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Thread: Working Aftermarket Charger Thread

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    Soundwave
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    Working Aftermarket Charger Thread

    Has anyone found a brand of charger that will actually work as well as the factory charger? I know that this question has been asked many times here, but I haven't found a definitive answer yet, so I decided to start a dedicated thread on the subject. For instance, has anyone tried this one from Amazon with 2.4A and 12W? http://www.amazon.com/PowerGen-2-4-A...ds=usb+charger. On paper, this sounds like it should work, but some of the reviewers said that it was incompatible with older transformers.

    I need a couple extra chargers, so I'd appreciate anyone's personal experience here. The 3 chargers I have lying around my place haven't worked at all. Thanks.

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    Ratchet
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    Great idea for a thread. I hope we compile some useful info here. I found this customer image of the user guide from the white version of that charger: Amazon.com: PowerGen White 2.4-Amp (12 Watt) Dual USB Wall Charger w/Sviwal Plug Designed for Apple and Android Devices: Cell Phones & Accessories

    http://ecx.images-amazon.com/images/I/61jZYO-6yYL.jpg - notice it specifically says "NOT compatible with Asus Transformer"

    I also know from personal experience that this doesn't work even though it's 2.1A: Amazon.com: GE 14096 10-Outlet Surge Protector with 2 USB Charging Ports GE 14096 10-Outlet Surge Protector wit: Electronics

  3. #3
    Soundwave
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    I would Say the Amazon.com ones with the DUAL USB probably will not work as they are a combined 2.4 amp (see detailed specs: Input:100-240V 150mA ; OutputC 5V 2.4A Max. or 12W (A combined total of Max. 2.4A) As for the Surge protector i'm gonna say probably not... I would venture to guess that any USB 3.0 charger should work.... But I have yet to test, That being said, I have a friend with a note 3 charger... has the same amp/watts as my OEM... I'm going to see if they work. If so we might be able to search for a replacement charger for a Note 3 to get proper amps/watts... Ill let you know

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    What I am going to say makes a couple of assumptions as I have not seen the t100 charger. I guess that the tablet end connector is different from the previous Transformer devices, but assuming the charger itself has the same/similar specs as previous models then the issue will be getting a charger that outputs at the correct voltage which has previously been 15v.

    In electrical terms, any charger will work as long as it has...
    1) the correct (ie identical to the Asus supplied) output voltage and
    2) an amperage of either equal to or greater than the Asus supplied charger

    The amperage can be greater because the t100 will only draw the current it is designed to draw. The voltage must be the same as if it is less, the t100 may not charge at all (or very slowly). If it is greater, then your device will be damaged - and that damage will not be covered by the warranty.

    So, check the voltage & amperage figures on the official t100 charger & then buy an aftermarket charger that matches those figures.

    Hope that helps
    Last edited by janner43; 11-23-2013 at 02:59 AM.

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    Quote Originally Posted by janner43 View Post
    So, check the voltage & amperage figures on the official t100 charger & then buy an aftermarket charger that matches those figures.
    That's what I thought too, but unfortunately it's not that simple. The Output specs on the charger state 5V/2A. I tried a charger that said it could provide that to a single USB port, and guess what--it couldn't keep up with the device discharge rate.

    Someone needs to dissect this charger and figure out what makes it so special.


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    Quote Originally Posted by ilovetofu View Post
    That's what I thought too, but unfortunately it's not that simple. The Output specs on the charger state 5V/2A. I tried a charger that said it could provide that to a single USB port, and guess what--it couldn't keep up with the device discharge rate.

    Someone needs to dissect this charger and figure out what makes it so special.
    I can see from your posting of the charger that the output from the charger is measured at 2amps / 5volts, so now we know that, then your were correct in your original assumption that a charger that outputs at those levels will charge the device.

    But - here's the thing - not all chargers are created equal. Some are built well - some, not so well. If you have tried a charger that "claims" it can output at those levels, but doesn't successfully charge the device, then I would likely suspect that the aftermarket charger isn't up to its stated specifications.

    Electrically speaking, if the charger supplied is a USB socketed 5v/2a one, then I know of no reason why any USB output that was correctly supplying 2 amps at 5 volts wouldn't work.

