But if you'd read/quoted my full comment (see below) then you'll see I covered that... plus with Sony eReaders, it is obvious that they can accept whatevers avaialble within their range. They get 500mA from a computer USB socket but charge at 2A from an external PSU (or, indeed 500mA... just takes longer)...
Previous Post: You don't pump wattage into anything, a device draws as much current as it needs... it's voltage that's crucial.
A PSU that supplies 5V and has 10A available will still only supply what a device requires... if it's 2A then that's what it'll take, if 500mA then the same but if 15A then it'll take 10A and whilst it might want another 5A, it won't get them. It'll either burn out the PSU or, more likely with overload protection being common, just get the 10A (or it could just shut the PSU down) but you don't get 10A flooding into a device that needs 2A...
Quote:
Originally Posted by mwheinz
But the device can only draw as much current as the source can provide. A device that needs 2A isn't going to get that from a 500mA AC charger.
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