I did a quick search to see if anyone had this issue. Most chargers output 5.0 volts while the Touchpad charger outputs 5.3volts. While my problem is with a Nexus S, I think this will be of interest to Touchpad owners given the possible cause.
The other day I accidently used my Touchpad charger to recharge my Nexus S. Afterward, everything seemed fine until I attempted to connect it to my laptop to offload some files. While it worked the day before, my laptop (Windows 7 64-bit) no longer discovers the device. Suspecting a problem, I connected to another PC running Win7 32-bit and a Mac running Snow Leopard. All with Android SDK and drivers properly installed with the same result. The same goes if I first put the Nexus in bootloader mode.
What makes me think there may be hardware damage is this. If I power off the Nexus S, then plug in a charger or USB cable, the phone boots. I do not believe it did so before. In addition, in the past if I plugged a charger or USB cable the LCD would briefly light up. After the incident, it doesn't. It still charges though.
Not necessarily looking for answer here, just thought this might be a word of caution for those like me who own both devices.
It should'nt have
5.3 V instead of 5V = not a big enough difference to cause a problem
2A instead of 1A means nothing regarding your current (no pun intended) problem
Plus your nexus S has charge protection to protect it from incompatible chargers
I use my TP charger to fast charge (because of the 2A thing) my GS II and my wifes HTC desire
However Fast charging is not good for the long term life span of the battery
Nomedias said:
I did a quick search to see if anyone had this issue. Most chargers output 5.0 volts while the Touchpad charger outputs 5.3volts. While my problem is with a Nexus S, I think this will be of interest to Touchpad owners given the possible cause.
The other day I accidently used my Touchpad charger to recharge my Nexus S. Afterward, everything seemed fine until I attempted to connect it to my laptop to offload some files. While it worked the day before, my laptop (Windows 7 64-bit) no longer discovers the device. Suspecting a problem, I connected to another PC running Win7 32-bit and a Mac running Snow Leopard. All with Android SDK and drivers properly installed with the same result. The same goes if I first put the Nexus in bootloader mode.
What makes me think there may be hardware damage is this. If I power off the Nexus S, then plug in a charger or USB cable, the phone boots. I do not believe it did so before. In addition, in the past if I plugged a charger or USB cable the LCD would briefly light up. After the incident, it doesn't. It still charges though.
Not necessarily looking for answer here, just thought this might be a word of caution for those like me who own both devices.
Click to expand...
Click to collapse
I've been charging my Nexus S 4G as well as a couple of other android phones (Samsung Vibrant and Samsung Epic) regularly without issue for a month or so. I doubt the Touchpad charger was the issue.
I've been using the touchpad wire to charge my evo 4g for over amonth and it's still fine.
Thanks for the feedback guys. Now I'm stumped as to why it happened. It is definitely something lower-level than OS, given the boots-when-plugged-in behavior.
End result is I can only transfer files wirelessly, and since I recently reverted to stock, I can't root it again. Hopefully, the official ICS update is an OTA, and not via USB (like froyo on Samsung Vibrant). If not, I'll seek warranty replacement.
Sent from my Nexus S using xda premium
It hasn't effected my nexus s
even though the charger is higher rated im pretty sure the phone only draws the maximum that is safe.
Just a thought: have you been using the same data cable to test this the entire time? It is possible for a cable to charge but not be able to transfer data. You may want to try a different cable just in case... just an idea.
jake921660 said:
even though the charger is higher rated im pretty sure the phone only draws the maximum that is safe.
Click to expand...
Click to collapse
Voltage is "given" by the charger and current is "drawn by the device.
High overvoltage would be dangerous but not 0.3v!
The charger could be faulty and have affected the TP while still being usable for other devices.
And the TPs dont like under current charging either.
cpenticuff said:
Just a thought: have you been using the same data cable to test this the entire time? It is possible for a cable to charge but not be able to transfer data. You may want to try a different cable just in case... just an idea.
Click to expand...
Click to collapse
Forgot to mention I tried different cables as well. The same cables transfer data to/from other devices like my Touchpad, but not the Nexus S. Good idea though.
Sent from my HP Touchpad using xda premium
I've been charging my htc windows phone with the touchpad charger. It's almost twice as fast and i haven't had any problems.
I have been temped to use it but. the NS charger gives 700ma while the TP gives 2000ma, If you want your battery to live more years use the stock.
I even use the NS charger to charge the touchpad... it will charge to 100% during the night.
I use my 2A Galaxy Tab charger to charge everything, never had a problem. If my SGS2 is happy with it, the Nexus S shouldn't have a problem either.
