Thanko offers in Japan the CREXP2BK radle for Sony Ericsson’s XPERIA X10. Not only docks the XPERIA X10, the CREXP2BK comes with a back cover for the phone with integrated battery. Simply change the back cover, the X10 can be recharged when it is docked. The battery has 1500mAh capacity.
Thanko’s CREXP2BK XPERIA cardle uses USB for power. It is priced at 3980 Yen.