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China BAK Battery, Inc. (Parent Company) (Narrative) (Details) (USD $) | 12 Months Ended
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Sep. 30, 2012
China Bak Battery, Inc. (parent Company) 2 | 10.00%
China Bak Battery, Inc. (parent Company) 3 | 50.00%
China Bak Battery, Inc. (parent Company) 4 | 25.00%
China Bak Battery, Inc. (parent Company) 5 | $ 81,866,049
China Bak Battery, Inc. (parent Company) 6 | 50.00%
China Bak Battery, Inc. (parent Company) 7 | $ 7,645,303
China Bak Battery, Inc. (parent Company) 8 | 5.00%

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- Definition China Bak Battery, Inc. (parent Company) 5 + References No definition available. + Details
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Namespace Prefix: | cbak_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

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- Definition China Bak Battery, Inc. (parent Company) 8 + References No definition available. + Details
Name: | cbak_ChinaBakBatteryIncparentCompanyZeroOneZeroSevenSixOneFourSevenEightfhxqfLdSixyFivepZ
Namespace Prefix: | cbak_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition China Bak Battery, Inc. (parent Company) 4 + References No definition available. + Details
Name: | cbak_ChinaBakBatteryIncparentCompanyZeroOneZeroSevenSixOneFourSevenEightkzGNGGWbXzQc
Namespace Prefix: | cbak_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition China Bak Battery, Inc. (parent Company) 6 + References No definition available. + Details
Name: | cbak_ChinaBakBatteryIncparentCompanyZeroOneZeroSevenSixOneFourSevenEightNpKEightbZQqtftw
Namespace Prefix: | cbak_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition China Bak Battery, Inc. (parent Company) 7 + References No definition available. + Details
Name: | cbak_ChinaBakBatteryIncparentCompanyZeroOneZeroSevenSixOneFourSevenEightOneWkCMkhqrlPC
Namespace Prefix: | cbak_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition China Bak Battery, Inc. (parent Company) 2 + References No definition available. + Details
Name: | cbak_ChinaBakBatteryIncparentCompanyZeroOneZeroSevenSixOneFourSevenEightrSevenNSeventNxZSixkZSeven
Namespace Prefix: | cbak_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition China Bak Battery, Inc. (parent Company) 3 + References No definition available. + Details
Name: | cbak_ChinaBakBatteryIncparentCompanyZeroOneZeroSevenSixOneFourSevenEightTGdmWzbPOneZerofk
Namespace Prefix: | cbak_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration