Database Develop

[Q] Faster USB Charging?

Just reading up on USB chargers, and I found somewhere in a thread here about phones defaulting to smaller ma when charging via USB if the connector didn't have the data pins shorted or something.
So, I was wondering a couple of things:
1) If the default charger supplies 700ma, do you think that is the most the Nexus S can draw? Does anyone have one of these shorted USB chargers? Does it charge the NS faster?
2) If it does charge faster, how hard would it be to do something similar to shorting the data connections? I have a generic AC-USB cable which I currently use for my iPod touch.
3) Is there a way to check if it is already shorted out? The USB charging port looks similar to ones on my computer, but I'm not sure what to look for.
Thanks for any help! Maybe if we can sort out this stuff, we can provide a solution for those looking for faster charging!

it does work safely, i'm using a 1000 mAh charger at home, and a 2000 mAh charger in the car both are from aftermarket eBay/DealExtreme charges.
no overheating
and charges faster than stock

AllGamer said:
it does work safely, i'm using a 1000 mAh charger at home, and a 2000 mAh charger in the car both are from aftermarket eBay/DealExtreme charges.
no overheating
and charges faster than stock
Click to expand...
Click to collapse
Ok thankyou for that AllGamer, I'll think of possible ways I could mod the charger now

The only reason it is slow is because of the USB charging brick instead of just a charger.
Sent from my Nexus S using XDA App

I know it's a wrong thread, but anyone has any pointers as to how to short a regular USB cable to make the phone think it's a power adapter cable?

XBOHDPuKC said:
I know it's a wrong thread, but anyone has any pointers as to how to short a regular USB cable to make the phone think it's a power adapter cable?
Click to expand...
Click to collapse
Nah it's not the wrong thread that was one of my questions! I'm not sure exactly where you would do it, but maybe if you skinned the wire, then cut the data lines it would work?
Not sure which end you would do it on however, but that may not matter. Any other ideas?

The two center pins in the USB carry the data. If you pull them out, the cable won't be able to connect to the computer.
Sent from my Nexus S

Wow - you don't need to do this and you wouldn't want to in a computer anyway.
The USB specification says that 500ma (@ 5v) of current should be available from a computer's USB port. Of course, the actual wires can carry much more than this, so manufacturers can tell their phones to takes as much current as is offered.
Almost all computers limit their USB power output accordingly - this is why some opld usb-powered external hard drives needed 2 USB plugs to get enough power. The only computers that I am SURE emit significantly more than 500ma on their USB ports are first and second generation MacBook Airs.
Some phones, the N1 and every other HTC specifically, look for a specially shorted cable to "know if they are plugged into the wall adaptor" as opposed to a computer USB port. In reality, this is just a way to make you specifically buy HTC chargers as opposed to third-party off-brands, because plugging one of these phones into an off brand charger will limit the current draw to about 450ma.
If you want to know if your Android phone thinks that it is in "USB" mode or in "AC" mode, just plug the phone in, open the dialer, enter *#*#4636#*#* and then select battery info. If your phone is one that cares (not all do), it will say USB if it thinks it should be in USB charging mode, or AC if it thinks it should be in AC charging mode.
I would not try shorting out the middle pins in a cable and then plugging it into the computer. First, most will probably just disable the USB port completely, shutting off even power you could draw. Second, if it doesn't shut down, you run the risk that a badly-built USB port might not properly limit the current to 500ma - and since they are not designed to furnish more current than that, you might melt something expensive or start a fire. third, if you make a mistake, you risk shorting out either your phone or your computer, which might ruin your day, week or month, depending on your financial means to replace the system that cooks itself.
I would just run out to your local store, pay 15 bucks for a 2A third-party usb charger brick, and go to town. That will work perfectly - this is what I use, and it probably cuts the charge time by 30-40%. Obviously, this indicates that the NS is not capable of drawing a full 2A - I have not put a meter on it, but I would bet that it limits itself to somewhere just under an amp in.

I have recently bought both a 2A wall charger and car charger and my phone does not recognise either of these as anything more than a 500mA source.
Is it really just a case of opening the car charger up and shorting out pins 2 & 3? they are currently not connected to anything in the charger.

