Kato Electric's Magnesium Air Battery Mg:air is an emergency power source activated by adding saltwater. This compact, lightweight, and disposable battery offers a total discharge capacity of 4500mAh and an output current of 5000mA via a single USB Type A port, capable of charging mobile phones. Measuring 115x115x150mm, it also features an integrated LED light for illumination. Designed for disaster preparedness, it boasts a 5-year storage warranty and comes with salt bags, a stirrer, and a 50cm USB Type C cable for immediate use. Its simple activation process involves adding salt and water to the internal cells after removing the top panel, making it a reliable solution for off-grid power needs.