Concentrations and Credit Risk (Tables)

6 Months Ended

Jun. 30, 2019

Concentrations and Credit Risk [Abstract]

Schedule of revenue by major customers by reporting segments

	Three months ended June 30,
	2018				2019
Customer A	$	2,540,634	41.99	%	$	2,633,652	61.66	%
Customer D		1,469,592	24.29	%		*	*
Shenzhen BAK		*	*			769,052	18.01	%

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

	Six months ended June 30,
	2018				2019
Customer A	$	3,702,680	39.55	%	$	3,875,327	41.04	%
Customer D		1,474,860	15.75	%
Customer E		*	*			1,527,998	16.18	%
Customer F		*	*			1,066,260	11.29	%
Customer G		*	*			1,025,998	10.87	%

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

Schedule of accounts receivable by major customer

	December 31, 2018				June 30, 2019
Customer A	$	1,769,416	11.49	%	$	2,791,799	18.47	%
Customer B		4,283,023	27.82	%		4,290,917	28.38	%
Customer C		2,293,257	14.89	%		2,362,341	15.63	%

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

Schedule of transactions with the former subsidiaries

	Three months ended June 30,				Six months ended June 30,
	2018		2019		2018		2019
Purchase of inventories from
Shenzhen BAK	$	111,548	$	65,102	$	111,548	$	65,102
Zhengzhou BAK Battery Co., Ltd*		2,116,111		-		2,116,111		-
Sales of finished goods to
BAK Tianjin		17,457		-		27,537		-
Shenzhen BAK		-		685,211		-		769,052

* Mr. Xiangqian Li, the former CEO, is a director of this company.