The portable battery EV charger is a groundbreaking innovation designed to revolutionize the way electric vehicle (EV) owners charge their cars. This compact and lightweight device serves as a mobile power source, enabling users to charge their EVs anytime, anywhere. The main functions of the portable battery EV charger include charging EVs through a standard EV charging port, monitoring battery levels, and providing a safe and efficient charging experience. Technological features such as advanced battery management systems, high-energy density lithium-ion batteries, and smart charging capabilities make this device stand out. Applications of the portable battery EV charger range from emergency charging during long trips to daily charging at home or workplaces where traditional charging infrastructure is unavailable.