The Smoke NV Power Case is a portable charging case that allows you to charge your Smoke NV device anytime and anywhere. Never be caught without a way to charge your Smoke NV Device. Sleek Metal Design. Charge Anytime & Anywhere. LED battery level indicator. Holds one battery & two cartridges. Pre-charge your Smoke NV Power Case on your USB port, or USB home charger, and take it with you!