If it's indeed a matter of shorting the data lines, then I think you can skin the wire as suggested by others, but then cut the data lines, short the end that leads to the phone, leave the end to the computer open. I think it's the phone that tries to determine whether the data lines are shorted.
Edit: Can someone measure the continuity between the data pins with the stock charger? I wonder if they are shorted. I'm still waiting for my Nexus S to arrive, so can't test it.

Yup, the data lines in the stock Nexus S charger ARE shorted.
I just modified a cheap 1A car charger by popping it open, soldering the 2 data lines together and putting it back.
The report on the Nexus S before I did this (*#*#4636#*#*) said "USB", and afterwards it now says "AC".
I will report back after I make a road trip if this improves the GPS + Pandora + Screen in car situation. I suspect it will.
----------------
Yup, the car charger seemed to actually maintain and increase the battery this time. Seems good.

The NS supports chargers output to a max of 1000mA, as it says on the back of it, where the battery resides.

[Q] Recharge via Computer USB Port?

I got the 16GB Touchpad few days ago and since i got the one with an american charger i cant charge it yet (till i get the traveler kit).
My actual problem is that it doesn't charge through the USB port too. I left it for like 24-30 hours charging through the USB port (with the cable that came with the touchpad) and when i try to turn it on, it shows me an icon of an empty battery.
Is my usb cable problematic or it just that the touchpad cant charge through the usb port from a PC?
ps: every time i plug the usb it get a message telling "to reliably charge please use the charger and cable that came with this device"

I have the same issue with a 32 GB one. I received it brand new, factory sealed today and it is going back to HP. I called HP, the cable is fine, works with my HTC phone, it's the USB port on the Touchpad, it's loose and losses connection. HP is sending a box with prepaid shipping label and doing a warranty repair.
I really love the Touchpad and I am a bit disappointed with receiving a new device with a loose USB port. HP has great support and I can't wait until I get it back.
Sent from my HTC Sensation 4G using Tapatalk

Unfortunately thats not an option for me (returning it to touchpad), since i bought it from Ebay (thats the only way possible for me to buy a touchpad from my country).
You had the same issue with the charger plugged in the usb cable as well?

What sort of power source do you use, if not the charger.
I've tried to use a computer, but it does not look like it's charging, but data transfer work.
I tried with an iphone charger, that sort of work. It complains about not getting enough power (iphone charger is 5,0V while the hp charger is 5,2V)
Bottom line. Use the original charger, just buy an us adapter. It works great.
There is another thread here sonewere discussing chargers for non US owners.
Sent from my M9 using Tapatalk

Jon (aka nle) said:
What sort of power source do you use, if not the charger.
I've tried to use a computer, but it does not look like it's charging, but data transfer work.
I tried with an iphone charger, that sort of work. It complains about not getting enough power (iphone charger is 5,0V while the hp charger is 5,2V)
Bottom line. Use the original charger, just buy an us adapter. It works great.
There is another thread here sonewere discussing chargers for non US owners.
Sent from my M9 using Tapatalk
Click to expand...
Click to collapse
Im trying to charge it through my PC using the original cable that was in the box (tried it in a USB 2.0 port) and im getting the 'try a reliable recharging source like the USB cable and the charger that came with your touchpad'.
I also tried charging it with a 5.0V 200mA phone charger but it didnt work either.
Shouldnt it charge even a bit with the cable? im trying to charge it for 2 days now

Varemenos said:
Unfortunately thats not an option for me (returning it to touchpad), since i bought it from Ebay (thats the only way possible for me to buy a touchpad from my country).
You had the same issue with the charger plugged in the usb cable as well?
Click to expand...
Click to collapse
Yes, tried the wall charger, then pc, a different usb cable, all had the same result. When I plugged in I could feel the USB port loose in the Touchpad itself, it had a bit of play and if I played gently on it, it would begin to charge or connect to the pc. When i let go, it disconnected from my pc and then gave me the charging error message. I purchased mine from an e bay store and it has a warranty for 1 year.
I would be happy to help you with yours, if you want to ship it to the US, it has a warranty from the factory. Pm me if you'd like help. I am certain that shipping to and.from US could be costly but I am willing to help.
Sent from my HTC Sensation 4G using Tapatalk