    Of course, that brings us back to the eminently sensible reason for your thread - "Has anyone found a brand of charger that will actually work as well as the factory charger? "

    Let's hope that someone comes up with one that they are happy with.

    PLEASE Search for existing threads before posting a new one. Thanks.

    Your opinion matters. But should you disagree - please try not to be disagreeable

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    Breaking news! I found a working combo. I haven't tested it much, but I actually just got this charger to work. Amazon.com: iXCC Dual USB 20W 4.2A Black High Capacity FAST AC Travel Wall Charger for iPad, iPhone, and iPod - 2 Port High Speed Charging for Apple iPad Air, iPad 5, iPad 4, New iPad 3, iPad 2 / Apple iPhone 5s, iPhone 5c, iPhone 5, iPhone 4s, iPh

    With this cable:
    Amazon.com: PortaPow Specialised 5ft 24AWG Charge Only Micro USB Cable for Blackberry, Xperia, HTC One, Google Nexus, Other Fast Charging Devices: Electronics

    So far it has only charged the tablet 2% but I got so excited I had to post this info...lol. Anyway, I'll keep you updated about the long term success, etc.

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    Soundwave
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    Quote Originally Posted by smallfu View Post
    Breaking news! I found a working combo. I haven't tested it much, but I actually just got this charger to work. Amazon.com: iXCC Dual USB 20W 4.2A Black High Capacity FAST AC Travel Wall Charger for iPad, iPhone, and iPod - 2 Port High Speed Charging for Apple iPad Air, iPad 5, iPad 4, New iPad 3, iPad 2 / Apple iPhone 5s, iPhone 5c, iPhone 5, iPhone 4s, iPh

    With this cable:
    Amazon.com: PortaPow Specialised 5ft 24AWG Charge Only Micro USB Cable for Blackberry, Xperia, HTC One, Google Nexus, Other Fast Charging Devices: Electronics

    So far it has only charged the tablet 2% but I got so excited I had to post this info...lol. Anyway, I'll keep you updated about the long term success, etc.
    Update: It charged the T100 up to 100%, even while I was using the device. And it seems just as fast as the stock charger to me...
    ilovetofu likes this.

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    Quote Originally Posted by smallfu View Post
    Update: It charged the T100 up to 100%, even while I was using the device. And it seems just as fast as the stock charger to me...
    Thanks. I think we have some key info here: Amazon.com: mykehorn's review of PortaPow Specialised 5ft 24AWG Charge Only...

    "The rub is the charger doesn't decide how much electricity to send, but rather the device itself that PULLS electricity from the AC plug or USB port. All Android-based devices will limit the energy draw to a maximum of about 500mA (or of a full Amp) when connected to a USB port. Most aftermarket chargers follow the USB data standard that includes 4 "pins" within a connector - 2 for power-charging and 2 for data-transfer (meaning your device recognizes it as a USB port); whereas most OEM chargers usually have the data pins "shorted" so the device sees only charging pins, thus indicating a power-charger and allowing itself to draw the maximum current. It's fairly complicated and counter-intuitive at first, and it took me a long time to find out why my devices were charging so slowly on a supposedly fast after-market charger. This is demonstrable by the very chargers Amazon itself sells... the Amazon Kindle 9W PowerFast Adapter for Accelerated Charging costs more - but you'll only get up to 1.8A output no matter which cable used since they have effectively killed the data pins on the charger; whereas they also sell the better value AmazonBasics Wall Charger with USB Outlet (2.1 Amp Output) with its higher output, but it has all 4 USB pins intact - so unless you have a charging-only cable the most you will ever draw at any time from it is around 500mA. You absolutely need a good charging-only cable to take advantage of the faster speed provided by the higher output of most aftermarket chargers."
    themorn2112 likes this.

  10. #10
    Ratchet
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    Here are a couple more links on USB charging:

    The Basics of USB Battery Charging: A Survival Guide - Tutorial - Maxim
    Motorola?s USB charging scheme Nerd Fever

    This stuff is too complicated.

 

 
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