Document:

Exhibit 10.20

                                                                         Summary
                                                                         -------

Summary of Guaranty  Contract of Pledge by and between Shenzhen BAK Battery Co.,
Ltd. and Longgang Branch, Shenzhen Development Bank dated May 15, 2005

Main contents
>>   Contract number: Shenfa Longgang zhi zi NO.20050518002;
>>   As  guarantor,  the Company has  pledged a one-year  term  deposit of RMB50
     million to Development Bank as collateral to secure its indebtedness  under
     Loan  Agreement  5 which  include  the loan  principal,  interest,  penalty
     interest,  expenses for Development Bank to realize its creditor's  rights,
     and loan principal secured is RMB 47.5 million.
>>   After the Company has pledged the term deposit as collateral, it should not
     transfer  or permit any third party to use such  deposit  without the prior
     written consent of Development Bank.
>>   Guaranty Contract is irrevocable and independently effective.

Terms  that  have  been  omitted:   disposal  of  the  collateral  by  creditor;
undertakings  and  representations  of pledger;  independence  of the  contract;
expenses  and  service  charges;  amendment  and  termination  of the  contract;
applicable law and dispute  settlement;  effectiveness  and  registration of the
collateral; validity; and statement of collateral status.Exhibit 10.21

                                                                         Summary
                                                                         -------

Summary of  Comprehensive  Credit  Facility  Agreement of Maximum Amount between
Shenzhen BAK Battery Co., Ltd. and Shenzhen  Branch,  China  Minsheng Bank dated
March 17, 2005.

Main contents
>>   Contract number: 2005 Shen Binhai Zong'e Zi NO.006;
>>   Maximum amount for credit facilities to be provided: RMB 40 million;
>>   Purpose: Working capital;
>>   Term: from March 17, 2005 to March 17, 2006;
>>   Minsheng  Bank is  entitled  to adjust  or cancel  the  credit  and  demand
     immediate  payment  of  the  loan  if  the  Company's  business  operations
     deteriorates severely, the Company loses its business reputation,  there is
     a  dispute  between  the  Company  and  Minsheng  Bank or  there is a major
     adjustment of the state monetary policy.

Terms that have been  omitted:  types of the line of credit;  use of the line of
credit; guarantee of the line of credit; commitment of the borrower;  commitment
of the lender; effectiveness; and dispute settlement.Exhibit 10.22

                                                                         Summary
                                                                         -------

Summary of Loan  Agreement  between  Shenzhen BAK Battery Co., Ltd. and Shenzhen
Branch, China Minsheng Bank dated March 17, 2005.

Main contents:
>>   Contract number: Year (2005) (Shen Binhai Zongdai) Zi No.021;
>>   Loan principal: RMB 40 million
>>   Loan term: from March 17, 2005 to March 17, 2006;
>>   Purpose: working capital;
>>   Interest rate: 5.022%;
>>   Repayment:  interest is payable monthly (20th);  principal is due March 17,
     2006;
>>   Breach of contract: Minsheng Bank is entitled to charge penalty interest if
     the Company defaults in repayment.  The Company is also liable for Minsheng
     Bank's expense such as litigation fee, legal fees,  traveling  expenses and
     other expense incurred due to the Company's breach of contract.

Terms that have been omitted:  term type of the loan;  calculation method of the
loan interest; drawing of the loan; repayment of the loan; guarantee; rights and
obligations of the contracting parties; effectiveness; amendment and termination
of the contract; dispute settlement;  miscellaneous;  validity; understanding of
the contract; and attention.Exhibit 10.23

                                                                         Summary
                                                                         -------

Summary of  Comprehensive  Credit  Facility  Agreement of Maximum Amount between
Shenzhen BAK Battery Co.,  Ltd. and Shuibei  Branch,  Shenzhen  Commercial  Bank
dated April 22, 2005.

