Document:

Exhibit 10.87

                          SECURED TERM PROMISSORY NOTE
                                   (Term Loan)
                             Los Angeles, California

$812,500                                                        January 31, 2001

      FOR VALUE RECEIVED, the undersigned ("Borrowers"), jointly and severally,
promise to pay to the order of COAST BUSINESS CREDIT ("Coast"), a division of
Southern Pacific Bank, a California corporation, at 12121 Wilshire Boulevard,
Suite 1400, Los Angeles, California, or at such other address as the holder of
this Note shall direct, the principal sum of Eight Hundred Twelve Thousand Five
Hundred Dollars ($812,500), with interest payable as hereinafter provided;
provided, however, the entire unpaid principal balance of this Note, plus any
and all accrued and unpaid interest, shall be due and payable on the earlier of:
(i) April 30, 2001, or (ii) the date the Loan and Security Agreement between the
Borrowers and Coast dated of even date herewith (the "Loan Agreement")
terminates by its terms or is terminated by either party in accordance with its
terms.

      This Note shall bear interest on the unpaid principal balance hereof from
time to time outstanding at a rate equal to the "Prime Rate" (as hereinafter
defined) plus 2.5% per annum, but in no event shall the interest rate in any
month be less than 9% per annum, interest shall be calculated on the basis of a
360-day year for the actual number of days elapsed. As used herein, the term
"Prime Rate" shall mean the actual "Reference Rate" or the substitute therefor
of the Bank of America, N.A., or its successor, whether or not that rate is the
lowest interest rate charged by said bank. The interest rate applicable to this
Note shall be adjusted monthly, as of the first day of each month, and the
interest rate charged during each month shall be based on the highest Prime Rate
in effect during said month. If the Prime Rate is unavailable, "Prime Rate"
shall mean the highest of the prime rates published in the Wall Street Journal
on the first business day of the month, as the base rate of corporate loans at
large U.S. money center banks. Accrued interest shall be payable monthly,
commencing on February 28, 2001, and continuing on the last day of each
succeeding month.

      Principal of, and interest on, this Note shall be payable in lawful money
of the United States of America. If a payment hereunder becomes due and payable
on a Saturday, Sunday or legal holiday, the due date thereof shall be extended
to the next succeeding business day, and interest shall be payable thereon
during such extension.

      In the event any payment of principal or interest on this Note is not paid
in full when due, or if any other default or event of default occurs under the
Loan Agreement or any other present or future instrument, document, or agreement
between Borrowers (or either of them) and Coast, Coast may, at its option, at
any time thereafter, declare the entire unpaid principal balance of this Note
plus all accrued interest to be immediately due and payable, without notice or
demand. Without limiting the foregoing, and without limiting Coast's other
rights and remedies, in the event any installment of principal or interest is
not paid in full on or before the date due, Borrowers, jointly and severally,
agree that it would be impracticable or extremely difficult to fix the actual
damages resulting therefrom to Coast, and therefore the Borrowers, jointly and
severally, agree immediately to pay to Coast an amount equal to 5% of the
installment (or portion thereof) not paid, as liquidated damages, to compensate
Coast for the internal administrative expenses in administering the default. The
acceptance of any installment of principal or interest by Coast after the time
when it becomes due, as herein specified, shall not be held to establish a
custom, or to waive any rights of Coast to enforce payment when due of any
further installments or any other rights, nor shall any failure or delay to
exercise any rights be held to waive the same.

      All payments hereunder are to be applied first to costs and fees referred
to hereunder, second to the payment of accrued interest and the remaining
balance to the payment of principal. Any principal prepayment

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hereunder shall be applied against principal payments in the inverse order of
maturity. All prepayments shall include interest on the amount prepaid to the
date of prepayment. Coast shall have the continuing and exclusive right to apply
or reverse and reapply any and all payments hereunder in its sole discretion.

      Borrowers, jointly and severally, agree to pay all costs and expenses
(including without limitation attorney's fees) incurred by Coast in connection
with or related to this Note, or its enforcement, whether or not suit be
brought. Borrowers hereby further waive presentment, demand for payment, notice
of dishonor, notice of nonpayment, protest, notice of protest, and any and all
other notices and demands in connection with the delivery, acceptance,
performance, default, or enforcement of this Note, and Borrowers hereby waive
the benefits of any statute of limitations with respect to any action to
enforce, or otherwise related to, this Note.

