Yep, Walden make them. There are two guys that use them in Victoria and have multiple batteries. They stay out for 3 hours. Fortunately they are scared of any wave over 2 ft and now probably weigh in at around 120kg+ so have difficulty when standing. They can't turn very them well, but can control speed and admittedly I haven't seen them hit anyone. At the other end of the spectrum, there is a really nice guy in Newcastle ( a Stockton local?) with crippling osteo in his shoulders and a really dodgy back who is actually a very good surfer and uses the board like it should be used, as an assistance. Unfortunately it's seems to be human nature to take a good idea that helps people that need it for health purposes (Newcastle guy), and exploit it for lazy personal gain (Two fat Vicco longboarders). Human nature

. Common Sense..... a Myth from the past