Quote:
Originally Posted by henson0115
all usb chargers should be 5v in the uk(not sure in other countrys but should still be the same), its also what usb runs on in a computer (5v rail..)so they all WILL work fine.. the only exception is where the put special circuitry in the PLUG. i would however stay away from dual usb chargers running from a usb slot if it isnt powered, there are many sites out there that explain why(google is your friend). sometimes they wont even work at the wall. why? well because the plug is giving you 5v and each device requires 5v duh, pretty simple. google is your friend.
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Once more... it is the current that counts... yes all USB is 5V but what makes unpowered unreliable is that each device requires a minimum amount of CURRENT... usually at least 500mA (0.5A) for an eReader but this is a minimum and some USB PSUs will supply more which allows a device to take as much as it needs (it cannot take too much if more than enough is available) and means faster charging as well...