      This Note is secured by the Loan Agreement and all other present and
future security agreements between Borrowers (or either of them) and Coast,
including, without limitation, the Multi-State Mortgage with Power of Sale,
Assignment of Rents, Security Agreement and Fixture Filing (Minnesota Deed of
Trust) and the Deed to Secure Debt, Assignment of Rents, Security Agreement and
Fixture Filing (Georgia Deed of Trust). Nothing herein shall be deemed to limit
any of the terms or provisions of the Loan Agreement or any other present or
future document, instrument or agreement, between Borrowers (or either of them)
and Coast, and all of Coast's rights and remedies hereunder and thereunder are
cumulative.

      In the event any one or more of the provisions of this Note shall for any
reason be held to be invalid, illegal or unenforceable, the same shall not
affect any other provision of this Note and the remaining provisions of this
Note shall remain in full force and effect.

      No waiver or modification of any of the terms or provisions of this Note
shall be valid or binding unless set forth in a writing signed by a duly
authorized officer of Coast, and then only to the extent therein specifically
set forth. If more than one person executes this Note, their obligations
hereunder shall be joint and several.

      COAST AND EACH BORROWER HEREBY EACH WAIVE THE RIGHT TO TRIAL BY JURY IN
ANY ACTION OR PROCEEDING BASED UPON, ARISING OUT OF, OR IN ANY WAY RELATING TO:
(i) THIS NOTE; OR (ii) ANY OTHER PRESENT OR FUTURE INSTRUMENT OR AGREEMENT
BETWEEN COAST AND BORROWERS; OR (iii) ANY CONDUCT, ACTS OR OMISSIONS OF COAST OR
BORROWERS OR ANY OF THEIR DIRECTORS, OFFICERS, EMPLOYEES, AGENTS, ATTORNEYS OR
ANY OTHER PERSONS AFFILIATED WITH COAST OR BORROWERS.

      This Note is payable in, and shall be governed by the internal laws of,
the State of California.

                                 GREENMAN TECHNOLOGIES OF GEORGIA, INC.,
                                 a Georgia corporation

                                 By: /s/ Charles E. Coppa
                                    --------------------------------------------

                                 Title: Treasurer
                                       -----------------------------------------

                                 GREENMAN TECHNOLOGIES OF MINNESOTA, INC.,
                                 a Minnesota corporation

                                 By: /s/ Charles E. Coppa
                                    --------------------------------------------

                                 Title: Treasurer
                                       -----------------------------------------

                                       2Exhibit 10.88

                             SECURED PROMISSORY NOTE
                          (Equipment Acquisition Loan)
                             Los Angeles, California

$1,000,000                                                      January 31, 2001

      FOR VALUE RECEIVED, the undersigned (jointly and severally, "Borrower")
promise to pay to the order of Coast Business Credit, a division of Southern
Pacific Bank, ("Coast"), at 12121 Wilshire Boulevard, Suite 1400, Los Angeles,
California, or at such other address as the holder of this Note shall direct,
the principal sum of One Million Dollars ($1,000,000), or such lesser sum as
maybe advanced from time to time hereunder, which said sum shall be advanced to
Borrower in increments of at least One Hundred Thousand Dollars ($100,000),
each, based upon an advance rate of eighty percent (80%) of the cost of new
equipment acquired by Borrower (less any and all sales taxes and installation
charges). At the time of each advance hereunder, the aggregate of the then
outstanding principal balance, if any, shall be added to the new advance and the
total aggregate balance of both shall be divided by the number of months
remaining between the last day of the month in which such advance took place and
January 31, 2006 and the amount of said installments, rounded to the nearest One
Hundred Dollars ($100), shall be payable in consecutive monthly payments (or
earlier, as hereinafter referred to) on the last day of each month commencing on
the first (1st) full calendar month following the initial advance and each such
subsequent advance hereunder and continuing on the last day of each succeeding
month until January 31, 2006. The entire remaining unpaid principal balance of
this Note, plus any and all accrued and unpaid interest, shall be due and
payable on the earlier of: (i) January 31, 2006, or (ii) the date the Loan and
Security Agreement between the Borrower and Coast dated of even date herewith
(the "Loan Agreement") terminates by its terms or is terminated by either party
in accordance with its terms.

      This Note shall bear interest on the unpaid principal balance hereof from
time to time outstanding at a rate equal to the "Prime Rate" (as hereinafter
defined) plus two and one half percent (2.5%) per annum, but in no event shall
the interest rate in any month be less than nine percent (9%) per annum.
Interest shall be calculated on the basis of a 360-day year for the actual
number of days elapsed. As used herein, the term "Prime Rate" shall mean the
actual "Reference Rate" or the substitute therefor of Bank of America, NT & SA,
or its successor, whether or not that rate is the lowest interest rate charged
by said bank. The interest rate applicable to this Note shall be adjusted
monthly, as of the first day of each month, and the interest rate charged during
each month shall be based on the highest Prime Rate in effect during said month.
If the Prime Rate is unavailable, "Prime Rate" shall mean the highest of the
prime rates published in the Wall Street Journal on the first business day of
the month, as the base rate of corporate loans at large U.S. money center banks.
Accrued interest shall be payable monthly, in addition to the principal payments
provided above, commencing on the due date of the first (1st) principal payment
hereunder, and continuing on the last day of each succeeding month.