Amperage is how much current the charger is capable of supplying, the device plugged into it won't necessarily draw anywhere near that much, I'd be surprised if any regular phone would draw as much as 1A while charging.
Put a multimeter across any 5V charger and you'll probably find it's putting out anywhere from 4.5V to 5.5V unless it's a particularly good quality one. If it's high current charger then it's more likely it'll have a more stable voltage under load (i.e. - while charging).
A +/- ~10% difference in charging voltage should be within tolerance for pretty much any electronic device.
I also use the TP charger for my Sensation, no problems.
Sent from my Sensation using Tapatalk
robrob777 said:
I have been temped to use it but. the NS charger gives 700ma while the TP gives 2000ma, If you want your battery to live more years use the stock.
I even use the NS charger to charge the touchpad... it will charge to 100% during the night.
Click to expand...
Click to collapse
Sorry to correct you, but, current is drawn by the device and it will only draw what it needs so there should be no problem
Have you tried blowing out the usb port on your phone or cleaning the connection?
thebadfrog said:
Have you tried blowing out the usb port on your phone or cleaning the connection?
Click to expand...
Click to collapse
Thanks, but no it didn't work.
Sent from my HP Touchpad using xda premium
Nomedias said:
I did a quick search to see if anyone had this issue. Most chargers output 5.0 volts while the Touchpad charger outputs 5.3volts. While my problem is with a Nexus S, I think this will be of interest to Touchpad owners given the possible cause.
The other day I accidently used my Touchpad charger to recharge my Nexus S. Afterward, everything seemed fine until I attempted to connect it to my laptop to offload some files. While it worked the day before, my laptop (Windows 7 64-bit) no longer discovers the device. Suspecting a problem, I connected to another PC running Win7 32-bit and a Mac running Snow Leopard. All with Android SDK and drivers properly installed with the same result. The same goes if I first put the Nexus in bootloader mode.
What makes me think there may be hardware damage is this. If I power off the Nexus S, then plug in a charger or USB cable, the phone boots. I do not believe it did so before. In addition, in the past if I plugged a charger or USB cable the LCD would briefly light up. After the incident, it doesn't. It still charges though.
Not necessarily looking for answer here, just thought this might be a word of caution for those like me who own both devices.
Click to expand...
Click to collapse
It's not the extra voltage. Either user error, reread guides... or hardware, cant't help you.
Nomedias said:
I did a quick search to see if anyone had this issue. Most chargers output 5.0 volts while the Touchpad charger outputs 5.3volts. While my problem is with a Nexus S, I think this will be of interest to Touchpad owners given the possible cause.
The other day I accidently used my Touchpad charger to recharge my Nexus S. Afterward, everything seemed fine until I attempted to connect it to my laptop to offload some files. While it worked the day before, my laptop (Windows 7 64-bit) no longer discovers the device. Suspecting a problem, I connected to another PC running Win7 32-bit and a Mac running Snow Leopard. All with Android SDK and drivers properly installed with the same result. The same goes if I first put the Nexus in bootloader mode.
What makes me think there may be hardware damage is this. If I power off the Nexus S, then plug in a charger or USB cable, the phone boots. I do not believe it did so before. In addition, in the past if I plugged a charger or USB cable the LCD would briefly light up. After the incident, it doesn't. It still charges though.
Not necessarily looking for answer here, just thought this might be a word of caution for those like me who own both devices.
Click to expand...
Click to collapse
I am having the exact same problem. My phone does not boot on its own when I connect the USB cable, which is a slight difference from what you described, but everything else is identical.
I hadn't previously thought of the Touchpad charger being the root of the problem, but after Googling "Nexus S charging but not USB connection," I came across this thread...and wouldn't you know, I've been using my Touchpad charger for the past two nights.
I haven't made any changes to my phone in the last two days. The only thing different from my normal routine was Touchpad charger.
May I ask, why touchpad can not charge with USB port on computer, only charge with hp touchpad charger ?
when I plug my usb cord into my tab it pops up with MTP initialisation and my computer doesnt recognise the the tablet. also, it doesnt look like its charging either. the battery icon has a red x in it. ive tried different cables and have rebooted once.
Does anyone have any idea what I can do from here to get this thing rocking again?
thanks in advance for any help thrown my way!!!
EDIT: found my problem atleast for the red x...I assume I wasnt getting enough power off of my wall charger. Went back to the charger that my tab came with and it is a ok now. The MTP thing still has me puzzled. It seems to be fine now so I will be a happy camper!
Thanks XDA brothers and sisters!
Turn Debugging Mode off.
Super Jamie said:
Turn Debugging Mode off.
Click to expand...
