 KULR Technology Group Inc NYSE:KULR said it has started phase 2 in the development of passive propagation resistant battery systems for Lockheed Martin NYSE:LMT Corporation, following a successful phase 1 trial last November. Testing for phase 2 began in the summer of 2022, using KULRs recently implemented bomb calorimeter, which measures the total heat generated in a particular reaction, and leveraging its technological advancements in passive propagation resistant PPR energy products for Lockheed Martin NYSE:LMTs Advanced Energy Systems, the San Diego-based company said. 