1. Often applied with a thermal battery or thermal energy storage devices. 2. A description of each type of Thermal Battery follows. 3. An example of an Encapsulated Thermal Battery is the average residential water heater. 4. GHEX thermal batteries are implemented in two forms. 5. There are some other items that have historically been termed " Thermal Batteries ". 6. Phase change thermal batteries can be thought of as tools to be applied to applications. 7. Typical substances used for these Thermal Batteries include water, concrete, and wet sand. 8. Some Thermal Batteries also involve causing a substance to transition thermally through a Enthalpy of vaporization. 9. Thermal batteries are very common, and include such familiar items as a hot water bottle.10. These drilled GHEX thermal batteries are also sometimes called " borehole thermal energy storage systems ".