:
I did.
And like i said i even replace the battery
But still no luck.
I suspect that some chip on the motherboard is not working right, but that just guessing.
Any more ideas are more than welcome
Click to expand...
Click to collapse
Also out of ideas myself
As I wrote on samsungboard recently;
"I have tried multiple cables*(that work fine with all other phones - Samsung S7/Galaxy tab S2 9.7/Sony etc)
I have tried multiple chargers (Samsung quick charge as well as Samsung standard and Anker 6 port charger)
Tried changing the USB mode (*#0808#)
I have tried resetting device (long press vol up/down/power)
When connecting device to PC to use Odin to downgrade it is not even seen by Windows 10 (again it only charges albeit slowly - this to me is an indication that D+/D- are not handled correctly by the PMIC sw which in my mind is the root cause of this whole issue).
"
https:// us. community.samsung.com/t5/forums/v3_1/forumtopicpage/board-id/tablets/thread-id/1961/page/5
I also see in devops bugreport-xxxx.txt cable type is 4 and wire_status 4;
<6>[16050.764777] [c1] sec-battery battery.27: sec_bat_set_property: current_cable(4), wc_status(0), wire_status(4)
<6>[16050.764884] [c0] sec-battery battery.27: sec_bat_cable_work: Start
<6>[16050.764904] [c0] sec-battery battery.27: sec_bat_cable_work: Cable is NOT Changed(4)
<6>[16050.767168] [c1] sii8240: detection restarted
<6>[16050.767187] [c1] of_sii8240_hw_reset()
<6>[16050.769768] [c1] sec_chg_get_property: slow-charging mode
Whereas in kernel/kmsg logs cable type is 1;
<6>[ 4.613200] [c6] sec_chg_get_property: Charger Cable type : 1
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luckeb said:
As I wrote on samsungboard recently;
"I have tried multiple cables*(that work fine with all other phones - Samsung S7/Galaxy tab S2 9.7/Sony etc)
I have tried multiple chargers (Samsung quick charge as well as Samsung standard and Anker 6 port charger)
Tried changing the USB mode (*#0808#)
I have tried resetting device (long press vol up/down/power)
When connecting device to PC to use Odin to downgrade it is not even seen by Windows 10 (again it only charges albeit slowly - this to me is an indication that D+/D- are not handled correctly by the PMIC sw which in my mind is the root cause of this whole issue).
"
https:// us. community.samsung.com/t5/forums/v3_1/forumtopicpage/board-id/tablets/thread-id/1961/page/5
I also see in devops bugreport-xxxx.txt cable type is 4 and wire_status 4;
<6>[16050.764777] [c1] sec-battery battery.27: sec_bat_set_property: current_cable(4), wc_status(0), wire_status(4)
<6>[16050.764884] [c0] sec-battery battery.27: sec_bat_cable_work: Start
<6>[16050.764904] [c0] sec-battery battery.27: sec_bat_cable_work: Cable is NOT Changed(4)
<6>[16050.767168] [c1] sii8240: detection restarted
<6>[16050.767187] [c1] of_sii8240_hw_reset()
<6>[16050.769768] [c1] sec_chg_get_property: slow-charging mode
Whereas in kernel/kmsg logs cable type is 1;
<6>[ 4.613200] [c6] sec_chg_get_property: Charger Cable type : 1
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Click to expand...
Click to collapse
thank for the info.
Like I said, I sent in my tablet to Samsung when it was under warranty with the original white samsung charger and they sent the tablet back with a slower charging black samsung charger. I have exchange the usb port, tried different cables and plugs, tried resetting, etc... and nothing has worked.
Keep us updated on what happens. :good:
leyvatron said:
thank for the info.
Like I said, I sent in my tablet to Samsung when it was under warranty with the original white samsung charger and they sent the tablet back with a slower charging black samsung charger. I have exchange the usb port, tried different cables and plugs, tried resetting, etc... and nothing has worked.
Keep us updated on what happens. :good:
Click to expand...
Click to collapse
Hi, Charging cable from Cambridge Soundworks Oontz angle 2 has worked for me.
hi Guys!!!!!!!! i too had the same problem stated above and i got the reason of it in youtube and here is the link of the video:
and this video tells that we need to replace the IC of the device where this problem is very common in most of samsung galaxy tab s2's
vjackaadhitya said:
hi Guys!!!!!!!! i too had the same problem stated above and i got the reason of it in youtube and here is the link of the video:
and this video tells that we need to replace the QC of the device where this problem is very common in most of samsung galaxy tab s2's
Click to expand...
Click to collapse
That's not something most people can do... successfully. These are the hardest type of ICs to replace. A precision temp controlled hot air station with the skillset to use it is required. Full ESD protocols need to followed. You can easily destroy the multilayered PCB if you don't do it right... you get one shot at it.
