The term 'ENERGY-FILLED CHARGERS' refers to a type of horse known as 'steeds'. Steeds are powerful horses that have been bred for speed and endurance, and they are often used in racing and other activities that require a lot of energy. They are also known for their ability to carry heavy loads over long distances. Steeds are typically strong, muscular animals that are full of energy and can be relied upon to get the job done.