Main contents
>>   Contract number: Shen Shang Yin Shuibei Shouxin Zi No.A110020500006;
>>   Maximum amount for credit facilities to be provided: RMB 50 million;
>>   Term: from April 22nd, 2005 to April 22nd, 2006;
>>   Interest rate of loan shall be the base rate announced by the People's Bank
     of China less 10%;
>>   Adjustment  of credit can be made by the  Commercial  Bank under the any of
     the  following:
     |X|  The Company suffers severe operational risk or its financial situation
          severely deteriorates;
     |X|  Guarantor's  payment ability is obviously weakened or value of pledged
          collaterals decreases obviously;
     |X|  Occurrence of other  instances  which make the  Commercial  Bank think
          adjustment of credit facility is necessary;
>>   Breach of contract  penalty:  adjustment of credit,  cancellation of unused
     credit,  imposition  of punitive  interest,  demand  prepayment of loan and
     other measures;
>>   Special terms:
     |X|  Comprehensive  Agreement 3 shall  replace the  previous  comprehensive
          agreement  signed in 2005 with the  Commercial  Bank with the contract
          number of Shen Shang Yin Shuibei Shouxin Zi No NO.A110020500001;
     |X|  As RMB16.64  million is already used under the previous  comprehensive
          agreement in the form of banker's  acceptance  bill, such amount shall
          be deemed to have been used  under the credit  lines of  Comprehensive
          Agreement 3.  Consequently,  before  maturity of the RMB16.64  million
          banker's acceptance bill or guarantee bond of such amount is provided,
          credit  line that the  Company is  entitled  to use shall be  RMB33.36
          million;
     |X|  Credit line under  Comprehensive  Agreement 3 can only be used to open
          L/C for import of equipments and open banker's acceptance bill.
     |X|  All credit  provided under  Comprehensive  Agreement 3 shall expire on
          April 22nd, 2006

Terms  that  have  been  omitted:  types of line of  credit;  use of the line of
credit;  repayment  of the loan  under  the  line of  credit;  undertakings  and
representations of the borrower;  miscellaneous;  integrity;  applicable law and
dispute settlement; effectiveness; and validity.Exhibit 10.24

                                                                         Summary
                                                                         -------

Comprehensive  Credit  Facility  Agreement of Maximum Amount Entered Between the
Company and Agricultural Bank

Summary of the main contents

>>   Contract number: (Shenzhen Longgang Nongyin Shouzi No.20050237000;
>>   Maximum amount for credit facilities to be provided: RMB50 million;
>>   Term:  from July 29th,  2005 to January 29, 2006;  >> Interest rate of loan
     shall be subject to each loan agreement/contract to be signed;
>>   Purpose: Working capital;
>>   Adjustment of credit can be made by Agricultural  Bank under the any of the
     following:
     |X|  The Company suffers severe operational risk or its financial situation
          severely  deteriorates;
     |X|  Guarantor's  payment ability is obviously weakened or value of pledged
          collaterals decreases obviously;
     |X|  Occurrence  of other  instances  which  make  Agricultural  Bank think
          adjustment of credit facility is necessary.
>>   Breach of contract  penalty:  adjustment of credit,  cancellation of unused
     credit,  imposition  of punitive  interest,  demand  prepayment of loan and
     other measures;
>>   Special  terms:  This  line of  credit is added on the basis of the line of
     credit of 200 million yuan.

Terms  that have been  omitted:  definition;  credit  types used for the line of
credit;  use of the  line of  credit;  the  guarantee  of the  loan  under  this
Agreement; adjustment of the line of credit; dispute settlement;  miscellaneous;
effectiveness; validity; and attention.Exhibit 10.25

                                                                         Summary
                                                                         -------

Loan Agreement signed by and between the Company and  Agricultural  Bank on July
29th, 2005.

Main contents
>>   Contract number: Shenzhen Longgang Nong Jie Zi NO.81101200500000995.
>>   Loan Principal: RMB 50 million;
>>   Loan term: from July 29th, 2005 to January 29, 2006.
>>   Interest rate: fixed rate of 5.2722%;
     |X|  Penalty  interest  rate  for  delayed  repayment:   5.2722%  plus  50%
          *5.2722%;
     |X|  Penalty interest rate for embezzlement of loan proceeds: 5.2722% * 2;
>>   Repayment:  interest is payable  monthly  (20th);  principal  is payable on
     January 29, 2006;
>>   Purpose of the loan is to provide working capital for the Company;
>>   Advanced repayment of loan needs to be approved by the Lender;
>>   Breach  of  contract  penalties:  suspension  of loan  un-provided,  demand
     prepayment of loan principal and interest  before  maturity;  imposition of
     punitive  interest;  compensation for the Lender's expenses incurred due to
     the Company's  breach of contract such as lawyer's fee, travel cost in case
     of litigation, etc.

Terms that have been omitted:  types of the loan; purpose of the loan;  interest
rate of the loan;  clearing of the loan  interest;  condition  precedent  to the
drawing  of the  loan;  rights  and  obligations  of the  borrower;  rights  and
obligations  of the  lender;  prepayment  of the  loan;  guarantee  of the loan;
dispute settlement; miscellaneous; effectiveness; validity; and attention.

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