Mine will only will charge from official HP chargers. This is much like my old iPhone 3g before all the generic manufacturers caught up. I suspect that the voltage and amp requirements are tighter than the USB specification, so it will be a crap shoot if you use non HP chargers.
With that said, HP has 30% off all touchpad accessories right now. Combine it with the cupon SAVE15HP
-W
Sent from my I897 using XDA App

wpp105 said:
With that said, HP has 30% off all touchpad accessories right now. Combine it with the cupon SAVE15HP
Click to expand...
Click to collapse
Ya unfortunatelly i could order anything since i dont live in the US/UK regions

Varemenos said:
Ya unfortunatelly i could order anything since i dont live in the US/UK regions
Click to expand...
Click to collapse
Don't worry over that, I can get what you need and ship it to you.
Also, in speaking to HP, any USB charger in the US works, they're considered universal.
Sent from my HTC Sensation 4G using Tapatalk

you cant charge the touchpad using a computers usb ports. it doesnt draw enough power. the voltage of the charger doesnt really matter, it needs at least 2 amps or it wont charge the touchpad. cell phone chargers usually only draw 1 amp or less and usb ports only .5 amps.

cachookaman said:
you cant charge the touchpad using a computers usb ports. it doesnt draw enough power. the voltage of the charger doesnt really matter, it needs at least 2 amps or it wont charge the touchpad. cell phone chargers usually only draw 1 amp or less and usb ports only .5 amps.
Click to expand...
Click to collapse
That is absolutely not the case.
I have only charged mine once with the AC-USB thing and I have been using it since I got it the first day of the sale. I use mine all day long and only charge it occasionally via USB to PC connection. I use the original cable from HP and another one from my Samsung Mythic (work and home).
The message that you get when you plug it in is misleading but normal on a stock TP. However there is a patch in PreWare that changes it to just default to charge and not bug you. Anyone who intends to use this thing at all with WebOS needs to get PreWare installed. In fact, some time spent at precentral.net would benefit any new owners. You will learn A LOT more about these little jewels. I spent a few hours reading stickies and interesting threads and learned a great deal.
If it is really plugged in (and you will know because your PC will tell you) and you get no charge, you have a problem. It should charge on or off while plugged in - mine does.

nunjabusiness said:
That is absolutely not the case.
I have only charged mine once with the AC-USB thing and I have been using it since I got it the first day of the sale. I use mine all day long and only charge it occasionally via USB to PC connection. I use the original cable from HP and another one from my Samsung Mythic (work and home).
The message that you get when you plug it in is misleading but normal on a stock TP. However there is a patch in PreWare that changes it to just default to charge and not bug you. Anyone who intends to use this thing at all with WebOS needs to get PreWare installed. In fact, some time spent at precentral.net would benefit any new owners. You will learn A LOT more about these little jewels. I spent a few hours reading stickies and interesting threads and learned a great deal.
If it is really plugged in (and you will know because your PC will tell you) and you get no charge, you have a problem. It should charge on or off while plugged in - mine does.
Click to expand...
Click to collapse
The problem is, its plugged, i get the warning but its not charging at all (while the touchpad is turned out cause its out of battery the past 2 days).

