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Support Touchscreen acting strange while charging? Here's why.

Discussion in 'Android Devices' started by kbohip, Aug 23, 2010.

  1. kbohip

    kbohip Well-Known Member
    Thread Starter

    Jul 14, 2010
    So tonight was the first night I tried out a charger I bought from Ebay a couple weeks ago. I compared the output to the original Samsung charger that came with the phone. I noticed that the Samsung charger said it had a 5.0 volt output, while the Ebay charger had a 5.2 volt output. I didn't think much of this other than "Great! It'll charge faster!"

    As soon as I plugged my phone (turned on) into the Ebay charger the touchscreen starting acting up big time. It wouldn't respond to button presses and it even had a mind of it's own by going to screens itself, even though I hadn't pressed a button to go there.

    I unplugged it and got out my voltage meter. It turns out both chargers were not putting out the specified voltage. The Samsung charger that is rated at 5.0 volt output was actually putting out 5.2 volts. The Ebay charger that was rated at 5.2 volts output was actually putting out 5.62 volts! That's a full 10% over what the phone is supposed to be getting. No wonder the screen wouldn't respond.:eek:

    Here's the same type of charger I got from Ebay. It has a usb port on the bottom that I plugged a micro usb cable into.

    I read a thread here a while back with people complaining about strange behavior from the touchscreen while using aftermarket chargers. My advice is to NOT USE any aftermarket charger that's rated at over 5.0 volts output. This over voltage might not hurt the phone at all, but then again it's better to be safe than sorry.


    SamsungVibrant likes this.
  2. SamsungVibrant

    SamsungVibrant Well-Known Member

    Jul 23, 2010
    Thank you for this helpful post. I think people should now understand why T-mobile charges so much more for authentic assessories. I find it so mind blowing that we own 500 dollar phones, yet people want to stick a 4.99 battery from ebay into it. Some even believe just because it says samsung on the battery, its really orginal equipment. Please its counterfeit! Imagine having a battery surge and ruining your 500 dollar phone because you wanted to save 25 bucks.

    This confirmed it for me, no 4.99 batteries and 3 dollar chargers. Destroy my 500 dollar phone so I could save 25 bucks? Thats not a gamble I'm willing to take.
  3. vuvision

    vuvision Well-Known Member

    Jan 1, 2010
    Topic is about touchscreen acting up because of higher output charger, what does this has anything to do with counterfeit battery? :thinking:

    I also have problem with the touchscreen using the USB from my laptop. Either the voltage is out of wack and/or there's lots of noise and might need a cable with ferrite bead filter. However, plugging straight to the power supply USB port, then everything is OK.
  4. howetechnical

    howetechnical Well-Known Member

    No offense, but by saying what you did, it is obvious that you don't understand battery cell technology. Providing an electrical current to a device is far different than storage and release of stored power. I used to be a battery pack engineer (designed custom battery packs for device makers like Sanyo, etc), and a surge really isn't an issue with a battery. Overheating, exploding, etc, now those are possible issues, but resistors these days (even the really cheap ones from Taiwan) regulat the output of a battery well enough to stop a surge from happening, especially on a pack this small.

    For the record, I did buy a two-pack of batteries and a battery charger as a deal on ebay for $14. When you are paying $30 for one battery at T-Mobile, you're not buying a better product, you're increasing their profits. It costs only a couple bucks to make a battery pack this small, including labor.
  5. Princesstechy

    Princesstechy New Member

    Aug 23, 2010
    The topic was about ebay chargers giving out higher voltage, also the ebay link showed fake batteries. :rolleyes:
    I agree with samvibe after having an ebay battery explode on me I never use ebay batteries chargers or car chargers.
  6. howetechnical

    howetechnical Well-Known Member

    This gives eBay a bad name. eBay is the site that vendors list their products on. You can buy name brand items as well as third party items on the site. For those that are reading this, she is referring to purchasing third party items on ebay, not authentic ones.
  7. shadow300z

    shadow300z Member

    Jul 21, 2010

    This topic has been discussed in numerous posts:


    Moral of the story: Stick with OEM when it comes to chargers. There are cheap Samsung OEM chargers on ebay for about $7 that do the job just fine.
  8. robo21

    robo21 Well-Known Member

    Jul 26, 2010
    So Cal
    I purchased OEM Samsung car charger on ebay for a fraction (1/3) of what Tmo wants for the identical charger - and no, it isn't counterfeit. Same thing with a data cable. The carriers make huge markups on accessories.

    Justin, do you think there is any danger of leakage with a cheapie battery? Is that even an issue with lithium ion batteries?
  9. jamesneutron

    jamesneutron New Member

    May 8, 2012
    aerospace & defense
    the oc
    sorry to bring an old post back from the dead, but i'm having this problem and i'm not using a generic cable or charger. i'm using the OEM samsung one from the tmo store, and i still get the problem. i literally have to unplug if i need to use my phone, and i'm SOL if it happens to be down to 5% life.

    any ideas?

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