Credit: Heriot-Watt University Exploring extreme environments can put significant operational challenges on the engineering systems we depend upon to safely explore and at times operate within. Within high-value and safety-critical applications, such as space exploration or sub-surface drilling, the extreme and at times dynamic operating conditions within the environment, can make it challenging to understand the life expectancy of critical components and sub-systems. Hence, it's a highly complex and at times impossible situation to accurately understand therefore predict. To have safe, resilient and economically viable operations within these challenge environments, it is vital to understand the effect of high temperatures on critical devices, such as Electrochemical Capacitors (EC's). In comparison to a battery, ECs, also known as supercapacitor, ultracapacitor, or electrochemical double-layer capacitor, can withstand high discharge-charge currents and thus are suitable for withstanding peak power demands. An EC's long cycle life when operated in a high-temperature environment makes it ideal for challenging and extreme environments.