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China BAK Battery, Inc. (Parent Company) (Narrative) (Details)
 12 Months Ended
Sep. 30, 2015
USD ($)
China Bak Battery, Inc. (parent Company) 1 10.00%
China Bak Battery, Inc. (parent Company) 2 50.00%
China Bak Battery, Inc. (parent Company) 3 25.00%
China Bak Battery, Inc. (parent Company) 4 $ 15,250,000
China Bak Battery, Inc. (parent Company) 5 $ 15,250,000
China Bak Battery, Inc. (parent Company) 6 50.00%
China Bak Battery, Inc. (parent Company) 7 0
China Bak Battery, Inc. (parent Company) 8 $ 15,769,742
China Bak Battery, Inc. (parent Company) 9 25.00%