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Issue when connected to computer! Help!

Yesterday I've received my Tab S2 8.0". After the first charge I connected the tablet to my computer to upload some files and I get a red "X" on the battery and the message: "Slow charger connected"
In the notification area I get a constant red "Device charging slowly. To charge faster, use the original charger".
Is this normal? Cause I'm using the USB cable that came with the device and tried with USB3.0 and USB2.0 with the same results.
Oh, extra info! The tablet was bought in France, I'm from Argentina.

XinsaX said:
Yesterday I've received my Tab S2 8.0". After the first charge I connected the tablet to my computer to upload some files and I get a red "X" on the battery and the message: "Slow charger connected"
In the notification area I get a constant red "Device charging slowly. To charge faster, use the original charger".
Is this normal? Cause I'm using the USB cable that came with the device and tried with USB3.0 and USB2.0 with the same results.
Oh, extra info! The tablet was bought in France, I'm from Argentina.
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Yes it's normal.
USB ports cannot put out as much current as a decent charger (like the one the tablet came with). Hence it charges more slowly using USB (or indeed some inferior or lower powered plug-in chargers), and it's warning you that it is doing so. I think the maximum a USB2 port can provide is about 500mA, with USB3 about 900mA or so.
Compare that to the proper plug-in charger, which is 2A (if I remember correctly).
Some motherboards etc do have higher current USB ports for charging etc, but that's non-standard and they are usually specially labelled as such.

Oh, thanks for the help. I got a little scare with the warning.

I got the same tablet, and also noticed this warning about battery charing slowly, and asking me to use original charger.
It's working resonably ok with original charger, though it charges slow with other chargers with the same AMP rating. E.g. it charges slowly with the larger iPad charger, which is also 2 AMP rated ...
Charing with iPad charger is so slow, that when I use the device with during charging, it drains faster than it charges! Quick unusual ...
Anyone? Any comments?

Theres an excellent app called Ampere which gives you info on the tablets charging and power consumption - useful and interesting.
Cant post links yet so just search for it on Play

Also don't forget that (when not built-into the charger) the cable is also important to the amount of current reaching the tablet.
The best charger in the world may well struggle if a long cable with hair-thin high resistance wiring is used to transfer the power into the tablet.
Lastly even though many chargers are labelled as 5v 2A, they may not actually be able to provide that under load, and if things drop when a hungry device like a tablet is connected then things will slow up.
I have a few 5v 2A chargers which come up as slow charging, whereas others which were more purposefully designed (e.g. the 5v 2A charger from my old Nexus 7) work just as well as the supplied Samsung one.

DarrenHill said:
Also don't forget that (when not built-into the charger) the cable is also important to the amount of current reaching the tablet.
The best charger in the world may well struggle if a long cable with hair-thin high resistance wiring is used to transfer the power into the tablet.
Lastly even though many chargers are labelled as 5v 2A, they may not actually be able to provide that under load, and if things drop when a hungry device like a tablet is connected then things will slow up.
I have a few 5v 2A chargers which come up as slow charging, whereas others which were more purposefully designed (e.g. the 5v 2A charger from my old Nexus 7) work just as well as the supplied Samsung one.
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this is such onfortunate ongoing issue
i got my Tab S2 - SM-T715Y in Thailand as i am backpacking Asia ..
I know the warranty is per country .. so I can not use it where I am now - in Vietnam .. or back home in USA
I realized that this was a major factor before buying .. so I can go through my credit cards extended warranty ..
in the future I will buy Acer or Asus or alike that have international warranty ..
yesterday I was on a road trip
and I was using my 12V car charger
and then a battery bank .. and I think it rigered this problem or fact that I drained my S2 to 0%
fact is that now it is showing "slow charger connected" .. I am using the original charger and cable
now it is slowly *discharging* when connected to AC!!
also will try to whipe the cache..
this is so terrible
I am losing faith in Samsung :/ (had charging issues with my Note 3 .. 8 months in .. motherboard issue)
I can not find a solution to this problem
I am thinking of putting it in a refrigirator? maybe it will do something to the battery?

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.
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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.
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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?
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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.
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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.
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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!
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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

about turbo charge, the strange charging state

I just bought a Nexus 6, and one thing is strange to me.
When charging with the turbo charger and the cable come with phone, phone shows charging and back to not charging state, repeatedly about 3 minutes, finally stop the repeat and keep showing charging state like regular charging.
I never use turbo charge before, so I don't know it's normal or not.

Since Qualcomm's Quick Charge 2.0 (your 'turbo charge') has the ability to charge devices at higher voltages and amperages ([email protected], [email protected], and [email protected]) than normal USB allows, it is probably negotiating between the device and the Quick Charge charger at what voltage/amperage it should start charging at - once it settles on that, it starts normal charging. As the battery gets charged, the charger reduces voltage and amperage. As a side note, the Nexus charger can also be used as a normal USB charger - it only shifts to the higher values when a proper successful negotiation happens between the device and the Quick Charge charger.

battery charge rate question

My Nokia 8 shows charging on the lock screen and after few minutes it shows the time left to fully charge.
Just then I noticed my phone was on 19% and lock screen was on when I plugged in the charger. On the lock screen above the fingerprint icon it read charging rapidly and then it changed to charging slowly and went back and forth a couple of times, then went just said charging. I can replicate it 100%. Does what it says on the screen really mean it was charging slow and fast and fluctuating in between it?
Phone running oreo beta latest and using stock cable and charger that was supplied. Ampere shows 2910m.
What do you guys make of it.
From 19% to full charge the lock screen shows 3hours. Is that right for Quick Charge?
TIA

I have exactly the same experience with the supplied charger and other QC 3.0 chargers. I tested all the chargers in my house and found my old QC 2.0 Samsung charger is able to constantly rapid charge the phone. I have not yet been able to test of it is actually faster, will update when my battery runs out.

The same here.
I have a QC 3.0 certified charger and it is not showing fast or rapid charge. Looks like there is some issue with Nokia. It was exactly the same using Nougat.

Was able to do further testing and it seems the phone is quick charging with the supplied charger, or any other QC 3.0 charger. The supplied charger was 20 minutes quicker than my old Samsung QC 2.0 charger.
There definitely is a bug in correctly displaying charging rate when connected to QC 3.0 chargers. Also the charging estimates are about twice as high as they should be. The phone can fully charge around an hour and a half, but estimate states three plus hours.
Looks like a couple other people have noticed this issue on the Nokia support forums.

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.
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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.

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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.
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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.
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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
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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.