      Principal of, and interest on, this Note shall be payable in lawful money
of the United States of America. If a payment hereunder becomes due and payable
on a Saturday, Sunday or legal holiday, the due date thereof shall be extended
to the next succeeding business day, and interest shall be payable thereon
during such extension.

      In the event any payment of principal or interest on this Note is not paid
in full when due, or if any other default or event of default occurs under the
Loan Agreement or any other present or future instrument, document, or agreement
between Borrower and Coast, Coast may, at its option, at any time thereafter,
declare the entire unpaid principal balance of this Note plus all accrued
interest to be immediately due and payable, without notice or demand. Without
limiting the foregoing, and without limiting Coast's other rights and remedies,
in the event any installment of principal or interest is not paid in full on or
before the date due, Borrower agrees that it would be impracticable or extremely
difficult to fix the actual damages resulting therefrom to Coast, and therefore
the Borrower agrees immediately to pay to Coast an amount equal to 5% of the
installment (or portion thereof) not

                                       1
<PAGE>

paid, as liquidated damages, to compensate Coast for the internal administrative
expenses in administering the default. The acceptance of any installment of
principal or interest by Coast after the time when it becomes due, as herein
specified, shall not be held to establish a custom, or to waive any rights of
Coast to enforce payment when due of any further installments or any other
rights, nor shall any failure or delay to exercise any rights be held to waive
the same.

      All payments hereunder are to be applied first to costs and fees referred
to hereunder, second to the payment of accrued interest and the remaining
balance to the payment of principal. Any principal prepayment hereunder shall be
applied against principal payments in the inverse order of maturity. Coast shall
have the continuing and exclusive right to apply or reverse and reapply any and
all payments hereunder in its sole discretion.

      Borrower agrees to pay all costs and expenses (including without
limitation attorney's fees) incurred by Coast in connection with or related to
this Note, or its enforcement, whether or not suit be brought. Except as
expressly provided to the contrary in the Loan Agreement, Borrower hereby
further waives presentment, demand for payment, notice of dishonor, notice of
nonpayment, protest, notice of protest, and any and all other notices and
demands in connection with the delivery, acceptance, performance, default, or
enforcement of this Note.

      This Note is secured by the Loan Agreement and all other present and
future security agreements between Borrower and Coast. Nothing herein shall be
deemed to limit any of the terms or provisions of the Loan Agreement, or any
other present or future document, instrument or agreement, between Borrower and
Coast, and all of Coast's rights and remedies hereunder and thereunder are
cumulative.

      In the event any one or more of the provisions of this Note shall for any
reason be held to be invalid, illegal or unenforceable, the same shall not
affect any other provision of this Note and the remaining provisions of this
Note shall remain in full force and effect.

      No waiver or modification of any of the terms or provisions of this Note
shall be valid or binding unless set forth in a writing signed by a duly
authorized officer of Coast, and then only to the extent therein specifically
set forth.

      COAST AND BORROWER EACH HEREBY WAIVE THE RIGHT TO TRIAL BY JURY IN ANY
ACTION OR PROCEEDING BASED UPON, ARISING OUT OF, OR IN ANY WAY RELATING TO: (i)
THIS NOTE; OR (ii) ANY OTHER PRESENT OR FUTURE INSTRUMENT OR AGREEMENT BETWEEN
COAST AND BORROWER; OR (iii) ANY CONDUCT, ACTS OR OMISSIONS OF COAST OR BORROWER
OR ANY OF THEIR DIRECTORS, OFFICERS, EMPLOYEES, AGENTS, ATTORNEYS OR ANY OTHER
PERSONS AFFILIATED WITH COAST OR BORROWER.

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<PAGE>

      This Note is payable in, and shall be governed by the internal laws of,
the State of California.

                                   GREENMAN TECHNOLOGIES OF GEORGIA, INC.,
                                   a Georgia corporation

                                   By: /s/ Charles E. Coppa
                                       -----------------------------------------

                                   Title: Treasurer
                                          --------------------------------------

                                   GREENMAN TECHNOLOGIES OF MINNESOTA, INC.,
                                   a Minnesota corporation

                                   By: Charles E. Coppa
                                       -----------------------------------------

                                   Title: Treasurer
                                          --------------------------------------

                                       3

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