Orange UK has once again partnered with GotWind to develop yet another conceptual product that will probably never see the light of day. The Orange Power Wellies can charge up your gadgets thanks to a built-in battery and some new fangled tech that can convert temperature changes into power. So when your feet go from warm to hot, or cold to warm the battery receives a charge. But much like many of their previous products these Wellies are highly inefficient. Even after 12 hours of romp stomping you’ll get only an hour of juice. But hey if you’re lost in the wood you’re probably doing some serious sweating.