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[Q] Battery drain while using the phone connected to wall charger

Hi all, I have never experienced this kind of wierd issue with any of my past phones. When i would play games or say watch a movie on phone,( my last one was Htc One X), i would usually connect it to a charger so that the battery keeps charging slowly, and it worked with each of my past and even my gf's galaxy s4. But with XZ, the battery keeps continuously discharging. Anyone got any fix for this? With the kind of weak battery XZ has, it is a highly needed basic feature. I even tried with a 2A S4 charger, but to no effect. I even tried the modding of usb cable by shorting the data wires (the green and the white wire cut and insulated), still no improvement.
I have been using existenz v1.5.5 kk, and i can see that there is an option of fast charge in performance control. But turning it on doesnt make any change. Does the kernel not support fast-charge?Can anyone share any insights? It feels stupid to have to lay the phone down letting it to charge by itself olny to get all discharged within 3 hours.

billamin said:
Hi all, I have never experienced this kind of wierd issue with any of my past phones. When i would play games or say watch a movie on phone,( my last one was Htc One X), i would usually connect it to a charger so that the battery keeps charging slowly, and it worked with each of my past and even my gf's galaxy s4. But with XZ, the battery keeps continuously discharging. Anyone got any fix for this? With the kind of weak battery XZ has, it is a highly needed basic feature. I even tried with a 2A S4 charger, but to no effect. I even tried the modding of usb cable by shorting the data wires (the green and the white wire cut and insulated), still no improvement.
I have been using existenz v1.5.5 kk, and i can see that there is an option of fast charge in performance control. But turning it on doesnt make any change. Does the kernel not support fast-charge?Can anyone share any insights? It feels stupid to have to lay the phone down letting it to charge by itself olny to get all discharged within 3 hours.
Click to expand...
Click to collapse
Charging is really a problem for XZ. Anyways, shorting the data wires won't help, try switch to a stronger cable that's capable of transferring larger amount of electricity when you're using the 2A charger (many of those cables aren't able to transfer enough amount of electricity).
Also, when your phone is really fully loaded and became very hot, just as when you use it for navigation in your car under the sun, the charging speed will decrease (I don't even know why). The charging speed decreases either when you're touching the screen or when it's hot.
Anyways, try better cables first and see if it helps. The docking system is also likely to charge faster.

Darren_J said:
Charging is really a problem for XZ. Anyways, shorting the data wires won't help, try switch to a stronger cable that's capable of transferring larger amount of electricity when you're using the 2A charger (many of those cables aren't able to transfer enough amount of electricity).
Also, when your phone is really fully loaded and became very hot, just as when you use it for navigation in your car under the sun, the charging speed will decrease (I don't even know why). The charging speed decreases either when you're touching the screen or when it's hot.
Anyways, try better cables first and see if it helps. The docking system is also likely to charge faster.
Click to expand...
Click to collapse
I used a whole bunch of cables. The HTC one actually works as an anti-charge cable lol, it eats up battery even when the phone is left on charge unused. I had high hopes with the S4 cable, which turned out to perform same as the stock Sony one. Guess I have to live like this..

billamin said:
I used a whole bunch of cables. The HTC one actually works as an anti-charge cable lol, it eats up battery even when the phone is left on charge unused. I had high hopes with the S4 cable, which turned out to perform same as the stock Sony one. Guess I have to live like this..
Click to expand...
Click to collapse
Sorry to hear that the cables you tried all failed. Did you try using the docking system? They should perform better though.
I mentioned switching cables because I had a "anti-charge" cable before, lol. I did some research afterwards and finally got some 22AWG cables and they really made a difference. It's said that they're capable of transferring 3A electricity and it's really different from all other cables I've used. They're just about $2 each because they're handmade, I can give you one if you wanna have a try.
Also, charging by AC power should be better than using the power of cars' lighter. I'm using my docking system with the SONY stock charger w/ ac power. Never disappointed me.

