Super tough all weather 1.5W crystalline solar cell Capable of charging Freeloader in half the time Rapidly charges Freeloader in all weather conditions Buckles and velcro strap allow easy attachment to a backpack bike pannier or travel bag Supercharger is a super tough super fast means to charge a Freeloader. Supercharger will fully power up a Freeloader in as little as 4 hours in sunshine which means it is possible to charge Freeloader twice in one day By using an ultra efficient compact 1.5 watt crystalline solar cell Freeloader can be rapidly charged in all weather conditions. Supercharger is a fully weather resistant unit supplied in a tough case with two innovative buckles and a Velcro attachment strap for secure fixing to a rucksack travel bag bike panniers and more. Weighing in at a featherweight 200grams the extra weight will barely be noticed. Supercharger easily couples to the Freeloader battery hub using the original USB charge cable supplied with Freeloader. Just plug in for instant performance.