Compact power when youre on the move the ibump is small enough for your keyring but packs a punch using a solar panel or usb port to re charge your smart phone at festivals or camping tripsspecialising in power solutions brunton is synonymous with hi tech outdoor innovation the bump is sure to be the go to solution for festivals and campsites this summer as smartphones and gadgets have become ever more integral to our outdoor experiences with a 50ma solar panel let it store up the juice