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3rd party charger screwing with touch screen?

So I've got a bunch of these cheap ebay USB chargers. I was using them with my HTC Kaiser but now I have my desire - When the phone is on charge using one of these, the touch screen won't work properly. It goes crazy, registering its own "touches" so menus fly about, etc. and if I try touching it, it either doesn't register it, registers the touch about 10 times or in the wrong place!
As soon as I unplug, back to normal!
The HTC charger says output: DC 5v, 1amp
This charger says output: DC 5v+- 0.20v, DC500mA +- 30mA
Does this mean these chargers arent quite powerful enough or something? Could I be damaging my phone by using these? They do charge ok but seem to take longer than the HTC charger.

I had exactly the same problem with the G1 and after a fair amount of time researching that issue, I read, and was told that the voltage on many 3rd party charger are not as well regulated as on HTC charger's or pc's USB ports.
On my G1 the problem stayed even after unplugging the charger.
You'd be much better off with a genuine HTC charger or just using your pc's USB ports.

I have the same problem with my phone .. the problem still remained after unpluging and using my own charger.
Does it go away in some time? is your phone ok now?

Well, on my Dream, the problem wasn't constant, but it was there very often, it seem to occur less when I was swapping with some spare charged batteries.
On my Dream the trick was to turn the screen on and off, and it would work most of the time...
I suggest you try to charge of your computer, the voltage output is regulated properly and I was told several times that the opposite, i.e. cheap chargers, were messing with capacitance screens.
I have been charging my Desire with the HTC charger and my PC and haven't had any issues yet.
Better safe than sorry, I wouldn't have got an upgrade if my Dream didn't have that problem in the first place, and it quickly becomes a massive pain! Especially when you have no keyboard.

Problem didn't go away, so I sent my phone to the waranty service.
Using the original charger and original usb cable everything was ok, the problem appeared when I used an usb extender with my computer. First, windows didn't recognize my device, and then the touchscreen problem appeared.

I had the same problem with charger and usb extender but the problem doesn't stay when I take it out. I Won't be using it again that's for sure...thanks for the heads up

manks said:
I had the same problem with charger and usb extender but the problem doesn't stay when I take it out. I Won't be using it again that's for sure...thanks for the heads up
Click to expand...
Click to collapse
i was having screen freezes and stuff with my HD2 HTC desire rom using a 3rd party charger
my guess is , STAY AWAY

I have a JMB branded car charger ([email protected]) with a mini USB connector, but with a Force branded mini USB to micro USB converter. I have no issues whatsoever.

I use a Samsung Micro USB charger and I notice no problems whatsoever, it's like an older version of the charger that comes with the Galaxy S in Europe.
Straight from the plug as it were, it's great, no issues and charges extra fast

Problems with Galaxy S and 3rd party ac adapters!

Yesterday night I was playing with the phone before sleeping. It was charging not with the provided ac adapter, but with the usb-miniusb cable + an aiino usb-ac adapter. Well, the weird thing is that using google maps, the touch/multitouch control was completely f****d up. I mean, it was impossible to pinch-to-zoom, using the zoom buttons worked, but when I used only one finger to move around the map, instead of moving it was zooming randomly in&out without a reason. So I unplugged the cable and it was working perfectly...

It seems your 3rd party ac adaptor is not appropriately grounded so there is a small current on the touchscreen. Capacitive touchscreens recognize minimal changes in currents on the surface. That's why fingers, oranges, organic material work with it, but no stylus or other pens.

Hmm that's an interesting point, I didn't think about that. Do you think I should stop using that charger? Could it damage my device in some way?

I got it with my iPhone 3GS on a car charger too. But it didn't hurt the device at all.
I cannot guarantee this though...

I always used it with my iphone 3g too, and also used my iphone while it was charging...but I never had such an experience on iphone's multitouch...that's really strange!