Click to collapse
dubugging is off...it seems to have quit showing intialising but the battery icon still has a red x in it and it doesnt seem to be charging. when I press the usb icon on the tablet it pops up saying usb connected and right under that it says MTP connected.
this battery thing is really starting to worry me...
thanks for all help I can get with this...
Your Tab is working completely and utterly normally!
MTP is the way Honeycomb works with USB-to-PC connections due to the way the storage system works in Honeycomb.
The simplest explanation (note the length!) is that instead of having "internal" storage and "external" storage (SD card), Honeycomb merges the two together so that you have one large unified storage system meaning that you have ALL of the available space for applications rather than, say, 1GB for apps but 32GB for media as an example.
MTP is the way to get round the fact that if you mount the storage as "Mass Storage" like with Gingerbread and below phones, then Honeycomb MUST un-mount the storage from the android operating system, which as you should hopefully expect, will cause ANY app reliant on this storage to crash or worse.
I appologise if you already knew all that and I misunderstood your question, but lots of people have asked the same question and I'm not convinced you even searched before asking, but I'm nice so offer explanations rather than "JFGI"
Right, that's MTP out of the way, now for the red cross:
This one is a lot simpler: the Tab requires a lot more current than a USB connector is really meant for (5A compared to ~2A) and this can overload some USB hubs. To prevent this happening, the Tab disables charging over USB from a computer (this is what the red cross means). The wall-socket that comes in the box has some circuitry that says "oh hi Mr. Tab, here's your full charge current"
There is a way round the charge-over-USB using Pershoot's kernel, I suggest you search the Android Development section for "charge over USB"
chaosdefinesorder said:
This one is a lot simpler: the Tab requires a lot more current than a USB connector is really meant for (5A compared to ~2A) and this can overload some USB hubs.
Click to expand...
Click to collapse
The wall charger that comes with the tablet delivers 2A. Standardized USB offers 0.5A. Most of the standard USB plugs will deliver 1A but that is "outside" of the specification. Charging the tablet with 0.5A will take around 4 times longer than with 2A, meaning a full charge would take about 15 to 20 hours. So for most people that would be useless. Although I too would be grateful for the option at least, just in case I forget my samsung charger when on vacation.
Regards
Achim
general1977 said:
The wall charger that comes with the tablet delivers 2A. Standardized USB offers 0.5A. Most of the standard USB plugs will deliver 1A but that is "outside" of the specification. Charging the tablet with 0.5A will take around 4 times longer than with 2A, meaning a full charge would take about 15 to 20 hours. So for most people that would be useless. Although I too would be grateful for the option at least, just in case I forget my samsung charger when on vacation.
Regards
Achim
Click to expand...
Click to collapse
thanks for the clarification, slight order of magnification out, but general gist was there!
when I plug my usb cord into my tab it pops up with MTP initialisation and my computer doesnt recognise the the tablet. also, it doesnt look like its charging either. the battery icon has a red x in it. ive tried different cables and have rebooted once.
Click to expand...
Click to collapse
Follow this guide to enable USB charging to remove that red X
As for why its not recognizing, try installing the samsung drivers.
My Nook charges fine when turned off but does not charge at all when powered on. My nook also does not show up as a connected device when I plug it into my computer. I am rooted running CM9. Any advice?
Thanks
mikenexus said:
My Nook charges fine when turned off but does not charge at all when powered on. My nook also does not show up as a connected device when I plug it into my computer. I am rooted running CM9. Any advice?
Thanks
Click to expand...
Click to collapse
IF you mean that it doesn't charge while the screen is on and connected to the PC, that's normal behavior... the current draw is too much for the USB port to maintain the operational draw as well as provide any extra to charge it. Most of the time, you'll notice that you're actually still losing charge even though it's plugged into the PC... albeit at a much slower rate than usual.
As far as it not being recognized... what do you mean? You don't get the drives mounted? It's not being recognized by ADB? There's plenty of threads related to ADB, try giving it a search. If you mean that the drives aren't being recognized, you have to have a SD card in and turn on USB Sharing (or whatever it's actually called) it should be in the notification area.
Thanks for the reply,
It does not charge from an outlet while powered on; only when powered off.
What I mean in regards to it not showing up on the PC: I plug it in and it does not even recognize a device is plugged in - I don't even get to the install new drivers part. Its as if nothing was ever plugged to begin with.
The nook is recognized when I use my galaxy nexus usb cord and attach it to the computer. I am starting to think this is a hardware issue; I just find it strange that the hardware works as intended while the Nook is powered off.
Mike
There's a chance that you have a broken Nook cable then.
