Powerology Onyx 30000mAh Dual USB-C Power Bank 4 Device Charging - is a universal power source that can charge 4 different devices simultaneously in a parallel, safe, and high-speed manner thanks to its massive 30000mAh battery capacity and multiple outputs, including dual USB-C ports. Its powerful output interfaces restore the energy of smartphones, tablets, and compatible laptops in a short time, ensuring complete energy independence during long-distance travels. The ergonomic housing structure and built-in smart protection system fully safeguard connected expensive equipment from overvoltage, overheating, and short circuits.