I have T715Y, and it's really slow to charge. The current monitor show that it only pull 0.45A. The charger itself capable of supplying more than 2A on other device.
On the tablet, I try to monitor the current internally, and it said it connect to usb powered, not ac powered, and I already tried swapping other chargers. Maybe that's why it's only pulling half amps. Tried cleaning the charging port with some isoprophil alcohol and pinset, nothing change. Maybe I need to swap the charging port, but searching it in 2021 was hard.
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@xdanubi it shouldn't use AC as batteries are only being charged by DC.
xdanubi said:
I have T715Y, and it's really slow to charge. The current monitor show that it only pull 0.45A. The charger itself capable of supplying more than 2A on other device.
On the tablet, I try to monitor the current internally, and it said it connect to usb powered, not ac powered, and I already tried swapping other chargers. Maybe that's why it's only pulling half amps. Tried cleaning the charging port with some isoprophil alcohol and pinset, nothing change. Maybe I need to swap the charging port, but searching it in 2021 was hard.
View attachment 5389291
Click to expand...
Click to collapse
If the device is in use it will likely skew the charging curve and not draw as much as with the screen off. If you turn the display on and read within a second or less while charging you can probably see what it's actually drawing screen off.
Or simply count how many seconds it takes to charge 1% or minutes to charge to 10%, etc.
If the battery capacity has dropped more than 80% of it's original capacity it's time to replace it before it fails.
Any battery swelling is a failure, replace asap.
Erratic charging can indicate a failure as well.
A sudden drop in capacity indicates a failure.
It could simply be a failed battery.
A battery will last roughly 1-3 years depending how it's used/conditions ie temperature and time it's at near 100%.
My S2 started exhibiting this problem too. Basically it won't pull more than 450 ma from the charger. I discovered that with a custom charge cable that shorts the usb lines together, I was able to get it to draw about 1.5 amps @ 5v. You can get a little more if you supply it with a little more volts (5.5 for instance).
Currently i am using a bench power suppy connected to a micro usb tail that has the dp dm lines tied together.
I have some usb c female breakouts coming from amazon today that I will solder on to my custom micro usb tail which will hopefully allow me to charge it from my 6 port vogek charger.
I agree that it most likely had an IC go bad but replacing that is a MAJOR under taking. 1.5 amps is enough that it will still get about 1 amp charge while your actively using it so theoretically it should go from 0 to 100% in 5.8 hours. Less if you power it down. Good enough!
trnexus01234 said:
My S2 started exhibiting this problem too. Basically it won't pull more than 450 ma from the charger. I discovered that with a custom charge cable that shorts the usb lines together, I was able to get it to draw about 1.5 amps @ 5v. You can get a little more if you supply it with a little more volts (5.5 for instance).
Currently i am using a bench power suppy connected to a micro usb tail that has the dp dm lines tied together.
I have some usb c female breakouts coming from amazon today that I will solder on to my custom micro usb tail which will hopefully allow me to charge it from my 6 port vogek charger.
I agree that it most likely had an IC go bad but replacing that is a MAJOR under taking. 1.5 amps is enough that it will still get about 1 amp charge while your actively using it so theoretically it should go from 0 to 100% in 5.8 hours. Less if you power it down. Good enough!
Click to expand...
Click to collapse
What is your experience so far? Does your custom cable work? If yes can you please be more specific how to construct it? There are many users with the same problem!

Note 9 Charges Faster When Fast Charge Is Disabled

I've been having a repeatable problem. I have a Note 9 that will charge faster when I disable fast charging under battery settings. I tested the load being drawn with a USB Power meter these are the results I got.
Using a USB-A to USB-C cable:
When QC is enabled:
Phone draws 0.5amp charge, 10ohms resistance at 5.02V.
When QC is disabled:
Phone draws 1.2 amps, 3.9 ohms resistance, at 5.02V
I am using the same cable, same power bank. The power bank's USB-A port is able to draw ~1.9 amps at 5V, tested using a USB Meter and Load Tester that will put the USB under 1 amp and 2 amp loads at 5V, with resistance being ~2.7 ohms without the power bank turning off. I haven't tested the power bank at 9V, I don't have a 9V load tester
When I immediately switch from QC to non QC, the results above are repeatable.
Things I Have Done So Far:
Reboot Phone
Clear Phone Cache
Reboot Into Safe Mode
Try Different Charging Cables, Blocks, including OEM parts.
Every once in a while, it will switch back to being able to QC fast charge but it is random.
If I use a Power delivery capable block charger, it will charge at ~2750mA (I dont have other numbers like amps, voltage, or resistance, I'm still waiting on a USB-C meter)
My phone's wireless charging has no problem operating at it's max capacity
Any one else have this problem? Anything else I could do before I factory reset my phone?
I posted about losing Fast Charge thru the stock cable a while back and got no answers or a fix. I have not tried turning off the option to see if it charges any faster. It takes almost 2 to 3hrs to fully charge at this point. I'll take any fix or work around at this point.
