|It is a 4.5mm thin portable battery for your phone. Gokuusu portable battery, a 4.5mm ultra-thin business card sized 1,000mAh lithium ion portable battery that has an in-built memory of 4GB for storage purpose. The connection is done through a retractable USB cable and a set of tiny adaptors for whatever phone you carry. Made from aluminum material, the battery charges-up in 3 hours time and provides an output of 5V, 600mA for charging up your gadgets. It will cost 2,980 Yen ($ 30).
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