density oxygen copper core provides conductivity, stable voltage, reduced overheating risk, and lower resistance for improved energy efficiency; the core is not doped with aluminum. Durable aluminum alloy outer shell is lightweight yet sturdy, helping to resist drops and impacts. An integrated cooling fan delivers fast heat dissipation, prevents bottlenecks, extends service life, and reduces heat buildup. Portable and spacesaving design is easy to store in a toolbox or armrest box. Compatible with 12V, 24V, 48V, 60V, and 72V battery systems to power devices at home or outdoors, suitable for emergencies, hurricanes, storms, and power outages. Main use: equipped with a universal power socket for multifunction charging, making it suitable for powering televisions, mobile phones, laptops, car refrigerators, cameras, camping equipment, and mobile office equipment. Use scenarios Home outage backup: connect to a supported battery system to power essential devices such as a television, mobile phones, and laptops during power outages. Outdoor work or camping: reliably power laptops, phones, cameras, camping gear, and a car refrigerator while camping or at remote work sites. Emergency response during storms or severe weather: provide reliable power to communications devices and other critical electronics when grid power is unavailable.