I had the same issue with a generic ac micro usb charger I bought on ebay.
Since the phone was just newly released, there seemed to be a premium on the chargers described as being for the galaxy s so I went and bought a much cheaper micro usb charger compatible with motorola devices. I figured the contacts would all be the same and all micro usb chargers the same.
Wrong.
As soon as I plugged in that charger, the touch screen was borked. The display was fine but the touch response was shot. If I tap the application drawer in the home screen, it would register a click on some other random spot on the display. The phone was utterly useless while plugged into this charger.
To troubleshoot, I tried mixing it up between the original samsung charger and the generic, resetting etc, and it always came down to the charger. Crap with generic, prefect with original.
TL;DR - not all chargers compatible with samsung galaxy s, borked touch response from generic charger.
Perhaps it would be useful to change the title off this post and move to the accessories forum? Useful for people to add their feedback on generic chargers they've used.
Sent from my GT-I9000 using XDA App

Btw, the charger did charge the phone but I guessed having extra current run through the screen would damage the capacitive sensors.
Compared to the original samsung which has 4 contacts, the micro usb plug on the generic had an extra contact. I tried to open up the plug to see if I could do something about the extra contact but it broke and I the it out.
Shame I didn't think to make a video to share.
Sent from my GT-I9000 using XDA App

changaz said:
I had the same issue with a generic ac micro usb charger I bought on ebay.
Since the phone was just newly released, there seemed to be a premium on the chargers described as being for the galaxy s so I went and bought a much cheaper micro usb charger compatible with motorola devices. I figured the contacts would all be the same and all micro usb chargers the same.
Wrong.
As soon as I plugged in that charger, the touch screen was borked. The display was fine but the touch response was shot. If I tap the application drawer in the home screen, it would register a click on some other random spot on the display. The phone was utterly useless while plugged into this charger.
To troubleshoot, I tried mixing it up between the original samsung charger and the generic, resetting etc, and it always came down to the charger. Crap with generic, prefect with original.
TL;DR - not all chargers compatible with samsung galaxy s, borked touch response from generic charger.
Perhaps it would be useful to change the title off this post and move to the accessories forum? Useful for people to add their feedback on generic chargers they've used.
Sent from my GT-I9000 using XDA App
Click to expand...
Click to collapse
Ok I changed the title, now I think to move it the help of a moderator is required...

i have the same problem with my crap charger. but mine won't even charge, it charges up like 1% / 30 minutes and I can't use it while the phone is turned off because it just turns on by itself. crap.
Sent from my GT-I9000 using XDA App

I use my nokia n97 charger to charge galaxy since I bought it no problem at all
Sent from my GT-I9000 using XDA App

i bought my SGS on ebay and it didn't come with a charger.
the 3rd party charger i bought on ebay doesn't charge the phone and makes it do all sorts of things by itself.
just a warning to others, you may want to spend the extra money on a charger that specifically says it's compatible.

carlocb said:
Yesterday night I was playing with the phone before sleeping. It was charging not with the provided ac adapter, but with the usb-miniusb cable + an aiino usb-ac adapter. Well, the weird thing is that using google maps, the touch/multitouch control was completely f****d up. I mean, it was impossible to pinch-to-zoom, using the zoom buttons worked, but when I used only one finger to move around the map, instead of moving it was zooming randomly in&out without a reason. So I unplugged the cable and it was working perfectly...
Click to expand...
Click to collapse
same problem with my desire, with a 3rd party microusb charger .... when i use pinch to zoom the screen goes crazy

Note that if I touch the usb cable ground (outer metal part) with one hand, my touch screen then works.

cedricberger said:
Note that if I touch the usb cable ground (outer metal part) with one hand, my touch screen then works.
Click to expand...
Click to collapse
This is definitely something to do with Capacitive touchscreens.
Similar thing happeend to my ipod touch 3g when I used a 3rd party wall charger on it

How bad is it to our phones ?....
I would like to know what is really happening.
Is the usb charger "ground" at an important voltage relative to earth ground ?
Is it at a variable voltage, which would even more confuse our phone ?
Could we safely ground it, and how ? (connecting the usb ground to earth, maybe via a grounded 220V plug ?) .
I think anyway I will at least mesure the voltage (and maybe leaking current relative to real ground) level of this usb "ground"...
Any electronician to explain how it is normally done in quality chargers ?

cedricberger said:
How bad is it to our phones ?....
I would like to know what is really happening.
Is the usb charger "ground" at an important voltage relative to earth ground ?
Is it at a variable voltage, which would even more confuse our phone ?
Could we safely ground it, and how ? (connecting the usb ground to earth, maybe via a grounded 220V plug ?) .
I think anyway I will at least mesure the voltage (and maybe leaking current relative to real ground) level of this usb "ground"...
Any electronician to explain how it is normally done in quality chargers ?
Click to expand...
Click to collapse
I'm not sure what ground here is! My e-bay travel charger 4.7v 500mA with a Samsung logo has no ground connection on the charger - normal in Europe. Problem probably is that it is possibly not a Samsung unit at all - well it only cost 1euro - It does charge and the screen does freeze until I disconnect it. Only got it today - but nothing is getting hot and no other problems so far. The voltage rating is of course less than the standard 5v.

