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  1. Thread Author  Thread Author    #1  

    Default 2 amp charger

    I've been hearing a lot about these 2 amp chargers charging devices really really fast. I heard them talking about it on the podcast also but I was wondering if they were safe to use with this device? If so I'm gonna purchase a few. I don't want to damage my new battery so that's why I'm posting this. Thanks.

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  2. #2  

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    I know other batteries can be damaged if you charge them too fast and the battery gets too hot. I would stick with the one that came with the phone to be safe.


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  3. #3  
    jaltman's Avatar

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    Theoretically, its the battery that has the regulator. The 2 amp rating of the charger speaks to its capacity and not what it will actually charge at. If the battery charges too fast or too hard, it should be the battery's fault, not the charger. This is not to say that the battery you are charging is not poorly regulated and needs the more limited power of the 1 amp charger to stay in spec.

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  4. #4  

    Default Re: 2 amp charger

    To amplify the previous, while the charger may supply up to 2A, if the phone only draws 700mA that is all it is going to draw.

    Also, a lot of 2A chargers are designed for iDevices and their weird way of the charger signaling to the device that it is ok to draw max power. Absent fairly specific voltages on the data lines iDevices will either assume they are connected to a computer and only draw 500mA, or they won't charge at all (I know some newer macs have higher power USB ports but lets ignore that for now). However, most non-iDevices simply look for the two data lines to be shorted together to let them know they are connected to a dedicated high power charger and not a computer. That means that most non-iDevices will not recognize 2A chargers that are designed for Apple products as being high-power and so the phone will only draw 500mA even hooked up to a 2A charger.
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    How many amps does the galaxy s3 draw out? I want to charge the phone in the fastest way possible.
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  6. #6  

    Default Re: 2 amp charger

    Quote Originally Posted by camiller View Post
    To amplify the previous, while the charger may supply up to 2A, if the phone only draws 700mA that is all it is going to draw.

    Also, a lot of 2A chargers are designed for iDevices and their weird way of the charger signaling to the device that it is ok to draw max power. Absent fairly specific voltages on the data lines iDevices will either assume they are connected to a computer and only draw 500mA, or they won't charge at all (I know some newer macs have higher power USB ports but lets ignore that for now). However, most non-iDevices simply look for the two data lines to be shorted together to let them know they are connected to a dedicated high power charger and not a computer. That means that most non-iDevices will not recognize 2A chargers that are designed for Apple products as being high-power and so the phone will only draw 500mA even hooked up to a 2A charger.
    Hear... Hear... Well said!

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