Darren_J said:
Sorry to hear that the cables you tried all failed. Did you try using the docking system? They should perform better though.
I mentioned switching cables because I had a "anti-charge" cable before, lol. I did some research afterwards and finally got some 22AWG cables and they really made a difference. It's said that they're capable of transferring 3A electricity and it's really different from all other cables I've used. They're just about $2 each because they're handmade, I can give you one if you wanna have a try.
Also, charging by AC power should be better than using the power of cars' lighter. I'm using my docking system with the SONY stock charger w/ ac power. Never disappointed me.
Click to expand...
Click to collapse
Dude you might not be able to give me even if you wanted to.. I am in india and the shipment cost will be excessive. Thanks a lot btw.
I flashed Carbon KK rom and the charging is comparatively better. Atleast it doesnt drain while i use the phone for browsing etc, connected to a wall charger. But if I play games or watch videos on speaker, it does to some extent. I bought one more charger, a Nokia made 750 maH charger (AC 20N) which again is wierdly same in performance compared to both the 1.5A Sony and 2A Samsung. What I think is as you said, the wire makes all the difference. A 2A non detachable is the need of the moment for XZ it seems..

Anti-charge cable?
Xperia™ Z (C6602) with Tapatalk

From my experience usually Google Play Services is the culprit for hot phones and battery drain. What I did when on stock 4.4.2 was i uninstalled updates for the services and my battery life improved by a lot. Although it does come with the downside that some apps like youtube won't work with the older version (easy work-around by using chrome to go to youtube instead =P)

Since I own that phone, I've been facing the same problem of slow charging speed (actually discharging when using some applications)
The more problematic case in when I'm using the phone in car when driving even if I'm using a powerful car charger (Anker).
In the past I also have tested number of diffferent charger and cables (including original Sony car charger) without seeing *any* improvement.
Recently I've decided to took time to make a comparison test with a colleague Nexus 5. We have connected it in my car to the same charger and used in the exact same configuration (Waze navigation app running) for a one hour drive on the same work->home daily path where I use usually my Xperia.
The measured results have shown for the Nexus a 30%/hour increase of battery level opposed to the Xperia 10%/hour decrease I'm facing every other day.
Later, using "Android tuner" application battery monitoring tools, I've been able to measure that, even when using a 2.2 Amp capable charger, the Xperia isn't able to "suck" more that 700/800mAmp input current most of the time.
To go further I've asked in the french forum where I've posted those figures if any people had been successful to have the Xperia battery level increasing in the same configuration. I have got only answers of other people acknowledging having the same problem as myself.
Then I've also asked people in the "accessories" section of a car owners (Toyota) vehicle forum: found people having the same issue are also owning Sony models.
Also asked another colleague who who owns a Xperia model Z1: ditto.
I definitively start to think that there is a defect is a in the battery charging regulation system of the whole Xperia range.
BTW: I will be very interested if anyone using an Xperia Z in car with navigation application running without those issues could post details about his charger brand and model, and how much battery percent/hour increase he his actually getting with that setup.
Sorry for the long message and thanks for your attention

Force slow (500mA) charging

Hey folks,
you are reading right: For a certain reason* (if you care, pls scroll down) I need to "limit" the charging current to something like 500mA.
I am running stock rom (20c, rooted) but if there are solutions for custom roms / kernels I'd give it a try.
1st thought: The phone has an inbuilt "Thermal Protect" which can be disabled via hidden menu. It seems that the file (/sys/devices/platform/lge-battery/power_supply/battery/temp_control) only accepts the values "164" and "0". I'm looking for a way to actualy lower the temperature to trick the phone into thinking "wow, battery is too hot, I'll better charge slowly"
There are also a bunch of temp throttling files in /d/tegra_thermal, but as I unterstood they do only throttle the tegra chip which I don't want.
2nd thought: I've read articles about building special cables where the usb data ports are short wired, which then is interpreted by the phone as "charge only" and draws as much current as possible. I'd need it other way round and tried to just physically block the data ports but no success.
Why am I trying this? I bought a lamp for my bicycle which has a small (150mA) battery and a usb-out. The dynamo (generator) will charge the (inbuilt) battery like up to 40%, then the lamp will activate the usb port. The phone will then charge quickly (~1A) until the battery inside the lamp will go below the threshold, and the usb port will be deactivated.. and it starts all over. I'm ending up with a few hundred charging connections/disconnections a day of cycling with actually pretty few breaks. Thanks to snoozy it's not that bad.. but it still sucks.
Any ideas appreciated, hardware and software vise.
Regards, kugelz

