P21 GmbH (P21) engages in providing energy management solutions to telecommunication industry. The company is principally engaged in developing, producing and marketing fuel cell systems to supply backup power for the mobile communications industry. P21 has successfully proven the capability of its technology in various field tests with international mobile network providers. With its patented hydrogen-powered PEM fuel cell systems, P21 is the leading supplier of backup systems for applications in the telecommunications field. The company is a leader in the development and manufacture of commercially used PEM fuel cell technology in the field of telecommunications. In addition, P21 has recently collaborated with German based O2 GmbH & Co. which offers its customers a postpaid and prepaid mobile-telephony products, as well as innovative mobile data services on the basis of GPRS and UMTS technologies. The company is headquartered in Munich, Germany.