Bought a Belkin Dual USB car charger (1.0A + 0.5A) online. Will report back.

Rofa1 said:
I'm not sure what ground here is! My e-bay travel charger 4.7v 500mA with a Samsung logo has no ground connection on the charger - normal in Europe. Problem probably is that it is possibly not a Samsung unit at all - well it only cost 1euro - It does charge and the screen does freeze until I disconnect it. Only got it today - but nothing is getting hot and no other problems so far. The voltage rating is of course less than the standard 5v.
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Click to collapse
My best shots would be no ground (mass) issues, but:
1. stability of the charger output voltage
2. stability of the charger output current
3. value of the charger output voltage
4. capacity of the filter capacitors in the charger (too little - 50/60 Hz hum is distributed to the output)
5. Is the charger impulse or stabilized?
Capacitive screens must be very sensitive to changes of impedance and if there is no stable voltage or current or if the output is interfered with electrical network hum, the touchscreen may go crazy in my opinion...
edit: format tags corrected

Working fine without any capacitive screen issues.
The good thing is it works as charger mode instead of USB. So I assume the 1.0A socket would actually charge faster than USB mode.
v205 said:
Bought a Belkin Dual USB car charger (1.0A + 0.5A) online. Will report back.
Click to expand...
Click to collapse

It will be high-frequency noise on the DC output voltage of the charger. Chargers use a high-frequency DC-DC converter method and the cheaper ones don't do a very good job of filtering the high frequency out of the DC at the other end. This noise enters your phone and plays havoc with the sensitive circuits in the capacitive touchscreen.
It is nothing to do with grounding of the input side of the power supply; when you ground the output side (the USB plug) with your hand, your body capacitance filters out some/all of the noise.
You could probably filter this out by adding capacitors or whatever but really, the solution is don't buy $1 chargers for your $x00 phone.

[Q] stock, unrooted one x battery problem..help?

My friend threw her phone on charge for the whole night and woke up this morning to find her battery level low. This isn't the first time it happened either. What could cause this?
P.S. the screenshot was taken right after the phone was pulled off the charger
Sent from my Galaxy Nexus using xda premium

Try a different charger? Also, if the phone was charged by USB, use the wall charger instead. Some USB ports may cut power when the computer is asleep, etc. For instance, I usually connect my phone to my PC using the USB ports on my monitor (just because they are conveniently located). Those ports get shutdown when the computer goes to sleep, which I always forget.

redpoint73 said:
Try a different charger? Also, if the phone was charged by USB, use the wall charger instead. Some USB ports may cut power when the computer is asleep, etc. For instance, I usually connect my phone to my PC using the USB ports on my monitor (just because they are conveniently located). Those ports get shutdown when the computer goes to sleep, which I always forget.
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Click to collapse
Well she plugs into the wall, never the computer. And the charger she uses is the charger that came w/ the phone. If its the charger that could possibly be the issue then I'll tell her to get it swapped out at an at&t store but I really don't think that's the issue honestly
Sent from my Galaxy Nexus using xda premium

Chargers can definitely just crap out, even if new. MicroUSB chargers are pretty common, and I've used ones for other devices (like my Motorola Bluetooth headset) on my One X just fine. If you have another MicroUSB charger laying around, its worth checking (just to eliminate the charger as the cause) rather than having to run to the store.
Otherwise, its possible there is something wrong with the microUSB jack on the phone itself, or some other hardware or software problem with the phone. If the charger is not the problem, backup personal data and factory reset the phone. If the problem still occurs, I'd recommend getting a warranty replacement.

redpoint73 said:
Chargers can definitely just crap out, even if new. MicroUSB chargers are pretty common, and I've used ones for other devices (like my Motorola Bluetooth headset) on my One X just fine. If you have another MicroUSB charger laying around, its worth checking (just to eliminate the charger as the cause) rather than having to run to the store.
Otherwise, its possible there is something wrong with the microUSB jack on the phone itself, or some other hardware or software problem with the phone. If the charger is not the problem, backup personal data and factory reset the phone. If the problem still occurs, I'd recommend getting a warranty replacement.
Click to expand...
Click to collapse
I appreciate it man, will do
Sent from my Galaxy Nexus using Tapatalk 2

Can you confirm that there was a "lightning bolt" in the battery icon in the status bar? If it's charging, there should be a lightning bolt in it. Check when you plug in the charger and just before unplugging it. If the lighting bolt is missing then most likely there is no current going into the device to charge the battery. It could also be a bad battery if the charger is working fine.

