Database Users

Need help. My Transformer won't charge anymore

Hi,
I hope someone can help me. My Transformer doesn't charge anymore since yesterday.
Tablet was around 10% when i put the charger in, but the message 'Connect your charger'doesn't go away.
Strange thing is that whenever i plug it in and TF is off, it will turn on, so I guess the wall charger and cable are functioning.
Also when connecting it to my PC I can sync.
I've tried already all the solutions i could find online:
- put the wall charger in the freezer --> didn't work
- cold boot --> didn't work
- factory reset --> didn't work
- tried a different wall charger and connected the wire to a portable battery --> didn't work
- flashed the ROM again --> didn't work
The only way now i have for charging my TF is by USB (connected to PC while turned off). It will charge this way but it takes about 3 hours to get 10% charge from this.
Anyone had this happen already before?

So you tried multiple Asus wall chargers? with no luck? A standard USB charger will not work as those have an output voltage of 5+ when the tf requires 12+.
Sounds like you have a bad charger, you can join the club of thousands... It is a very common issue and not always resolved by the freezer or fiddling trick. If you are able to trickle charge via a PC connection then your cable and tf should be good.
Sent from my SAMSUNG-SGH-I997 using XDA

Link for another discussion where I listed an alternate charger
http://forum.xda-developers.com/showthread.php?p=23917818
It really is heads and tails better than the Asus one
Sent from my SAMSUNG-SGH-I997 using XDA

theraffman said:
So you tried multiple Asus wall chargers? with no luck? A standard USB charger will not work as those have an output voltage of 5+ when the tf requires 12+.
Sounds like you have a bad charger, you can join the club of thousands... It is a very common issue and not always resolved by the freezer or fiddling trick. If you are able to trickle charge via a PC connection then your cable and tf should be good.
Sent from my SAMSUNG-SGH-I997 using XDA
Click to expand...
Click to collapse
No, I tried with a different wall charger (from Motorola). I don't think it's the wall charger though, but to make sure I wil connect it to a phone and check if it's working.
It just feels like the cable and wall charger is working as it should (tablet powers up or screen turns on when I plug it in), but the tablet refuses to charge.
Could it be the pins?
Sent from my GT-I9100 using xda premium

And the motorola USB charger puts out at least 12 volts and not just 5. Is it the wall charger for the zoom? I was UN aware that the zoom used a USB type charger (similar to the tf).
Once again, you can't use just any USB wall charger for the tf... 99% of chargers put out the standard 5 volts which is enough to trickle charge a tf and to slightly charge it in done cases when powered down. I am only adamant about this this because I have sewn this post a hundred times, and 99 of those times it was the charger... Many people don't realize the tf USB charger is very coherent then what most folks are accustom to, even though it looks and acts similar to others.
The only way to confirm is to find someone who has a tf and borrow their charger, our go to radio shack and buy the charger I listed... Which you should do any ways because it's is way way better, my charging cord over all length is 10ft. Beats the hell out of the 2 or 3 you normally would have.
Sent from my SAMSUNG-SGH-I997 using XDA

theraffman said:
And the motorola USB charger puts out at least 12 volts and not just 5. Is it the wall charger for the zoom? I was UN aware that the zoom used a USB type charger (similar to the tf).
Once again, you can't use just any USB wall charger for the tf... 99% of chargers put out the standard 5 volts which is enough to trickle charge a tf and to slightly charge it in done cases when powered down. I am only adamant about this this because I have sewn this post a hundred times, and 99 of those times it was the charger... Many people don't realize the tf USB charger is very coherent then what most folks are accustom to, even though it looks and acts similar to others.
The only way to confirm is to find someone who has a tf and borrow their charger, our go to radio shack and buy the charger I listed... Which you should do any ways because it's is way way better, my charging cord over all length is 10ft. Beats the hell out of the 2 or 3 you normally would have.
Sent from my SAMSUNG-SGH-I997 using XDA
Click to expand...
Click to collapse
Thanks for your replies.
You're right, the Motorola wall charger is only 5v output. It was the one I got with the Milestone. I do start to believe it might be the wall charger after all now.
Unfortunately I don't know anyone else with a TF (anyone reading this lives in Ghent, Belgium with aTF?). Radio Shack isn't an option either since I live in Belgium, but I'll try to find overhere or online.
Anyway, appreciate your help. Might try the freezer thing again in the meantime... you never know.
When you connect your TF to a pc on a usb 3.0 port, should you be able to see the TF charging? Or no way to get more the 5v from this too?
Sent from my Transformer TF101 using xda premium

do u know anyone with an ipad? sure the wall chargers are 15w out and should do the trick.

