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Revenue - Schedule of Composition of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Revenue	$ 7,855	$ 2,798	$ 13,536	$ 5,109
Total revenue from customers
Disaggregation of Revenue [Line Items]
Revenue	7,555	2,798	13,236	4,847
Sale of battery products
Disaggregation of Revenue [Line Items]
Revenue	6,055	2,194	11,736	3,956
Customization design services
Disaggregation of Revenue [Line Items]
Revenue	1,500	604	1,500	891
Other revenue – government grants
Disaggregation of Revenue [Line Items]
Revenue	$ 300	$ 0	$ 300	$ 262

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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