SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 8-A


                FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES
                     PURSUANT TO SECTION 12(b) OR (g) OF THE
                         SECURITIES EXCHANGE ACT OF 1934


                            OnLine Power Supply, Inc.
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                 Nevada                               84-1176494
- -----------------------------------------  -------------------------------------
(State of Incorporation or Organization)    (I.R.S. Employer Identification No.)

8100 So. Akron Street, S.308, Englewood, CO           80112
- --------------------------------------------  ----------------------------------
  (Address of principal executive offices)            (zip code)

If this form relates to the                If this form relates to the
registration of a class of securities      registration of a class of securities
pursuant to section 12(b) of the           pursuant to section 12(g) of the
Exchange Act and is effective              Exchange Act and is effective
pursuant to General Instruction            pursuant to General Instruction
A.(c), please check the following          A.(d), please check the following
box. /   /                                 box. /X /


Securities Act registration statement file number to which this form relates:
                                       N/A
- --------------------------------------------------------------------------------
                                 (If applicable)

Securities to be registered pursuant to Section 12(b) of the Act:

                                      None
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        Securities to be registered pursuant to Section 12(g) of the Act:

                         Preferred Stock Purchase Rights
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ITEM 1.  Description of the Registrant's Securities to be Registered.

     This summary is qualified  by reference to the detailed  provisions  of the
Rights Agreement,  a copy of which is filed herewith as Exhibit 2. A copy of the
Rights Agreement is available free of charge from the Company.

     As of April 25, 2001,  the board of directors of OnLine Power Supply,  Inc.
(the "Company")  declared a distribution  of one Right for each  outstanding one
share of common stock (the "Common Shares") of the Company.  The distribution is
to be made as of April 25, 2001 (the "Rights  Record Date") to the  stockholders
of record on that date.  All Common  Shares  issued after the Rights Record Date
also will carry one Right for each share.  The Rights are designed to discourage
unfair  takeovers of the Company,  by  encouraging  a potential  acquiror of the
Company to  negotiate  with the board of directors a fair price for the Company.
The Rights  defined as part of the Rights  Agreement  between  the  Company  and
Corporate  Stock  Transfer,  Inc. as the Rights Agent.  Arrangements  adopted by
United States  corporations  which are similar to the Rights Agreement are often
called  "poison  pills." As summarized  below,  if a Qualified  Offer is made to
acquire all the stock of the Company,  the Rights would be redeemed by the board
of directors, thus causing the poison pill to disappear.

     Each Right  entitles the  registered  holder to purchase  from the Company,
initially, one one-thousandth (1/1,000th) of one (1) share of Series P Preferred
Stock ("Preferred Shares") at a price of $200.00 (the "Purchase Price") for each
1/1,000th  of 1 share,  subject to  adjustment.  Fractional  shares  will not be
issued, but will be cashed out.

     A Preferred Share  purchasable upon exercise of the Rights will be entitled
to  dividends  equal to 1,000 times the  dividends,  per share,  declared on the
Common Shares.  In the event of liquidation,  a Preferred Share will be entitled
to a minimum  preferential  liquidating  distribution of $1,000 per share and an
aggregate  liquidating  distribution,  per  share,  equal  to  1,000  times  the
distribution made per Common Share. The Preferred Shares will vote together with
the  Common  Shares  and in the  event  of any  merger,  consolidation  or other
transaction in which Common Shares are exchanged,  each Preferred  Share will be
entitled to receive 1,000 times the amount received per Common Share.

     Because of the Preferred Shares' dividend and liquidation rights, the value
when issued of the 1/1,000th of a Preferred Share  purchasable  upon exercise of
each Right should  approximate  the underlying  value (but not  necessarily  the
market value) of one Common Share.

     Until the  earlier  to occur of (i) 10  business  days  following  a public
announcement  that a person or group of  affiliated  or  associated  persons (an
"Acquiring  Person")  has  acquired  beneficial  ownership of 15% or more of the
Company's  general  voting  power other than  pursuant to a Qualified  Offer (as
defined  below),  the date of such public  announcement  being called the "Stock
Acquisition  Date,"  or (ii) 10  business  days  (or such  later  date as may be
determined by action of the board of directors)  following the  commencement of,
or  announcement  of an intention to make, a tender offer or exchange  offer the
consummation  of which would result in the  beneficial  ownership by a person or
group of 15% or more of the  Company's  general  voting  power (the date of such
earlier  occurrence being called the  "Distribution  Date"),  the Rights will be
evidenced  by the  certificates  representing  the  Common  Shares  and  will be
transferred with and only with the Common Shares.  New Common Share certificates
issued  after the Rights  Record Date upon  transfer  or new  issuance of Common
Shares will contain a notation  incorporating the Rights Agreement by reference,
and the  surrender  for  transfer of any  certificate  for Common  Shares,  even
without such notation or a copy of this Summary of

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Rights being attached  thereto,  will also constitute the transfer of the Rights
associated with the Common Shares represented by such certificate.

