The waterproof SolarRoll has given sea kayakers the power to photograph their voyages from the far reaches of the planet. And next spring, it will assist Ed Viesturs in his final summit, Annapurna, as he polishes off the last peak of Endeavor 8000. Ideal for powering satellite phones, members of expeditions worldwide pack the SolarRoll in place of expensive extra batteries that don�t offer much relief in the form of weight. [...You can also use] the SolarRoll for charging [the] car battery or running [the] video camera.