SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549



                                    FORM 8-K

                                 CURRENT REPORT

                         PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934




        Date of Report (Date of earliest event reported): August 16, 2004



                            BEACON POWER CORPORATION
             (Exact name of registrant as specified in its charter)


               Delaware               000-31973             04-3372365
     ------------------------- ----------------------- --------------------
          (State or Other           (Commission           (IRS Employer
   Jurisdiction of Incorporation)   File Number)        Identification No.)



   234 Ballardvale Street, Wilmington, MA                    01887
   --------------------------------------                  ----------
  (Address of principal executive offices)                 (Zip Code)


       Registrant's telephone number, including area code: (978) 694-9121




ITEM 12. RESULTS OF OPERATIONS AND FINANCIAL CONDITION.

     On August 16, 2004,  the  Registrant  issued a press  release to report its
financial  results  for the  quarter  ended June 30,  2004.  A copy of the press
release is  furnished  pursuant to this Item 12 as Exhibit  99.1 to this current
report on Form 8-K.

The following is filed as an exhibit to this report.

Exhibit No.            Description of Exhibit
- -----------            ----------------------
99.1                   Press Release issued August 16, 2004





                                   SIGNATURES

     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.


BEACON POWER CORPORATION



Date: August 16, 2004                     /s/James M. Spiezio
                                          --------------------------
                                          Name: James M. Spiezio
                                          Title: Vice President of Finance,
                                                 Chief Financial Officer,
                                                 Treasurer and Secretary




                                  EXHIBIT INDEX

Exhibit
Number         Description
- ------         -----------
99.1           The Registrant's Press Release dated August 16, 2004.