DroiDAddicT14 said:
My friend threw her phone on charge for the whole night and woke up this morning to find her battery level low. This isn't the first time it happened either. What could cause this?
P.S. the screenshot was taken right after the phone was pulled off the charger
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
Are you absolutely sure the power outlet was switched on? May seem like a silly question but I've done it before.
Sent from my HTC One XL using xda premium

denversc said:
Can you confirm that there was a "lightning bolt" in the battery icon in the status bar? If it's charging, there should be a lightning bolt in it. Check when you plug in the charger and just before unplugging it. If the lighting bolt is missing then most likely there is no current going into the device to charge the battery. It could also be a bad battery if the charger is working fine.
Click to expand...
Click to collapse
Yes there was definitely a lightning bolt when it was on. And is it possible to wipe the battery stats even if the phones not rooted?
Sent from my Galaxy Nexus using Tapatalk 2

timmaaa said:
Are you absolutely sure the power outlet was switched on? May seem like a silly question but I've done it before.
Sent from my HTC One XL using xda premium
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Click to collapse
The outlet isn't switch operated lol. It has a constant 120V
Sent from my Galaxy Nexus using Tapatalk 2

[Q] nexus s does not charge via ac adapter

Heyo guys, I've got a problem with charging my Nexus S.
When I'm using the ac adapter to charge my phone, but it is always showing in the battery menu "not charging". But if I use the USB cabel to charge it by plug it in the PC, it works.
Only sometimes it works with the charge kit, but I don't know why it does not sometimes.
Also, while it's charging with the adapter, the battery drains.
I hope that I'll get a quick answer
-devil188
Picture shows the battery screen while charging.
Sent from my Nexus S using xda app-developers app

devil188 said:
Heyo guys, I've got a problem with charging my Nexus S.
When I'm using the ac adapter to charge my phone, but it is always showing in the battery menu "not charging". But if I use the USB cabel to charge it by plug it in the PC, it works.
Only sometimes it works with the charge kit, but I don't know why it does not sometimes.
Also, while it's charging with the adapter, the battery drains.
I hope that I'll get a quick answer
-devil188
Picture shows the battery screen while charging.
Sent from my Nexus S using xda app-developers app
Click to expand...
Click to collapse
Try another AC adapter for nexus s and then check, may be your one is not working, if if does charge through data cable then one thing is clear that there is something in the adapter

same problems for me...
I have same problem.. the only way I can charge is to turn off phone and then insert power chord. Then phone starts off and charges. but when its already on, the phone does not charge with usb or wall chargers. I have tried multiple of them and I think its slimbeans 4.2.2 issue on nexus S.
Would it be better to go to ICS or other ROMS? or is this hardware problem for sure?
Regards,
Sachin

ssachin1001 said:
I have tried multiple of them and I think its slimbeans 4.2.2 issue on nexus S.
Would it be better to go to ICS or other ROMS? or is this hardware problem for sure?
Click to expand...
Click to collapse
i have been on slim 4.2.2 since the first beta and my
NS charges every time i plug it in...
fwiw

I bought a new one and it doesn't work either. For now, only charging with the USB port works.

Touch Screen Responsiveness While Charging

Hi guys,
I have a new XT1033 (Aussie dual sim version) Moto G.
When using the packaged charger, the screen becomes quite unresponsive. This seems to be a problem with a few other phones too. (Droid Incredible, GSII and Epic 4G all have threads on this problem.)
Why does this happen, and is there a fix?
Thanks,
Greg

It also happened to me with Samsung charger... I changed USB cable and everything seems to be working fine from that time... but I don't know if it's problem in USB cable with one contact missing or it just happen randomly.

Happened to me as well, when first charged it and was still on Jelly Bean. No such problem since the update to Kitkat, same cable and charger.

centavar said:
Happened to me as well, when first charged it and was still on Jelly Bean. No such problem since the update to Kitkat, same cable and charger.
Click to expand...
Click to collapse
I've found it to happen on both JB and KK.
But I've also had periods on both where it works as usual. you're probably just experiencing one of those periods.

gregneal said:
I've found it to happen on both JB and KK.
But I've also had periods on both where it works as usual. you're probably just experiencing one of those periods.
Click to expand...
Click to collapse
Just as I grabbed the phone to read the email about your responce and it happened again Soo yeah, apparently it happens on KitKat too... Good thing the phone charges relatively quick.

