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Deferred Revenue and Other Long-term Payables (Narrative) (Details)	6 Months Ended
	Mar. 31, 2013 Y
Deferred Revenue And Other Long-term Payables 1	35

X

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Deferred Revenue And Other Long-term Payables 1

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