Document:

Exhibit 10.5

                                                                         Summary
                                                                         -------

Summary of Loan  Agreement by and between  Shenzhen  BAK Battery  Co.,  Ltd. and
Longgang Branch, Agricultural Bank of China dated March 24, 2005.

Main contents
>>   Contract No.: (Shenzhen Longgang) Nong Yin Jie Zi (81101200500000334)
>>   Loan Amount (RMB): 19million yuan
>>   Contract Term: 24th March 2005 ~ 24th September 2005
>>   Interest  rate:  5.22%;  repayment  principal  and interest are payable six
     months from date of agreement
>>   Purpose: Working capital
>>   Liabilities of Breach of Contract:  Breach of contract penalty;  withdrawal
     of loan,  prepayment of principal and interest before maturity,  attachment
     of assets; imposition of compound interest; lawyer's fee and travel cost in
     case of litigation due to the Company 's breach of contract etc.

Terms that have been omitted:  types 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.Exhibit 10.6

                                                                         Summary
                                                                         -------

Summary of Loan  Agreement by and between  Shenzhen  BAK Battery  Co.,  Ltd. and
Longgang Branch, Agricultural Bank of China dated March 25, 2005.

Main contents
>>   Contract No.: (Shenzhen Longgang) Nong Yin Jie Zi (81101200500000338)
>>   Loan Amount (RMB): 30million yuan
>>   Contract Term: 25th March 2005~ 25th September 2005
>>   Interest  rate:  5.22%;  repayment  principal  and interest are payable six
     months from date of agreement
>>   Purpose: Working capital
>>   Liabilities of Breach of Contract:  Breach of contract penalty;  withdrawal
     of loan,  prepayment of principal and interest before maturity,  attachment
     of assets; imposition of compound interest; lawyer's fee and travel cost in
     case of litigation due to the Company 's breach of contract etc.

Terms that have been omitted:  types 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.Exhibit 10.7

                                                                         Summary
                                                                         -------

Summary of Loan  Agreement by and between  Shenzhen  BAK Battery  Co.,  Ltd. and
Longgang Branch, Agricultural Bank of China dated May 31, 2005.

Main contents

>>   Contract number: Shenzhen Longgang Nong Jie Zi NO.81101200500000658.
>>   Loan Principal: RMB 16 million;
>>   Loan term: May 31st, 2005 - November 30th, 2005
>>   Interest rate: fixed rate of 5.22%;
     |X|  Penalty interest rate for delayed repayment: 5.22% plus 50% *5.22%;
     |X|  Penalty interest rate for embezzlement of loan proceeds: 5.22% * 2;
>>   Repayment:  interest is payable monthly (20th); principal is due six months
     from the date of the agreement
>>   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; 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.Exhibit 10.8

                                                                         Summary
                                                                         -------

Summary of Loan  Agreement by and between  Shenzhen  BAK Battery  Co.,  Ltd. and
Longgang Branch, Agricultural Bank of China dated June 2, 2005

Main contents
>>   Contract number: Shenzhen Longgang Nong Jie Zi NO.81101200500000680.
>>   Loan Principal: RMB 15 million;
>>   Loan term: June 2nd, 2005---December 2nd, 2005
>>   Interest rate: fixed rate of 5.22%;
     |X|  Penalty interest rate for delayed repayment: 5.22% plus 50% *5.22%;
     |X|  Penalty interest rate for embezzlement of loan proceeds: 5.22% * 2;
>>   Repayment:  interest is payable  monthly  (20th) and  principal  is due six
     months from the date of the agreement;
>>   Purpose of the loan is to provide  working  capital  for the Company to buy
     raw material;
>>   Advanced repayment of loan needs to be approved by the Lender;
>>   Breach  of  contract  penalties:  suspension  of  loan  unprovided,  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; 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.Exhibit 10.9

                                                                         Summary
                                                                         -------

Comprehensive  Credit  Facilities  Agreement by and between Shenzhen BAK Battery
Co., Ltd.and Development Bank dated as of April 7, 2005.

Main contents
>>   Contract number: Shenfa Longgang zongzi NO.20050407001.
>>   Contract term: from April 30th, 2005 to April 30th, 2006, and the amount of
     credit to be extended by Development Bank is RMB 150 million.
>>   Remedies  in the event of breach of  contract:  include  adjustment  of the
     credit amount,  suspension of credit,  imposition of punitive  interest and
     overdue  interest,  an increase of  guarantee  deposit and the call back of
     loan principal and interest before maturity
>>   Additional terms:
     |X|  All unsettled credit  facilities  under the Credit Facility  Agreement
          with the contract number of Shenfa Longgang Zongzi  No.200403055 shall
          be under  the  consolidated  management  of  credit  facilities  under
          Comprehensive Agreement 1.
     |X|  Credit  facilities  under  Comprehensive  Agreement  1 can be used for
          working capital;
>>   The Company should submit its financial  statement to the bank monthly.  If
     the asset  liability ratio of the company exceeds 70%, the sales revenue or
     net asset of the Company declines by 10% when compared with the same period
     of the  previous  year,  Development  Bank is  entitled  to deem the credit
     facilities matured before expiration of their term.

