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Segment Information
 3 Months Ended
Dec. 31, 2012
Segment Information [Text Block]

18 Segment Information

The Company currently operates in one business segment, the manufacture, commercialization and distribution of a wide variety of standard and customized lithium ion rechargeable batteries for use in a wide array of applications. During the three months ended December 31, 2012, the Company manufactured five types of Li-ion rechargeable batteries: aluminum-case cell, battery pack, cylindrical cell, lithium polymer cell and high-power lithium battery cell as one line of business. The Company's products are sold to packing plants operated by third parties primarily for use in mobile phones and other electronic devices. Net revenues for the three months ended December 31, 2011 and 2012 were as follows:

Net revenues by product:                        
    Three months ended December 31,  
    2011     2012  
          %           %  
                         
Aluminum-case cell $ 34,250,788     47.73   $ 9,316,537     14.62  
Battery pack   20,838,921     29.04     22,436,790     35.21  
Cylindrical cells   12,972,890     18.08     19,599,545     30.75  
Lithium polymer cells   2,633,669     3.67     6,935,483     10.88  
High-power lithium battery cells   1,058,689     1.48     5,444,006     8.54  
                         
  $ 71,754,957     100.00   $ 63,732,361     100.00  

Net revenues by geographic area:                    
    Three months ended December 31,  
    2011     2012  
          %           %  
                         
PRC Mainland $ 58,773,767     81.91   $ 48,994,581     76.88  
PRC Taiwan   6,521,674     9.09     5,808,968     9.12  
India   2,534,635     3.53     3,055,888     4.79  
Hong Kong, China   2,410,783     3.36     3,997,372     6.27  
Others   1,514,098     2.11     1,875,552     2.94  
                         
  $ 71,754,957     100.00   $ 63,732,361     100.00  

Substantially all of the Company’s long-lived assets are located in the PRC.