http://forum.lowyat.net/index.php?showtopic=2436492&hl= 

Note : Battery NOT included

Note : S3 with extended battery inside the phone can slot in and be charged by cradle. 
Note : However, the extended battery itself is too big for the extended battery

This is the Samsung Galaxy S3 i9300 III cradle docking station with an extra slot for charging another battery

Suitable for S3 owner who are are hungry for more juice within a short period of time

Hurry and grab 1 now

COD (NO extra charge) : SS3 Shell, Taman Bahagia LRT, Kelana Jaya Post office

3 months warranty

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Detailed Product Description

1) Data HotSync and battery charging on your desk with a cradle.

2) Europe plug wall adapter for direct charging

3) Blue LED indicator 

4) Specifications:
(1) Net Weight : 86g 
(2) Dimension : 82 x 66 x 26 mm
(3) OUTPUT: DC 5V 1000mA (if charge battery & phone at the same time, each will be 500mA)