Terms that have been omitted:  mode of the comprehensive  credit; the use of the
comprehensive  credit;  the guarantee of the comprehensive  credit;  expense and
fees for the  comprehensive  credit;  undertakings  and  representations  of the
lender;  special  covenant  in respect  of group  client  credit and  affiliated
transaction; applicable law and dispute settlement; effectiveness; validity; and
miscellaneous.Exhibit 10.10

                                                                     Translation
                                                                     -----------

                       Guaranty Contract of Maximum Amount

                                            Shenfa Longgang E'bao Zi 20050407001

Party A: Longgang Branch, Shenzhen Development Bank (Creditor)
Address: A1, Xinyazhou Park, Central Town, Longgang District, Shenzhen
Telephone: 28952003             Fax: 28952004
Person in charge: Yu Bo         Position: President of Longgang Branch

Party B: Li Xiangqian (Guarantor)
Address: 21D, Yijin'ge, Tian'an Golf Park, Futian District, Shenzhen
Telephone: 83841596             Fax: 89770026

In  order  to  secure  the  indebtedness  of  Shenzhen  BAK  Battery  Co.,  Ltd.
(hereinafter  referred to as Obligor) under the Comprehensive  Credit Facilities
Agreement  (reference  no.  Shenfa  Longgang  Zongzi  20050407001,   hereinafter
referred to as Master Agreement) entered into by Creditor and Obligor on 7 April
2005, the Guarantor  agrees to provide guaranty to the Creditor as the guarantor
of the Obligor.  Through friendly negotiation,  both parties agree to enter into
this Contract:

I. Scope of Guaranty
The scope of guaranty covers all loan principal,  interest, penalty interest and
all the expenses incurred to the Creditor in realizing its creditor's right. The
maximum loan principal shall not exceed RMB 150 Million yuan.

II. Guaranty Period
The guaranty  period under this  Contract is from the date of  effectiveness  of
this  Contract to 2 years after the expiry of each credit  facilities  under the
Master  Agreement.  In case that the Creditor  lawfully  transfer its creditor's
right to a third party during the guaranty period,  the Guarantor shall continue
to perform its obligation of guaranty as originally agreed.

<PAGE>

III. Obligation of Guaranty
The  Guarantor  shall  bear  the  joint  and  several  liability  to  repay  all
indebtedness of the Obligor within the scope of the guaranty. In case of default
by the  Obligor,  the  Creditor  is  entitled  to demand the Obligor to repay or
demand the  Guaranty.  The  Guarantor  irrevocably  authorizes  the  Creditor to
transfer  directly the relevant amount of money from the account of Guarantor to
the account of  Creditor  in case of default of the  Obligor  upon mature of its
indebtedness.

IV. The guaranty of pledge  provided by the  Guarantor is  independent  from and
shall not be replaced by any other guaranty provided by other guarantors.

V. The guaranty under this Contract is irrevocable  and shall not be affected by
any  documentations  or  agreements  entered  into by the  Guarantor  and  other
parties,  nor  be  affected  by  the  insolvency,  bankruptcy,  cancellation  of
corporate status, or amendment of articles of association of the Obligor.

VI. In case that part or whole of the Master Agreement or agreement entered into
under the Master Agreement become invalid due to any reason, the Obligor shall
nevertheless perform its obligation of repayment and the Guarantor shall perform
its obligation of guaranty for the Obligor's obligation of repayment in
accordance with this Contract.

VII. Undertakings and Representations of the Guarantor

The Guarantor is legally qualified to execute and perform this Contract, and has
obtained  all  necessary  authorization  by the  board  of  directors  or  other
competent authorities (as the case may be).

<PAGE>

The Guarantor  undertakes that all application  materials submitted by it to the
Creditor  are  truthful,  lawful,  effective  and  with  no  serious  errors  or
omissions.

The Guarantor also undertakes that all  application  materials  submitted by the
Obligor to the  Creditor are  truthful,  lawful,  effective  and with no serious
errors or omissions.  The Guarantor  shall notify the Creditor in writing within
10 days after it has changed its address,  contact details,  liaison  telephone,
business scope or legal representative etc.

The  Guarantor  has fully  understood  all  provisions of this Contract and both
parties execute this Contract of their free will.

VIII.   Amendment and Termination of Contract
     1.   In case that any party intends to amend or terminate this Contract, it
          shall notify the other party in writing and a written  agreement shall
          be reached by both parties. This Contract shall remain valid until the
          written  agreement  to  amend  or  terminate  this  Contract  has been
          reached.
     2.   Any  waiver  or  tolerance  of the  Creditor  shall  not be  deemed as
          amendment  or  termination  of this  Contract  except  that a  written
          agreement has been reached in accordance with the above provision.
     3.   In case that the Master Agreement has been amended, the Creditor shall
          seek the approval of the Guarantor  immediately.  The Guarantor  shall
          continue to bear the  responsibility  of guaranty for the indebtedness
          of the  Obligor  under  the  Master  Agreement  (before  and after the
          amendment)  only after it has approved such  amendment.  However,  the
          Creditor  does not  need to seek the  approval  of the  Guarantor  for
          amendment of the Master  Agreement which decreases the indebtedness of
          the Obligor.

<PAGE>

IX.     Applicable Law and Dispute Settlement
     1.   The execution and  performance  of this Contract  shall be governed by
          the laws of People's Republic of China;
     2.   The method of dispute  settlement  for this Contract shall be the same
          with that of the Master Agreement.

X. This Contract shall be signed and stamped by both parties (only  signature is
needed for party of natural  person).  This Contract shall become effective upon
the delivery of the pledged collaterals to the Creditor.  If the pledge shall be
registered or recorded in accordance  with article 78 or 79 of the Guarantee Law
of People's  Republic of China,  this Contract  shall become  effective upon the
registration or record.

   XI. Other Issues

Party A (Company Chop):__________________
Authorized Representative: ______________
Date: 28 April 2005

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