Try getting a battery monitoring app to see what sort of current you're getting while it's on. Is the "n" on the cord lighting up while it's plugged in and on?
Yes, when it is on and plugged in the "n" is green no matter the charge
I think you should try a different Nook cable, they can do that for you at B&N's actual store without you having to buy a new cable. If that doesn't work I would wager that it would be the port.
Now, I feel I should point out that for reasons unknown to me that manual specifically says you should not plug the unit in to charge while the unit is off. As I said, I don't know why. I know I have done that with my iPhone when I need a really fast charge (plug it in, then turn it off) but never had to do that with the Nook. Just... Some FYI for you.
Hi!
So basically I can charge the tablet with no issue but when I connect it to my pc (or the one at work) it suddenly is no longer being detected (no USB plug in sound).
At home I was able to make it work but it would seem that moving the cable a bit will make it go off so somehow the cable must be bad I think even though physically outside it looks great.
Could that be it?
shaolin95 said:
Hi!
So basically I can charge the tablet with no issue but when I connect it to my pc (or the one at work) it suddenly is no longer being detected (no USB plug in sound).
At home I was able to make it work but it would seem that moving the cable a bit will make it go off so somehow the cable must be bad I think even though physically outside it looks great.
Could that be it?
Click to expand...
Click to collapse
its very plausible that you could have a bad usb wire. if you wiggle it and get a connection very likely turns to 100% sure. There are different wires for charging and data within the cable. no connection when you plug it via dock either? (just want to rule out on board connector)
I will have to test on the dock but when it connected yesterday, I tried moving the plug around the table area to see if it was there and it never disconnected yet moving from the USB side connected to the PC made it disconnect so it makes it sound like a bad cable for sure...and hopefully
Hi All,
I was wondering if anyone had any insights in to this problem I have been having.
Briefly, I have the 4g lte verion on EE's new network. I purchased the official MHL/HDMI adapter which works fine and the video is outputed to my sammy 50inch tv fine. The issue I have is the battery drains while doing so. I belive this may to due to the phone outputting more than it is drawing from the power source. Any thoughts ?
I spoke with Samsung tech and they said a number of people have started to report this issue and they are currently testing/investigating. If this is indeed the case seems a pointless acessory as a long video would possibly drain the whole battery, Im yet to test the full drain time.
Secondly, with a 3rd party docking cradle with spare battery slot which purchased from amazon (http://www.amazon.co.uk/eLifeStore®-Samsung-Desktop-Charger-Docking/dp/B008PPRGFY) also does not charge phone properly. Even with the orignial charger in the ac port (or usb port) . The phone reports as charging but stays the same or decreases. Charged directly from the socket it is fine. Strange!
Any help or thoughts would be greatly appreciated.
Thanks
Ian
It's common. Mine did that too! I switched to my old S2 charger, problem solved
Thanks Ill try that out, any idea why that works ?
lawboffin said:
Thanks Ill try that out, any idea why that works ?
Click to expand...
Click to collapse
No idea man? A design fault maybe? All I know is that my phone took for f#*%ing ever to charge with the USB type wall charger. I pulled it out of the socket and plugged my other other one in that was sitting right next to it and it started charging? Checked a few minutes later and it had climbed considerably so I pulled the USB cable out of the new plug and kicked it under the bed where it now lays resting not to be used again LOL.
USB plug/cord works perfectly fine? So I use it on the computer. My laptop even charges the phone via the USB cable faster than the socket plug (which is usually the opposite - as I am sure we are all aware). So yeah I would say poor design or defective wall plug or both or something? Wasn't going to send my phone back because of it. 2second decision problem solved Samsung phone is great!
Im having exactly the same problem.
I have an s3 on orange and have the same mhl adapter conected to my tv.
I have tried the charger from my s3 which does says its charging when I connect my phone but only for about a minute so I also tried using the charger from my s2 and that just does exactly the same.
An easier way is to buy the official allshare dongle for your hdtv then you can stream anything from your phones screen direct to your tv and can have the phone on charge via pc or wall socket at the same time,
Hope this helps
i suggest you throw away your original charger (slow charge) and its usb cable (loose - actually caused the extsd to become damaged to the point i had to repartition) and buy yourself a cheap usb cable for data (£2) and a 3rd party charger (pref not a usb adapter one - £5) and all should be fine!
I still experienced a small battery drain while using the mhl adapter, however, i froze a few apps with titianuim (ones i know run all the time like utter and tasker, paragon ntfs, easy ums, directory bind etc), and put it on min brightness - works like a charm. I know its a effort freezing apps but does the trick with my phone... Since finding that out i actually keep paragon & easy ums frozen till i need them...
just a few thoughts for you....