SGP needs micro-usb with data shorted to gnd to charge
Just like my Toshiba TG01, the SGP needs a micro-usb connection with the data pin shorted to ground in order to charge correctly. In the Samsung charger that comes with the US version, the charging cable is a straight micro-usb data connector, which means the charger must have the data pin shorted. This way, the cable itself can be plugged into the PC for data transfer. Personally, I have hacked up an adapter (female USB to male USB) which has the two pins shorted, so I can plug the adapter in-line with the data cable into any USB port that supplies a regulated 5V, and the SGP will charge. Otherwise, you need to make sure the charger has the proper implementation of the shorted data pins.