TokedUp said:
I posted about losing Fast Charge thru the stock cable a while back and got no answers or a fix. I have not tried turning off the option to see if it charges any faster. It takes almost 2 to 3hrs to fully charge at this point. I'll take any fix or work around at this point.
Click to expand...
Click to collapse
Turning off fast charge made my charging a bit better. With Fast Charge (FC) turned on, I was getting 0.5amps (gave around 400-500mA). Turning FC off, sped up my charging by 50%, charging at 1.2 amp (roughly gave me 800-1000mA; Both charges were at 5V). Im able to charge at around 1000 mA with this setup, a little less than wireless quick charge. No idea why turning it off helped.
Another workaround that brought my charging speed WAY UP, to 2500mA, was buying a Power Delivery (PD) capable block WITH A USB-C to USB-C cable. I can get normal fast charging speeds with that setup.
I cant get FC with USB-A to USB-C cables, which is frustrating as most of my charging blocks are the regular USB-A input port.
Hope this helps you. 2-3 hour charge is brutal.
What's even weirder is in my car my phone would barely charge. But since I lost FC at home, it started working in the car. So in my car I can FC but not at home. I even tried the wire I use in the car and still nothing. Idk what is going on
Is it possible that turning off QC is turning off a regulation in the software to keep the battery from overheating? With this regulation turned off that would normally be on when quickcharging, the regulation is not active, thus causing the battery to charge at a less regulated speed, causing charging to be faster? Maybe there's a QC bug currently that's hampering it's full potential? What software version are you guys currently?
I just checked QC on mine on the latest Xfinity version and no matter what charger or cable I use with the function, it is working.
It's def not a software thing. I'm on latest October patch. Samsung told me that they have seen some issue with the charging port and once it goes bad there is nothing to do but replace it. They told me to bring it in to a store for repair thru my carrier. Haven't had a chance to go.
---
Jammol said:
Is it possible that turning off QC is turning off a regulation in the software to keep the battery from overheating? With this regulation turned off that would normally be on when quickcharging, the regulation is not active, thus causing the battery to charge at a less regulated speed, causing charging to be faster? Maybe there's a QC bug currently that's hampering it's full potential? What software version are you guys currently?
I just checked QC on mine on the latest Xfinity version and no matter what charger or cable I use with the function, it is working.
Click to expand...
Click to collapse
That what I was thinking. Something is actively limiting the charge coming in. Everytime I had quick charge enabled I've been monitoring the ohms and the resistance would automatically jump to 10ohms. Then I disable QC and the resistance automatically drops to around 6 ohms.
I'm running Android Pie 9.0, Kernel version 4.9.112
TokedUp said:
It's def not a software thing. I'm on latest October patch. Samsung told me that they have seen some issue with the charging port and once it goes bad there is nothing to do but replace it. They told me to bring it in to a store for repair thru my carrier. Haven't had a chance to go.
Click to expand...
Click to collapse
Nocturncal said:
That what I was thinking. Something is actively limiting the charge coming in. Everytime I had quick charge enabled I've been monitoring the ohms and the resistance would automatically jump to 10ohms. Then I disable QC and the resistance automatically drops to around 6 ohms.
I'm running Android Pie 9.0, Kernel version 4.9.112
Click to expand...
Click to collapse
Yeah it could definitely be hardware related as well, due to each pin on a type c charging serving different purposes. There are two specific pins(I think it's two), that are responsible for enabling higher input of electricity. Couple years ago Google made comments about the cheap Amazon knock off cables and why they failed after a short while. Wouldn't surprise me if Samsung cheaped up for the cables and port on the device. I'll have to try and find the articles I read concerning the pins.
Here's a good start to understanding Type C.
https://www.allaboutcircuits.com/te...pe-c-which-pins-power-delivery-data-transfer/
Its the **** cable they supply with the phone.
I had all the same problems.
I noticed that when I turn off quick charge the phone can charge at 5v 1.7 amps. (USB doctor).
When I turn on quick charge it can only charge at 5 volts 0.40 amps.
The phone is trying to charge at 9 volts but for some reason cant so it goes into this safe mode.
I purchased a new Samsung cable it lasted for a week and developed the same problem.
A hint when it develops this problem Dex stops working.
I tried all kinds of cables. One Plus 5, and a few others. I finally got it to work again with my wifes one plus 6 cable.
Im now researching USB Type C ports and USB standard 2, 3, 3.1, 3.2
As well the quick charge tech used by Samsung. Its not Quick Charge 2. Its a proprietary standard.
So if your having problems with quick charge it could be due to your cable or your Port. Things very rarely go wrong with the charger. Also get yourself a USB Doctor. Its a big help. And only costs a few bucks.
Hope this helps somebody out there.
Right now I am trying to compare Note 9 vs Note 20 USB cable.

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