Originally Posted by KlaymenDK
That is not the cable's fault -- more likely, it must be a 'dumb' charger. USB devices per default get 100mA from the host, but can request to get the full 500mA. When you plug your phone into a pc, it should be able to negotiate for that, but some (esp. car) chargers don't 'listen' to the USB. So if your phone consumes ~100mA at idle, there's your reason.
I have a usb charger from iPhone and a usb charger from Sony Ericsson X1, neither can be used to charge my galaxy (via the usb cable come from my galaxy).
So it's not that galaxy can't be charged from a usb charge, just the 2 chargers I used isn't good enough? anyone can recommend some usb chargers that work with galaxy? the amazon one isn't available now.