SideWinder is the first battery-free pocket-sized cell phone charger. For convenience, emergencies, or just peace of mind, the SideWinder can provide all the talk time you need. Two minutes with the generator, yields up to six minutes of talk time and even more standby time. Crank the generator while using the phone, and talk indefinitely. It supports most popular phones from Motorola, Nokia, Ericsson, Samsung, Lucky Goldstar (LG), Qualcomm, Kyocera, and Audiovox.