Roughly half of all the energy we harness is lost to the environment as low-temperature heat. Though the energy efficiency of many industrial processes has steadily increased over the years, the untapped potential of low-temperature heat is still enormous. In this talk, I will introduce a new take on an old battery concept to get a more useful power out of our energy resources. Though the weight of these batteries will likely keep them out of a car and many other portable devices,  their low-cost design makes them an attractive option for stationary power generation applications.