EXHIBIT 10.15


Summary of Guaranty  Contract of Maximum Amount by and among Longgang  Division,
Shenzhen  Branch,  China  Minsheng Bank,  Jilin  Provincial  Huaruan  Technology
Company  Limited by Shares  ("Huaruan  Company")  and  Xiangqian  Li dated as of
November 15, 2003.

         Huaruan Company and Xiangqian Li signed a guaranty on November 15, 2003
in relation to the Comprehensive  Credit Facilities  Agreement (the "Agreement")
as  summarized  in  Exhibit  10.14.  According  to  the  guaranty,  each  of the
guarantors undertakes to assume joint and several liabilities for the obligation
of Shenzhen BAK Battery Co., Ltd.  under the  Agreement,  subject to the maximum
security  amount of RMB  30,000,000  Yuan.  The  guaranty  has a term of two (2)
years, commencing from the maturity of each loan agreement under the Agreement.