I got the same with a charger screen doesnt work...but it doesnt work also on other phone..
Im using another 1A charger now and no problem when charging.

It's caused by electrical interference from the charger affecting the capacitive screen. Sometimes using a case can make it worse.
Sent from my XT1032 using Tapatalk

I had the same problems as well, and i contacted Motorola, they said the voltage in the charger you're using is to low
Sent from my XT1032 using xda app-developers app

t-bon3 said:
It's caused by electrical interference from the charger affecting the capacitive screen. Sometimes using a case can make it worse.
Sent from my XT1032 using Tapatalk
Click to expand...
Click to collapse
You nailed it right!! It is usually due to the 'Parasitic capacitive coupling' and poor quality of Power/charger/USB cable.. This occurs only in capacitive sensing units and when using SMPS based power supplies. This even affects laptop trackpads..

I'm having the same problem with my moto E and don't think its worth starting a new thread. I googled the issue and ended up here. Does anyone know of a charger that doesn't do this while charging? Also it doesn't have the issue when plugged into the computer. Right now for charging I am using a charger from an old blackberry bold. when using a charger that makes the phone do this, is it causing damage to the phone at all?

I had a similar issue with my old Motorola Defy+ and its charger. It's a problem linked to charger you are using. Try a different one.

Giugo said:
I had a similar issue with my old Motorola Defy+ and its charger. It's a problem linked to charger you are using. Try a different one.
Click to expand...
Click to collapse
I'm using a samsung charger that someone abandoned at one of my dads sporting events and it seems to work ok but I can't jump to conclusions to quickly. So far so good though

I also noticed it when charging. The screen became less responsive, not really a problem for me since i only charge my phone overnight.
Is this related to the charger voltage? I'm using the original motorola charger.

sidewalk_ said:
I also noticed it when charging. The screen became less responsive, not really a problem for me since i only charge my phone overnight.
Is this related to the charger voltage? I'm using the original motorola charger.
Click to expand...
Click to collapse
It could be related to voltage, because capacitive touchscreen recognizes finger's position from the the voltage variations on the display's surface
As you can read on Wikipedia:
In this basic technology, only one side of the insulator is coated with conductive material. A small voltage is applied to this layer, resulting in a uniform electrostatic field. When a conductor, such as a human finger, touches the uncoated surface, a capacitor is dynamically formed. Because of the sheet resistance of the surface, each corner is measured to have a different effective capacitance. The sensor's controller can determine the location of the touch indirectly from the change in the capacitance as measured from the four corners of the panel: the larger the change in capacitance, the closer the touch is to that corner.
Click to expand...
Click to collapse
By the way try a different charger and be sure that matches these specs:
voltage 5.0V
current 0.5~1.5A

Giugo said:
It could be related to voltage, because capacitive touchscreen recognizes finger's position from the the voltage variations on the display's surface
As you can read on Wikipedia:
By the way try a different charger and be sure that matches these specs:
voltage 5.0V
current 0.5~1.5A
Click to expand...
Click to collapse
wow that is so far off from what I was using to charge mine no wonder I had problems
The one that gave me issues was only 750mA and 1.5v or something like that.
The one I have now is 5V 2A
will the fact that it is over the 1.5 A damage the phone at all?

My charger also has 5V 2A and I am having the responsiveness problem
Sent from my XT1032 using XDA Free mobile app

mikee286 said:
The one I have now is 5V 2A
will the fact that it is over the 1.5 A damage the phone at all?
Click to expand...
Click to collapse
No, it won't.
I took the text below from here
In order to keep the price low, Motorola made many cost-saving decisons. In this case, our research showed that many people already had a suitable Motorola charger available, or a PC or other device that can be used to charge Moto G.
Any Motorola charger with the correct micro-USB tip will charge your Moto G. You will see the best results when the output of the charger is between 500 mA and 1.5 A. The higher the output, the faster your Moto G will charge.
If your charger output is higher, the MOTO G will automatically restrict the charging rate. If your charger is lower, it will simply take longer to reach a full charge.
Click to expand...
Click to collapse

,pp
---------- Post added at 12:29 PM ---------- Previous post was at 12:24 PM ----------
Just example of bad responsive touch screen. Can't erase

I have totally different issue. Touch screen of my MOTO E is not responding. When I connect it to PC through USB Cable, after some time, touch becomes OK. But again when I remove the cable, after some time again the touch become un-responsive. Has anyone face this problem.