Alta1r said:
When you connect your TF to a pc on a usb 3.0 port, should you be able to see the TF charging? Or no way to get more the 5v from this too?
Click to expand...
Click to collapse
USB is 5V. No exceptions.
What you can do is build your own PC charger, like the one in my sig.

scottyf79 said:
do u know anyone with an ipad? sure the wall chargers are 15w out and should do the trick.
Click to expand...
Click to collapse
Cheers man, my colleague has an ipad. Will ask him to bring his wall charger.

Goatshocker said:
USB is 5V. No exceptions.
What you can do is build your own PC charger, like the one in my sig.
Click to expand...
Click to collapse
I might try that, but only if I have no other choice (i fear i'll blow up my TF while doing that).

usb chargers are 5v only and will charge but take all day. The TF charger uses the physical usb plug to do double duty. transfer data via usb and charge device using 15v when the charger block sees a gnd signal on pin 7. Charging is not usb. There are several after market chargers that have variable output voltages and an asst of connectors (usb being one) best one is dynex video charger. Also you should not attempt to flash a ROM with 10% charge as you could get stuck in the middle of a charge and have problems.

Well, it was the wall charger after all. Went out to buy a power adapter with 12v and 1000mA output and the tablet is charging again. Many thanks to all people that replied and tried to help me.
For your info: ipad or galaxy wall charger aren't working with our TF's, they both only have an out put of 5v.
Sent from my Transformer TF101 using xda premium

Alta1r said:
Well, it was the wall charger after all. Went out to buy a power adapter with 12v and 1000mA output and the tablet is charging again. Many thanks to all people that replied and tried to help me.
For your info: ipad or galaxy wall charger aren't working with our TF's, they both only have an out put of 5v.
Sent from my Transformer TF101 using xda premium
Click to expand...
Click to collapse
Never allow your charge level fall below 30% because it will cause your charger to overheat and eventually stop working.

Charging the Tf300 (only charges through original charger?)

I've been playing with my Tf300 for a week now.
This weekend I wasn't home and wanted to charge it. It didn't work.
I tried four different chargers including an iPad one, two Griffins, one belkin with no luck.
I have the original cable and two generic ones I bought from Amazon.
All cables work with the original charger... But NONE (even the original one) works with other chargers.
Any ideas if this is wrong?
I would hate to buy a new charger instead of only taking with me any cable with any of the other chargers I own.
Anyone with the same experience? Why is only the original charger working?

Noticed the same thing.
Sent from my ASUS Transformer Pad TF300T using xda premium

Noticed that with the car chargers as well
Sent from my ASUS Transformer Pad TF300T using xda premium

Forgot to mention that I also tried with two car chargers (Kensington and Griffin) with no luck

I'm no electronics expert but I noticed that on my Phone charger (Xperia Mini Pro) it says 850mA, but on the tablet's charger it says 2A. I think that other chargers dont pack enough punch to charge the tablet.

I used an iPad charger with no luck... The car chargers I used all have worked with my iPad.
Anyway, it seems that it's not only mine then.
Now I wonder if there's a work around for this... Besides buying a new original charger

Damn chargers are $30
Sent from my SGH-T989 using XDA

you can charge your device with a "not compatible" charger if the tablet is turned off. for me it worked with the charger of my galaxy nexus but it charges really slow

FallinHigh said:
you can charge your device with a "not compatible" charger if the tablet is turned off. for me it worked with the charger of my galaxy nexus but it charges really slow
Click to expand...
Click to collapse
Thats good to know
Sent from my SGH-T989 using XDA

I read other articles about charging TF300T. For normal charging the charger must have output at least 11v (12v is usual) and 1.5A (18Watts). Its own charger has 15v 1.2A (18Watts).
iPad charger out only 5v 2.1A. TF300 could be charged with iPad charger but the screen must be off (and it will be very slow, overnight for an 1-2 hr normal charge). So check your charger output voltage and amperage. Thank you.

