Double the power for longer excursions. Designed to give multiple charges on small devices and quickly charge up from USB or sun. CHARGING AND POWERING CHARGING THERE ARE 2 WAYS TO CHARGE YOUR FLIP 20 RECHARGERTHE SUNThe Flip 10 can be charged by connecting a compatible solar panel. The Nomad 7 Solar Panel recharges the Flip 20 in 5-10 hours.USB The Flip 20 can also be charged by being plugged into a USB power source.CHARGE TIME USB Power Source: 4 hours; Nomad 7 Solar Panel: 5 - 10 HoursOperating usage temp.: 32-104 F (0-40 C)Power anytime, anywhere!