Stone Cold Systems (SCS) is transforming the cold chain for vaccines by delivering super modern, connected devices that provide actionable, real-time data to secure and optimize the supply chain for safe vaccinations worldwide. The main innovation consists of a transportable vaccine refrigerator purpose built for enabling mobile vaccination campaigns to reach underserved communities. SCS combines state of the art communications technologies with proven thermal electric cooling, powered by lithium-ion batteries and controlled by proprietary hybrid charging algorithms. This combination of functionality into one, easy to use portable device is the innovative and bold solution needed to fundamentally improve vaccination campaigns worldwide.