I guess you mean 150mAh battery.
It's interesting how you say the phone gets about 1A during charging. How do you know that? One would think this kind of USB port (driven by a small battery and a dynamo) would provide max the standard 500mA (which is the slow charging you want).
Anyway, you could try the cheapest sh*tiest USB cable you can find, since the reason for being cheap is having a thin cable, and a thin cable means less current can flow.

Iodak
You are right, 150mAh is what I meant.
Someone created a diagramm for serveral similar devices (speed / power) and for speeds > 15km/h the current is about 800mA.
I flashed iodak kernel as it has the fast charge mod, but unfortunately in the latest ready-to-flash iodak kernel (v10) there is not the latest fast_charge mod included (where you can actually specify the current) but an older version where you can only switch it on or off

MI5 Lineage OS 14.1 QC 3.0 tests and findings

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.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
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?

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
Skickat från min BLA-L29 via Tapatalk
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
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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
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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!
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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!

Question Fast Charging (Slow) Problem

Hi, i have Redmi Note 10 Pro (sweet) and from 3/4 days i have facing fast charging (phone says fast charging) slow, 3 hours for charge fully and if i check with battery guru says max 5w output, official xiaomi charger and tried also with baseus 120w charger, before works well fast charging, any suggestion? other with this problem? Unlocked with latest twrp from nebrassy and MIUI Rog edition with delta kernel

Can you confirm that the phone is actually taking 3 hours to charge? Or is it just saying 3 hours until full? My phone was also showing 3 Hours Until Full but in actuality was not taking that long.

Take me about 45 minutes from 30% to 90%, it should be about 1h30m for 0 to 100%

try changing the orientation of usb-c connector on either or both charger and phone connection end and see.
I have no problems charging close to 33W with Xiaomi included charger or my Baseus 65W GAN charger which supports 33W profile. I charge at around 75%/hr

Looks like a problem with twrp /
Go to the concerned forum with this question
If you have Magisk / Super user, they have modules to enable fast charging
Probable cause might be your charger cannot detect the charging profiles supported by your phone. For precaution it uses the slowest profile.
Also you may check with the kernal. Sometimes they purposefully disable fast charging.

JvLTech said:
Looks like a problem with twrp /
Go to the concerned forum with this question
If you have Magisk / Super user, they have modules to enable fast charging
Probable cause might be your charger cannot detect the charging profiles supported by your phone. For precaution it uses the slowest profile.
Also you may check with the kernal. Sometimes they purposefully disable fast charging.
Click to expand...
Click to collapse
I flash a known good rom as charging issues are hard to troubleshoot... reduce the variables.
Or trouble shot the current firmware if you are capable of doing so. The wrong value could cause hardware damage.
Could also be a sign a hardware fault condition exists.
Inspect port with a good light and magnification for any signs of damage. Clean if any debris or dust is present.
Use a known good OEM charger and cable. That means exactly what it says. It's also how I ended up with 2 Samsung bricks/cables
A friend or repair shop might let you use theirs.

Did not root my last two phones anymore. To much problems ;-)
Camera Api2 is activated by default on the 10 pro. So bootloader unlocking also not needed.

JvLTech said:
Looks like a problem with twrp /
Go to the concerned forum with this question
If you have Magisk / Super user, they have modules to enable fast charging
Probable cause might be your charger cannot detect the charging profiles supported by your phone. For precaution it uses the slowest profile.
Also you may check with the kernal. Sometimes they purposefully disable fast charging.
Click to expand...
Click to collapse
Can you link any module? The ones by Laptapper change what it displays, but don't actually change anything sadly.