Key Features. Rugged Build Quality Water Ressistant IPX4 Can Be Recharged by USB (Universal Serial Bus) or by solar Energy Integrated Torch. 10000m Ah water-resistant power bank Solar charging 10000m Ah power bank with an integrated torch. Rugged design that is water & impact-resistant ready for what your next adventure throws at it. Highly efficient solar cells by a leader in solar cell manufacture SUNPOWER®. Cells are so efficient they even draw power on a cloudy day! Solaris can be recharged in two ways by USB (Universal Serial Bus) or simply take it to the great outdoors..