Varemenos said:
The problem is, its plugged, i get the warning but its not charging at all (while the touchpad is turned out cause its out of battery the past 2 days).
Click to expand...
Click to collapse
Now to be completely honest - the first charge I made out of the box was with the AC adapter and I left it in overnight like I had been told.
But since then I have never used the AC plug and I have let it get down to about 20% or so but no lower.
It very well may be that from a DEAD state, it requires the extra amps to jump start it, but as long as you have that initial charge it is covered by the lower amperage of the direct USB-to-PC connection. I'm guessing it came with a fair charge and you burned through it without ever plugging it in to the USB.
Bear in mind that not ALL USB ports on a PC are powered the same either. Older USB 1.0 and 1.1 are crap for power. Front or top-mount ones also may not have as much juice as the ones in the back directly off the motherboard. Look at portable hard drives, some come with a double-header cable to use two low-powered ports. I know my top-mount ones will not power my 1TB 2.5-inch drive, but the ones in the back do.
However, I am really surprised you can't pick up a standard plug in USB adapter for your country for a few dollars (equivalent) for wall. Jeez they sell them at the dollar stores here now. I don't know if a car adapter would output enough to do it but that is another idea. If you can get one, you should be able to bring it back easily enough. The 2 amp adapter does charge a lot faster.
---------- Post added at 11:15 PM ---------- Previous post was at 10:53 PM ----------
LOL, I am really in a rare mood as this question has bugged me a little. So I decided to find some straight poop. Here is the best description I have seen anywhere.
http://www.maxim-ic.com/app-notes/index.mvp/id/3241
If you don't want to read it, the gist (as I understand it) is:
At 5V, the USB ports in a PC have to be able to source (provide) at least 500 mA (.5 AMP). However, depending on how your motherboard is provisioned (MOSFETs and diodes) that is limited/controlled.
The spec though, does allow as much as 5A to be provided. In fact, 2A is not uncommon if the other ports are not loaded.
So you could try unplugging all your other USB stuff or try another computer's USB ports.

Varemenos said:
Im trying to charge it through my PC using the original cable that was in the box (tried it in a USB 2.0 port) and im getting the 'try a reliable recharging source like the USB cable and the charger that came with your touchpad'.
I also tried charging it with a 5.0V 200mA phone charger but it didnt work either.
Shouldnt it charge even a bit with the cable? im trying to charge it for 2 days now
Click to expand...
Click to collapse
Given that the HP charger has a 2A output, odds are that anything much below around 500mA isn't going to charge the device, or at least not at a rate that'll offset the drain while it's running.
The USB ports on laptops often won't supply enough current, particularly if there's other devices on the same bus. If you plug it into a powered USB hub then you should be in business as they should supply more like around 1A generally.

My Touchpad charges from my laptop USB port, however it is slow. I am getting about 8 - 10% charge per hour. The screen needs to be off though, otherwise there is no noticable charging happening.

Mine is not charging with USB laptop at all. Need to use wall charger

I have XRON VB2.8 on my two touchpads and both show battery charging symbol when they are connected to computer via USB and yes the they charge very slow.

FYI, can't remember if WebOS / Govnah tells you what the current amps being used is, but if you are on Android tools like Elixir 2 tell you how many amps you are either discharging (-) or charging (+). So depending on what you are using (wifi, bluetooth, # of widgets, running applications, screen brightness, overclocking, underclocking, etc.) YMMV on whether or not you can charge via usb connected to your computer.
So if you are discharging at a rate of -750 mA connecting to a usb port on your computer will still have you discharging at a rate of -250:
Code:
[COLOR="Red"]-750 mA[/COLOR] + 500 mA = [COLOR="Red"]-250 mA[/COLOR]

mine charges in the usb port, but only if I turn off the screen or turn off the touchpad completely. my ports only provide 500mA, and with the screen off, the touchpad draws about 50mA, so it can charge at about 450mA. With the screen on, it draws about 760mA, so even when it's plugged in the USB, it is discharging at a rate of about (760-500=260mA).

How can recharge batterry from USB link with PC

Hi!
Due to the batterry time not ling enough, some time I am on the trip with PC. But the GS7.7 is not support to recharge batterry via USB link. Who have the Idea or soft support GS 7.7 recharge batterry via USB please?
Thanks

phuong said:
Hi!
Due to the batterry time not ling enough, some time I am on the trip with PC. But the GS7.7 is not support to recharge batterry via USB link. Who have the Idea or soft support GS 7.7 recharge batterry via USB please?
Thanks
Click to expand...
Click to collapse
I don't know , but I think even if you were able to charge via usb it will took very long time in order to full charge it because capacity of battery is big

Need to make your self a universal usb charging adapter,look it up on here.
Works and been tested with 7.7 aswell!
You need to solder resisters 33k and 10K To the data and power lines...
Look for it in 10.1 forum
How to make your own universal charger for galaxy tab.

