Batteries and chargers are essential to your e-cigarette. For a pack a day smoker we recommend at least 3 batteries and at least 2 chargers. Batteries are like a lighter, if you don't have one that is working you can't use it. 

In addition to extra batteries and chargers, we recommend other products that we ourselves use, such as our awesome and stylish portable charging case, and our very handy and powerful USB passthrough.