The news has arrived from Amazon Germany where the Samsung Extended Battery Kit will be made available on January 5. According to the item's listing on Amazon.de, pricing is relatively consistent with earlier reports, coming in at €39.90. However there is no word yet on when or if we can expect to see worldwide availability.
The new Samsung Galaxy S III Extended Battery Kit gives you 1500 mAh more than the stock battery. The best thing is it doesn't add much thickness to the phones which remains relatively thick after the upgrade. To see the demonstration, click on the video and spin on to 1:10.