Quote:
Originally Posted by Emma Santiago
If you multiply amph to volts then you will get Watts. higher Watts means shorter charging time but if device supports otherwise your device will be damaged...
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Not quite correct.
It's true that A * V = W, but while voltage is much like water pressure in that is is forced on the device, amperage is like flow rate (gallons per hour) and the device is not "obligated" to use the full current.
Some devices, rather few these days, do rely on the charger to be the limiting device. These will consume whatever amperage the charger allows and when used with a charger that offers higher current levels will "over eat", which can damage the device. Most devices have their own current limiters and will only draw the amount of current that they were designed for regardless of the charger's capacity.