The Freeloader Supercharger solar charger is a very tough, all weather solar cell, capable of charging a Freeloader solar charger in half the time. Simply strap Supercharger to a backpack, bike pannier or travel bag & plug it into Freeloader’s hub for instant power wherever your travel. 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! Light weight, practical & eco-friendly!