Don't make the same Invisishield mistake that I made...


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  1. hansangb

    hansangb Well-Known Member This Topic's Starter

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    so I have the invisisheield on my PSPs, my old LD Dare etc. I really like the silky smooth glass touch of the Droid, but the piece of mind that Invisishield brings is worth it to me.

    So I applied it last night and turned it on this morning. And I *FREAKED* the touch screen was acting all wacky. I couldn't even get the "connect the dot" lock screen to work. I was in a panic thinking I damaged it somehow or the Invisishield is interfering with the touch screen. So I peeled it off like a bandaid. No issues with any residue by the way.

    Tonight, the touch screen was acting all weird again and I thought I had damaged it somehow. Well, it turns out that AFTER MARKET chargers don't have enough mA. And it makes the screen go all wacky.

    I just *HAPPENED* to have the charger connected when I first tried it with the Invisishield.

    Oh well, looks like I'll have to order a new one.
     

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  2. ocean1

    ocean1 Well-Known Member

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    So it was the charger
    NOT the invisisheild?
     
  3. Droidood

    Droidood Well-Known Member

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    Uh... no clue what you're talking about. You think a charger wasn't capable of supplying enough power and that caused the sensitivity on your screen to change?
     
  4. GrandMasterB

    GrandMasterB Go Go Gadget Flow! VIP Member

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  5. icstars989

    icstars989 Well-Known Member

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    Nice plug!
     
  6. GrandMasterB

    GrandMasterB Go Go Gadget Flow! VIP Member

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    I already reported him. I dont think we will be seeing much of him anymore :D
     
  7. pismo874

    pismo874 New Member

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    I agree on the after market power. Over night my Droid started dialing 1's and 7's on the keypad. As soon as I unplugged the power it stopped. I also find when I go to check something with the power plugged in the screen doesn't always respond correctly. I bought my after market AC charger on eBay. I thing I will stop by a Verizon store and buy one from them. (Need 2 as the 2nd one is for my RV)
     
  8. shadowdude777

    shadowdude777 Well-Known Member

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    I don't see how not enough current can cause things to happen out of nowhere.

    The Droid charger is rated at 5.1V 850mA. You want to aim for as close to this as possible. I tried using a 5.1V 700mA charger with the Droid and all that happened was the charger got hot. Probably because the Droid was pulling more than the charger was rated for. If you use more current than the Droid is rated for, then the battery might heat up as its resistors try to dissipate the extra energy, or the battery might get damaged if it doesn't have protection circuitry, which it almost definitely does.

    I'm willing to bet the problem lies in the voltage. I could see an unexpected voltage increase to the Droid causing stuff to go out of wack, especially considering the capacitive touchscreen senses electric currents.
     
  9. Chugworth

    Chugworth Well-Known Member

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    Wait a second now, the USB ports on a computer only supply 5.0V 500mA. That's what the USB standard is rated for. My DROID acts fine when I charge it from my computer.
     
  10. hansangb

    hansangb Well-Known Member This Topic's Starter

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    Plug of what? Like others posted, I'm not the first to have this happen to me. In my case, I just happened to have applied the Invisishield and freaked out. If you have an older USB charger around, give it a try.
     
  11. hansangb

    hansangb Well-Known Member This Topic's Starter

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    Are you guys talking about me? As if I have nothing better to do than plug a $11 product? Puhlease. I posted it so others won't suffer a similar issue.
     
  12. rvonder

    rvonder Well-Known Member

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    In fact, I experienced something similar on my Droid. It had been working perfectly, and I charge it only via my USB port (not a hub) or with the supplied charger. One afternoon I hit the power button and found the unit totally dead - very surprising since it had been fully charged only a couple hours earlier.

    So I plugged it into the official AC charger, and it started to reboot. But it seemed to take a very long time to reboot, and when the home screen finally appeared, it was going crazy. Almost like it had a mind of its own, it was rapidly opening apps, randomly dialing contacts, etc. Nothing I pressed would stop it. After a couple battery-out reboots, I finally got it to settle down -- only to find that the "back" button no longer worked at all. Everything else seemed normal, although the q, a, and z keys also on the far-left side of the soft keyboard didn't work either.

    I couldn't find anything in terms of software or settings that might cause this, and the screen continued to freak out randomly every so often. Pulling the battery was the only fix when this happened. I finally ended up taking it back to Verizon, and they replaced it with a brand-new phone. I restored the exact same configuration from my SD card (thank goodness for MyBackup Pro!), and have had no problems with the new one so far.

    But all these stories make me wonder if there's some basic design defect with the Droid?
     
  13. kmfdmk

    kmfdmk Well-Known Member

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    Umm sort of. Bolded corrections to your post.

    Charger will heat up if it isn't rated for the same amperage that the OEM charger is rated for. Battery doesn't have protection circuitry, the phone has circuitry that monitors battery charge state and turns off charging the battery once full.



    You need to match the voltage exactly, and you need to meet or exceed the mA (milliAmpere, power) rating. Voltage is the potential to do work, and the amperage is the flow of power. Matching the voltage (5.1volts) and using a charger that doesn't meet the amperage rating means that the phone, during use and charging will try to pull, or flow more power than the adapter/charger can supply. This is why the charger will get hot and overheat. Sure you might slide by, but it also can lead to instable voltage outputs which can damage your phone. That's probably what the culprit was in this case.

    Anyone recall instable voltage outputs when overclocking CPU's and cranking out too much heat?? Same thing going on here.

    Moral of the story. Match the Voltage (5.1Volts) Meet or Exceed the 850mA rating. (which is .850 Amps) and you'll be fine.
     

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