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Concentrations and Credit Risk (Tables)
 9 Months Ended
Sep. 30, 2025
Concentrations and Credit Risk [Abstract]  
Schedule of Concentration Risk

The Company had the following customers that individually comprised 10% or more of net revenue for the three months ended September 30, 2024 and 2025 as follows:

 

   Three months ended September 30, 
Sales of finished goods and raw materials  2024   2025 
Customer A  $8,581,026    19.2%  $*    * 
Customer B   9,061,625    20.3%   *    * 
Customer C   *    *    10,439,859    17.1%
Zhengzhou BAK Battery Co., Ltd   5,166,670    11.6%   *    * 

The Company had the following customers that individually comprised 10% or more of net revenue for the nine months ended September 30, 2024 and 2025 as follows:

 

   Nine months ended September 30, 
Sales of finished goods and raw materials  2024   2025 
Customer A  $15,584,538    10.3%  $17,671,320    13.0%
Customer B   57,550,494    38.1%   *    * 

 

* Comprised less than 10% of net revenue for the respective period.

 

The Company had the following customers that individually comprised 10% or more of net trade receivable (included VAT) as of December 31, 2024 and September 30, 2025 as follows:

 

   December 31, 2024   September 30, 2025 
Customer A  $10,676,044    41.5%  $3,050,845    12.5%
Zhengzhou BAK (note 17)   5,970,184    23.2%   5,615,672    23.0%

 

* Comprised less than 10% of net accounts receivable for the respective period.

 

The Company had the following suppliers that individually comprised 10% or more of net purchase for the three months ended September 30, 2024 and 2025 as follows:

 

    Three months ended September 30,  
    2024     2025  
Supplier A   $ *       *     $ 9,086,462       19.9 %
Supplier B     *       *       5,277,642       11.6 %
Supplier C     3,504,195       11.9 %     *       *  
Supplier D     3,548,023       12.0 %     *       *  

 

The Company had the following suppliers that individually comprised 10% or more of net purchase for the nine months ended September 30, 2024 and 2025 as follows:

 

    Nine months ended September 30,  
    2024     2025  
Supplier A   $          *                *     $ 15,640,546       13.6 %
Supplier B     *       *       11,685,407       10.2 %

 

%*Comprised less than 10% of net purchase for the respective period.

 

The Company had the following suppliers that individually comprised 10% or more of trade payable as of December 31, 2024 and September 30, 2025 as follows:

 

   December 31, 2024   September 30, 2025 
Supplier A  $*    *   $6,886,452    14.1%
Supplier B   *    *    5,766,916    11.8%
Supplier D   3,263,562    12.4%   *    *