The Cygnett ChargeUp Outback 20K (3rd Gen) is a rugged, 20,000mAh portable solar power bank designed specifically for outdoor environments. It features semi-solid state battery technology, which offers improved safety and thermal stability compared to traditional lithium-ion batteries. Superior battery tech for outdoors Outback features a semi solid-state battery for superior heat resistance and drop protection compared to traditional lithium batteries. Perfect for camping, hiking, and off-grid adventures. Rugged design With an IP54 rating, Outback is dust- and water-resistant, built to withstand the elements and keep your devices powered no matter where you roam. Recharge two ways Charge your Power Bank quickly via USB-C, or use the built-in solar panel to recover enough power in an emergency when you're off the grid.