     If there ever is a Distribution  Date,  then  immediately  the Company will
mail to holders of record of the Common  Shares (as of the close of  business on
the  Distribution  Date)  separate  certificates  evidencing  the Rights ("Right
Certificates"),  and such separate  Right  Certificates  alone will evidence the
Rights.

     The Rights are not exercisable until the Distribution Date. The Rights will
expire on the tenth anniversary of the Rights Record Date (the "Final Expiration
Date"),  unless the Final  Expiration  Date is extended or unless the Rights are
earlier redeemed or exchanged by the Company, as described below.

     The Purchase  Price  payable,  the number of shares or other  securities or
property  issuable  upon exercise of the Rights,  and the number of  outstanding
Rights, are subject to adjustment from time to time to prevent dilution.

     A Qualified  Offer is a tender offer or exchange offer for all  outstanding
Common  Shares which is  determined  by the  directors  not  affiliated  with an
Acquiring  Person  to be fair to and  otherwise  in the  best  interests  of the
Company and its shareholders.

     If any person becomes an Acquiring Person other than by a purchase pursuant
to a Qualified  Offer,  proper  provision shall be made so that each holder of a
Right, other than Rights  beneficially owned by the Acquiring Person (which will
not be entitled  to the benefit of such  adjustment)  will  thereafter  have the
right to receive  upon  exercise  that number of Common  Shares or Common  Share
equivalents  having a market value of two times the exercise  price of the Right
(i.e.,  Common  Shares will be issued at one-half or 50% of market  value at the
time).

     If, at any time after an Acquiring  Person has become such,  the Company is
acquired in a merger or other  business  combination  transaction  (other than a
merger which follows a Qualified  Offer at the same or a higher price) or 50% or
more of its consolidated assets or earning power are sold, proper provision will
be made so that  each  holder  of a Right  will  thereafter  have  the  right to
receive,  upon the exercise  thereof at the then current  exercise  price of the
Right,  that number of shares of common stock of the acquiring  company which at
the time of such  transaction will have a market value of two times the exercise
price of the Right.

     At any time  after an  Acquiring  Person  has  become  such,  the  board of
directors  of the Company may  exchange  the Rights  (other than Rights owned by
such person or group),  in whole or in part, at an exchange  ratio of one Common
Share per one Right  (subject  to  adjustment),  termed  an  "Exchange."  Unlike
exercise of a Right with cash (see the  preceding  paragraph),  such an Exchange
would not require  payment of cash or other  consideration  by the holder of the
Right.

     At any time up to close of business on a Stock  Acquisition Date, the board
of directors of the Company may redeem the Rights in whole,  but not in part, at
a price  of $.01  per  Right  (the  "Redemption  Price").  Immediately  upon any
redemption of the Rights, the right to exercise them will terminate and the only
right of the holders  will be to receive the  Redemption  Price.  However,  such
redemption  only  can be  made in  conjunction  with  the  board  of  directors'
determination that there is a Qualified Offer.

     The terms of the Rights may be  amended by the board of  directors  without
the consent of the  holders of the Rights at any time prior to the  Distribution
Date. Thereafter the Rights may be amended to make

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changes  which do not  adversely  affect  the  interests  of the  holders of the
Rights,  or  which  shorten  or  lengthen  time  periods,   subject  to  certain
limitations set forth in the Rights Agreement.

     Holders of Rights will have no rights as stockholders of the Company, until
Preferred  Shares or Common  Shares are  acquired on exercise or exchange of the
Rights.


ITEM 2.  EXHIBITS.

4.3      Rights  Agreement,  dated as of April 25,  2001  between  OnLine  Power
         Supply,  Inc.  and  Corporate  Stock  Transfer,  Inc. as Rights  Agent;
         includes Form of Right  Certificate,  Summary of Rights,  which will be
         sent to all holders of record of the outstanding shares of Common Stock
         of the  registrant,  and the  Certificate of  Designation  creating the
         Series P Preferred Stock.


                                    SIGNATURE

     Pursuant to the  requirements of Section 12 of the Securities  Exchange Act
of 1934, the registrant has duly caused this registration statement to be signed
on its behalf by the undersigned, thereto and duly authorized.

                                  OnLine Power Supply, Inc.


Date: April 24, 2001              By:   /s/   Kris M. Budinger
                                     -------------------------------------------
                                     Kris M. Budinger, Chief Executive Officer


                                  EXHIBIT INDEX

EXHIBIT NO.   NAME OF ITEM

   4.3        Rights Agreement,  dated as of April 25, 2001 between OnLine Power
              Supply,  Inc. and Corporate Stock Transfer,  Inc. as Rights Agent;
              includes Form of Right Certificate,  Summary of Rights, which will
              be sent to all  holders  of  record of the  outstanding  shares of
              Common Stock of the registrant, and the Certificate of Designation
              creating the Series P Preferred Stock.


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