A masked battery refers to a type of device that is designed to hide its true function from the user or observer. There are a variety of synonyms for a masked battery, including disguised battery, covert power source, hidden energy cell, and concealed power pack. These terms all refer to a battery that has been intentionally obscured or disguised for a specific purpose such as security reasons or to maintain a sleek and inconspicuous appearance. Other related terms may include disguised power supply, stealth battery, and secret energy source. Regardless of the terminology used, a masked battery is an innovative technological solution that plays a critical role in various applications.