But doesn't have the charger of the TF300T 5V/2A?
I noticed it on my car charger, but it only has 5V/1A. So the tablet does nothing, even when it is turned off.
It only charges with the original charger.
But I assume other chargers with at least 2A should work without any problems, right?

Jake2kOne said:
But doesn't have the charger of the TF300T 5V/2A?
I noticed it on my car charger, but it only has 5V/1A. So the tablet does nothing, even when it is turned off.
It only charges with the original charger.
But I assume other chargers with at least 2A should work without any problems, right?
Click to expand...
Click to collapse
The tf300 charger is not 5V, its either 12V or 15 V (can't remember which). This is why you see nothing. if the only difference was the current (1A Vs 2A) You would still get a charging notification, it would just take longer. The difference in voltage means It should not be able to charge at all off of a normal usb connection.

http://www.ebay.com/itm/US-POWER-AD...?pt=US_Tablet_Accessories&hash=item4d00ab2fac
Saw that guy on ebay for $13. Think it would work?

TXKSSnapper said:
The tf300 charger is not 5V, its either 12V or 15 V (can't remember which). This is why you see nothing. if the only difference was the current (1A Vs 2A) You would still get a charging notification, it would just take longer. The difference in voltage means It should not be able to charge at all off of a normal usb connection.
Click to expand...
Click to collapse
the tablet gets charged on a normal usb port it just doesnt tell you its being charged and it take quite a while to fully charge up

BierLiebHaber said:
the tablet gets charged on a normal usb port it just doesnt tell you its being charged and it take quite a while to fully charge up
Click to expand...
Click to collapse
I haven't seen it charge any when i've plugged it in to my computer via usb. but it could be that I don't have the patience to wait long enough.
---------- Post added at 01:07 PM ---------- Previous post was at 01:05 PM ----------
xAshxMoneyx said:
http://www.ebay.com/itm/US-POWER-AD...?pt=US_Tablet_Accessories&hash=item4d00ab2fac
Saw that guy on ebay for $13. Think it would work?
Click to expand...
Click to collapse
yes, but it will be slower than with the charger it came with. that charger only has a 1.2A output as compared to the 2A of the stock charger.

the tablet gets charged on a normal usb port it just doesnt tell you its being charged and it take quite a while to fully charge up
....
I haven't seen it charge any when i've plugged it in to my computer via usb. but it could be that I don't have the patience to wait long enough.
Click to expand...
Click to collapse
Everywhere I read, people have said that it does not trickle charge at all via usb. Can someone confirm this?

Okay, I can confirm that the TF300T charges at 15V/1.2A.
Both, the tablet and the dock uses 15V. None uses 5V.
I was confused because it's USB. For this purpose it can transform to 5V/2A. But this is not for the tablet.
So I think it's not possible to charge it on a normal USB port.

Has anyone tried using a USB extension cable? I tried one on my Tf300 and it wouldn't charge, no matter what the table arrangement was. It would only charge off its own charger and with only its own USB cable in the USB charger.

At a guess, i'd expect it's because the ASUS charger outputs 15V so the charger or cable will be wired differently to a normal USB lead in order to prevent blowing normal USB devices if you connected them.

USB 3
I can't remember where, but I read that this needs to use USB3 cable. Sorry if this is not the case.

Difference in charging speed with different chargers?

Hi,
I was wondering if using a 2A charger with a normal Micro USB cable will charge my Note 3 as fast as the same charger with a Micro USB 3.0 cable?
Considering that USB 3.0 only delivers a higher output compared to 2.0 when plugged into a PC, I guess it makes no difference when using wall chargers?
Am I right ?
Thanks in advance,
Ben

USB from a PC will always be less than a dedicated charger whether it is usb 2 or 3. A 2 amp charger is what I use but also pay attention to the lead as some are far better at handling higher currents than others as I found out trying various leads whilst running the app at https://play.google.com/store/apps...=organic&utm_term=galaxy+charging+current+apk
Sent from my SM-N9005 using Tapatalk 4

The phone detects if you are using a wall or usb charger, the second is considerably slower. Some usb chargers cheat to seem wall chargers so charges much faster.

What if I use a micro USB cable that is attached to a wall adapter plug, will it still charge fast on note 3?