MRBR7 said:
Need to make your self a universal usb charging adapter,look it up on here.
Works and been tested with 7.7 aswell!
You need to solder resisters 33k and 10K To the data and power lines...
Look for it in 10.1 forum
How to make your own universal charger for galaxy tab.
Click to expand...
Click to collapse
Do you mean D+ and D- lines of USB need to be pulled up ? and which D line should have 33k or 10k ?

Link please .

yes thats the one..
(make sure you join the resistors to each other at the middle aswell.)
Look at the resisters you use and make sure they are both facing the same direction.My first attempt to do it failed and at first i thought it didnt work on 7.7
Then i noticed one resister was back to front.not 100 percent sure if this was the problem but after i changed this from looking at pictures online and comparing the pics to my resisters i noticed what end the 2 colored bands are at.the 33k one with the gold bands and the 10k one with dual black bands.
The end of the restister with the gold bands(33k) and Black bands(10k)
is the end that the power joins to.
The other end of the resister should have matching bands on 10k and 33k.
this is the end that joins to the data line.

phuong said:
Hi!
Due to the batterry time not ling enough, some time I am on the trip with PC. But the GS7.7 is not support to recharge batterry via USB link. Who have the Idea or soft support GS 7.7 recharge batterry via USB please?
Thanks
Click to expand...
Click to collapse
once i left my turned-off 7.7 connected to my running PC for few hours, to my surprise the battery seems to be charged-up during that time

yup... its still charging... but slowly...

Actually you could get faster charging with that USB data cable when the PC has been installed with the proper drivers. The standard downstream port could deliver up to 500mA ONLY after the USB hub has negotiated power draws with the host interface. Otherwise the port might just deliver less that 100mA power.
Kies provides the suitable driver. You may uninstall Kies afterward and keep the driver installed.
In addition, PCs have two kinds of USB port — standard downstream port and charging downstream port. Some older PC would label them 'SDP' and 'CDP', but I found that most modern PCs don't distinguish them at all. As you might imagine, you could get faster charging plugging into a CDP than into a SDP.
FYI., those ports used in wall charger is the third kind of USB port, CP - Charging Port.

Hi!
After installed the Battery HD soft, when link with PC, That programe showing the charging time and progress charge. but still not sure.

I am charging via USB as we speak.
I am doing it using a standard mincroUSB cable (that I use to charge my GNote and SGS2) and added an adapter I got on eBay for my SGT10.1
You can pick one up here: http://goo.gl/EMzpJ
It's not as efficient as the AC charger but it's doing a good job and will get you by if you haven't got access to a power point.

Can use this hub to charge as well
This SIIG INC - SYNC/CHARGING HUB AND READER FOR GALAXY TABLETS - CE-H21112-S1 gives you the capability to charge your Tab through a computer USB port. Seems to work pretty good used it last night. Checked the net prices vary per vendor.

Franwella said:
I am charging via USB as we speak.
I am doing it using a standard mincroUSB cable (that I use to charge my GNote and SGS2) and added an adapter I got on eBay for my SGT10.1
You can pick one up here: http://goo.gl/EMzpJ
It's not as efficient as the AC charger but it's doing a good job and will get you by if you haven't got access to a power point.
Click to expand...
Click to collapse
I bought one of these not for charging, but it is cheap crap, Or it isnt ment to fit our tab p1000 s connector isnt the same as ours! it destroys the tabs connector, i wouldnt recommend it.

zsolti256 said:
I bought one of these not for charging, but it is cheap crap, Or it isnt ment to fit our tab p1000 s connector isnt the same as ours! it destroys the tabs connector, i wouldnt recommend it.
Click to expand...
Click to collapse
The connector on the 7.7 tab is exactly the same as on P1000. There is no trouble in charging.

My original cable came with the tab allows me to charge via USB @ my laptop, but the charging speed is very slow. So I prefer to use an external portable charger over this most of the time. Not sure if there are any apps or software that allows fast charge kinda stuff?

