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The PowerFilm F15-300N Foldable solar charger is a big step up in solar chargers. It produces more power and essentially replaces a vehicle's battery for powering small devices. Included 12V female barrel plug makes this charger ideal for powering portable air pumps and electric inverters. Light and compact design stores easily in a backpack or computer bag; durable construction resists UV degradation and harsh outdoor environments. Folded size of 10.3 x 3.3 x 1 in. unfolds to 24.4 x 10.3 in. PowerFilm F15-300N Foldable solar charger features 15.4 operating voltage at 5 watts.