Prototypes of non-contact chargers have been cropping up lately, a new addition being this one by Seiko and Murata exhibited during the Embedded Technology 2008 convention in Japan.

The prototype is the black device you see on the image underneath the white block representation of a mobile gadget. Seiko Epson and Murata jointly developed the charging module that utilizes a lithium-ion battery to absorb and transmit electricity. Two modules sandwich the battery, one of which acts as the 15W power receiver (needed since the prototype is charged via non-contact means as well; see picture after the jump) and the other, as the 2.5W power transmitter.

Seiko and Murata's prototype is actually pretty much similar to Mojo Mobility's that was presented earlier this month. It's also designed for portable gadgets like cell phones, media players, and PDA, albeit this one seems to be able to charge just one gadget at a time, while Mojo Mobility's is created for simultaneous charging. Both, however, display the same transmission efficiency of 70 percent.