This bag of “juice” or energy is a hot concept great for anyone who uses electronics outside the house. The bag features a 12 x 12 solar panel that brings in 16.6 Volts of power. Off course the juice bag is only useful if in sunlight, the more sunlight the better. A great buy for modern travelers of any kind. Made from tough, stop-rip nylon material this back pack has it all. $199.95 at rewarestore.com.