[Q] Need a better charger cable when plugged into my work computer

So to my understanding the 2a that is supplied to our phones when plugged into the wall is due to the wall part and not the cable. Is there any difference in the cables that could provide me a better charge? I leave my phone plugged into my work computer most of the day and it doesnt seem to give it much of a charge. Is this something wrong with the USB port itself (can you systematically change the output provided on your computer? I wonder if t would make a difference in the front vs back usb ports.
Also I am not against getting a nice dock for it while its here at work but I like to keep it in landscape mode. If anyone knows of one available to keep it on with a clock or something and still eb able to charge it I would be appreciative.
Thanks in advance.

The computer usb ports are normally limited to 500mA. The oem wall charger is 2000mA. So you get 4x the current when plugged into the wall. On top of that some chargers have basic circuits in them that the phone recognizes so it knows to pull more current. If you want a fast charge use the supplied wall charger.
Sent from my SCH-I605 using xda app-developers app

i do wonder about this too, as my iphone will charge (sufficiently) thru pc, but the note 2 takes forever

Do they sell or could you make a cable that has two usb plugs on the end, one that will plug into the computer for syncing and one that could plug into the oem wall charger for fast charging.
I would think you could use the two data wires in the usb to connect to the computer and the two power wires to go to the wall charger. Would be really easy to do and only require an old usb cable for the second male USB A end.
Does anybody have any experience with this or know if its possible. The dock seems to have this ability but I would prefer not to purchase an expensive dock.

Some of the more advanced PC motherboards out there have one or two high-current USB ports that can be set for dedicated smartphone/tablet charging. Most of these are Intel Sandy boards as far as I know.
FWIW the Perseus kernel charges far faster IME than the stock kernel.

The iPhone charges "more" than the Note 2 because the iPhone's battery has a smaller capacity. (1440 mAh vs 3100 mAh) so basically every 1% of battery on the Note 2 is over 2% on the iPhone.
ronzza said:
i do wonder about this too, as my iphone will charge (sufficiently) thru pc, but the note 2 takes forever
Click to expand...
Click to collapse
A

Before I bought the note, I had a sgs with cm10 and a kernel that supports fast charge. It neglects the pins used for data signal on the usb and makes it a power source only, and I'm pretty sure I got around 1mah with this method though I didn't measure it.
Should be no reason for it not to work on our phones if a kernel supports the method.
Sent from my GT-N7100 using Tapatalk 2

USB 3.0 changes from 2.0
MDavisiw said:
So to my understanding the 2a that is supplied to our phones when plugged into the wall is due to the wall part and not the cable. Is there any difference in the cables that could provide me a better charge? I leave my phone plugged into my work computer most of the day and it doesnt seem to give it much of a charge. Is this something wrong with the USB port itself (can you systematically change the output provided on your computer? I wonder if t would make a difference in the front vs back usb ports.
Also I am not against getting a nice dock for it while its here at work but I like to keep it in landscape mode. If anyone knows of one available to keep it on with a clock or something and still eb able to charge it I would be appreciative.
Thanks in advance.
Click to expand...
Click to collapse
Ok so this is my understanding. If it's a laptop they usually only have one usb port inside. its then run to a hub and from there split to all the other laptop usb ports that you see on the outside. so the power is usually lower than the 500ma. I thought the cable from cableforge.com was bad but it was just the low power from the laptop port.
This said USB 3.0 runs on its own line so it usually works better. now this is where i may be wrong isnt the usb 3.0 more than 500ma?

Excelus said:
The iPhone charges "more" than the Note 2 because the iPhone's battery has a smaller capacity. (1440 mAh vs 3100 mAh) so basically every 1% of battery on the Note 2 is over 2% on the iPhone.
A
Click to expand...
Click to collapse
The iphone and most other phones charge "more" because they pulls the entire 500mA that the usb spec allows. For some reason, Samsung phones only pull 96mA over usb. A new cable won't make a difference.

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.
Click to expand...
Click to collapse
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?