Divine1604 said:
What if I use a micro USB cable that is attached to a wall adapter plug, will it still charge fast on note 3?
Click to expand...
Click to collapse
Charging is not depend on USB 3.0 or 2.0, it acts differently only while transferring data. Otehrwise for charging both works similar.
The stock wall adapter has 2Amp output and I’ve a power bank with same output and the Power Bank provided with a short USB 2.0 cable and with both it takes same time to full charge. So no issues with the cable.

Charging speed question (amps related)

So we just upgraded to Note 3 from our galaxy 3 (wife and I)...
I noticed the charger is a 2 amp charger compared to the SGS 3's 1 amp.
I started reading some threads here and found out the USB 3.0 cable will not charge the phone faster unless it's plugged into the computer.
Apparently the PCM also limits the phone to charging at 900ma. (not verified)
so I'm curious now.... at what amps does this phone charge? I'm trying to get a spare charger to keep in the car, and also trying to get a usb car charger if I can benefit from the 2.1 amp one instead of the 1 amp one that's in there now....
Can anyone tell me if I should get a 2.1amp charger or stick with 1 amp chargers as the spares if it'll still charge at 900ma?
I'm using USB 2.0 cables btw. (unless I can charge faster with the USB 3.0 when plugged to a car charger or the wall, which I apparently won't from my research here)
While I await for responses, I will plug the charger into my voltage/amp reader and we'll see how much power is being drawn, which might give an idea as to how many ma it's charging at.

For whoever that wants to know this information, these are my findings from my meter that is able to measure how much power is being drawn (kill a watt P3)
with the stock charger and USB 2.0 cable (3.0 made no difference) the phone will charge at 900ma with the screen on. If the phone is shut off, or screen is off, it goes to 1500ma. Very steady at those.
with the SGS3 charger that I had, it's a constant 900ma whether screen is on or off... (1.0 amp charger)
now I guess I will have to see if this is the case with any 2.1 amp charger, or if it's specific to samsung's charger with snapdragon's quick charge feature. I believe only certain chargers allow use of this.

I don't know, I'm getting 1800mA by using stock wall charger with USB3 cable and 450 with USB2 cable. I know GS3 would charge at faster rate when using original Samsung wall charger and cable, which had data lines shorted, not sure if it's the same with Note3.
I don't remember for sure, but I think charging rate from computer was pretty much the same 450mA regardless of USB3 or USB2 port or cable. I remember this because I was surprised they didn't take advantage of higher power ratings with USB3, but maybe it was just my particular setup. I used application that shows charging rate, so all is with phone on, but it makes perfect sense, about 2 hours from 0 to 100% charge, if you allow some extra time for trickle charge at the end, losses and usage.

pete4k said:
I don't know, I'm getting 1800mA by using stock wall charger with USB3 cable and 450 with USB2 cable. I know GS3 would charge at faster rate when using original Samsung wall charger and cable, which had data lines shorted, not sure if it's the same with Note3.
I don't remember for sure, but I think charging rate from computer was pretty much the same 450mA regardless of USB3 or USB2 port or cable. I remember this because I was surprised they didn't take advantage of higher power ratings with USB3, but maybe it was just my particular setup. I used application that shows charging rate, so all is with phone on, but it makes perfect sense, about 2 hours from 0 to 100% charge, if you allow some extra time for trickle charge at the end, losses and usage.
Click to expand...
Click to collapse
and how did you measure this 1800mA?

razorseal said:
and how did you measure this 1800mA?
program is called galaxy charging current, you can get it in the play store.
Click to expand...
Click to collapse

You can't compare that app to a meter that shows you the actual current being drawn
Sent from my SAMSUNG-SM-N900A using Tapatalk

why not? How do you think your meter is working? Phone has similar IC. How did you come up with your numbers first of all? I thought you plug Kill a watt into outlet and it shows what the charger is using at 110v and at about 10 watts(or is it 220-240v for your location), your unit maybe at the limit of accuracy, since the amperage would be somewhere around 100mA, where your device is designed more for larger power consumption like fridge or TV running 300-1000watts and few amps. Is your unit somehow capable of measuring what the charger is outputting and if so, how?
BTW you can't get more than 900mA from PC even over USB3, thats the max limit.
I checked again: galaxy S3 wall charger is giving me 600mA, Note3 charger with USB2 cable gives me 1200mA and Note 3 charger with USB3 cable pumps out 1800mA, computer USB gives 450mA regardless of computer port, but there is something wrong with the USB3 cable that I got, is not connecting properly and I have to wiggle it to connect so maybe bad cable is the reason I don't get higher charge rate from PC USB3.

