Cold Energy: This highlights the main target on storing prospective energy in the shape of noticeably small temperatures. It is the counterpart for the high-temperature energy stored in heat batteries. A patented cold thermal energy storage system from O-Hx works by using ice slurry to raise the efficiency of chillers. https://purethermal.co.uk/media-news/pure-thermal-webinar-can-icebat-cold-thermal-energy-storage-provide-an-alternative-cooling-design-option/