A mobile sauna / battery factory produced for the New Museum’s Ideas City Festival. Inside the sauna placed on the streets of New York, visitors found others relaxing and sharing ideas about pressing issues of our day in a moderated yet free-flowing conversation. They could join in or simply listen. The combined energy of burning wood and intellectual discussion produced abundant sweat. Pending permission, the trained staff gathered that sweat and transformed it into the active ingredient in an electrical battery. This hand-made ceramic battery was produced on the spot, stored in a special container, and preserved for The Emergency. The sweat equity of visitors mingled with the sweat of others and be stored as potential energy. Visitors emerged refreshed, doused with water, relieved of stress, and prepared for tomorrow. This program was part of The Canary Project’s Modern Primitive Exchange: Design and Ideas for Living through the End Times in collaboration with the DS Institute, which built and designed the Mobile Sauna. Trees were planted to offset the wood burned during the performance.