Each Karma E Cigarette starter kit comes with everything you need to conveniently enjoy our electronic cigarettes. The sturdy storage case has a built-in battery to keep your electronic cigarettes going for over a week. At the push of a button, the battery meter displays the remaining power so you will always know when to recharge. This case stores and protects your accessories with one charging and one storage port for the two electronic cigarette batteries, and five storage ports for flavor cartridges or atomizers. Having an extra battery gives you the option of sharing the Good Karma.