mophie juice pack powerstation® PRO
When we say this thing is rugged, we mean it. With a rating of IP65, the powerstation PRO has been tested using international standards for dust and water resistance (IP = Ingress Protection).
A rating of 65 means that this device is totally dust-proof (with the ports closed) and resistant to water being sprayed at it with a water-jet. Getting the powerstation PRO wet is no big deal (even in the shower*), but don’t try taking a bath with it.