Henri Poincare, a French mathematician and physicist, suggested in 1901 that the displacement current in the Maxwell's equations would result to momentum non-conservation and energy non-conservation. His conjecture has not been verified in the 20 century. I studied his conjecture after I obtained my Ph.D. in nuclear physics. I found his conjecture is true. I also did experiment and observed the increasement of energy. My paper was published in http://www.vixra.org/abs/1005.0078 . I also designed a more powerful device based on my experiment. This device could extract energy from the vacuum. If I have enough fund, I could build it. Contact me to liuxiaod@gmail.com if there is any question.