USB type C to USB A fast charging?

Are USB type C to USB A cables capable of fast charging? Or is USB type C to USB type C the only way of getting fast charging?

You can get somewhat fast charging on an A to C cable theoretically, up to 2.4A, however as USB Type A isn't rated at 3A you won't get the full speed of a true Type C fast charger. I found with many Type A 2.4A chargers though that none say fast charging, but that may just be because I'm using the cable that came with my 6P.

I bought this cable and plugged it into a USB 3.0 port on my pc. It delivers just as much juice as the stock charger. The two both charge at the same rate.
Updated. I'll add that USB 3.0 is capable of delivering up to 5 amps with the right cable.

captainwahid said:
Are USB type C to USB A cables capable of fast charging? Or is USB type C to USB type C the only way of getting fast charging?
Click to expand...
Click to collapse
I have the Play store Google cables and they won't rapid charge with my car rapid charger , but the Type-C to Type-C google cables will with same charger . So I'm thinking no but I don't have a AC rapid charger to confirm .

Gizmoe said:
I bought this cable and plugged it into a USB 3.0 port on my pc. It delivers just as much juice as the stock charger. The two both charge at the same rate.
Updated. I'll add that USB 3.0 is capable of delivering up to 5 amps with the right cable.
Click to expand...
Click to collapse
A USB 3.0 port on a PC can only deliver up to 900mAh. The stock charger is 3000mAh.

geoff5093 said:
A USB 3.0 port on a PC can only deliver up to 900mAh. The stock charger is 3000mAh.
Click to expand...
Click to collapse
That is a big difference in mAh. It does rapid charge pretty fast though when plugged into my pc. It did not rapid charge with the cable Google provided though. I had to buy the joto which I showed above.

Gizmoe said:
That is a big difference in mAh. It does rapid charge pretty fast though when plugged into my pc. It did not rapid charge with the cable Google provided though. I had to buy the joto which I showed above.
Click to expand...
Click to collapse
Does your phone say rapid charging? What does Ampere show as the rate of charge?

Before the car was broken into I had a Belkin 4 port charger and the A-C cord delivered fast charging just fine, the one it came with AND the third party cord I ended up using also, have a couple of Yoozon branded cords from Amazon

I have a-c cable, and tried charge it using a 2.0a power bank. It says charging rapidly. Is it save to charge this phone using power bank?

geoff5093 said:
Does your phone say rapid charging? What does Ampere show as the rate of charge?
Click to expand...
Click to collapse
Yes. It says rapid charging. I'm not home now but will check what it says it charges at. I did grab a screen shot yesterday though. You can see by "USB debugging connected" that I am in fact plugged into my pc and it says rapid charging.

Connected to pc I get Max 1050 mAh. On stock charger I get 1850 mAh Max. So the stock charger will be about 40% quicker than USB 3.0. Guess one could just buy a USB C 3.1 pci card if they need it as fast as the stock charger

Gizmoe said:
Connected to pc I get Max 1050 mAh. On stock charger I get 1850 mAh Max. So the stock charger will be about 40% quicker than USB 3.0. Guess one could just buy a USB C 3.1 pci card if they need it as fast as the stock charger
Click to expand...
Click to collapse
The stock charger is 3000mAh, so depending on how low your battery is (it charges at a higher amperage at a lower battery, and slower as it gets close to full), you would likely see 2500-3000mAh when charging a nearly empty battery, which would be 3x faster than a computer USB port. I'm not sure why it says charging rapidly though, that should only happen if it's above 2000mAh or so.

geoff5093 said:
The stock charger is 3000mAh, so depending on how low your battery is (it charges at a higher amperage at a lower battery, and slower as it gets close to full), you would likely see 2500-3000mAh when charging a nearly empty battery, which would be 3x faster than a computer USB port. I'm not sure why it says charging rapidly though, that should only happen if it's above 2000mAh or so.
Click to expand...
Click to collapse
Maybe an extra pin being present tricks it(wild guess). I did notice the fluctuations in mAh and am glad to know that's normal . One thing I noticed in the app ampere is it said the port was capable of delivering 1800 so maybe it's just reporting wrong in marshmallow.