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Deferred Revenue (Narrative) (Details) In Millions, unless otherwise specified | 9 Months Ended
--- | ---
Jun. 30, 2014 USD ($) Y | Jun. 30, 2014 CNY
Deferred Revenue 1 | $ 9 |
Deferred Revenue 2 |  | 56
Deferred Revenue 3 | 35 | 35

X
- Definition Deferred Revenue 3 + References No definition available. + Details
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Period Type: | duration

X
- Definition Deferred Revenue 2 + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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X
- Definition Deferred Revenue 1 + References No definition available. + Details
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Namespace Prefix: | cbak_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
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