The Medis 24/7 Xtreme Portable Charger is the world's first personal, portable, fuel cell power system. The Medis 24/7 Xtreme Portable Charger uses electrochemical energy to power your phone, eliminating the need for outlets, wall chargers and the limitations of batteries. Just squeeze it and give it a shake and your phone can be powered up wherever you are. Included are a variety of connectors, such as a standard USB, Mini USB, Micro USB, Palm Treo, and Nokia tips.