X0202 4 2007-12-13 0001103345 BEACON POWER CORP BCON 0001250234 SMITH JACK P C/O BEACON POWER CORPORATION 65 MIDDLESEX ROAD TYNGSBORO MA 01879 1 0 0 0 Stock Option (Right to Buy) 1.59 2007-12-13 4 A 0 13387 0 A 2017-12-12 Common Stock 13387 13387 D Such option will vest over one year in 12 substantially equal installments at the end of each monthly anniversary commencing on the date of grant (with any fractional shares to be cumulated and to become exercisable at the end of the earliest succeeding monthly period in which a whole share equivalent is accumulated). This option becomes fully exercisable on 11/30/2008. /s/ Albert L. Sokol as attorney-in-fact for Jack P. Smith 2007-12-17