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Deferred Revenue (Narrative) (Details)	9 Months Ended
	Jun. 30, 2013 Y
Deferred Revenue 1	35

X

- Definition

Deferred Revenue 1

+ References

No definition available.

+ Details

Name:	cbak_DeferredRevenueZeroOneSevenZeroSixTwoOneSevenFourThreeZSevenTdTNNineXNsX
Namespace Prefix:	cbak_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration