The Happy eGo batteries are available in both standard 3.3V and Spinner type variable voltage batteries that allow you to adjust the battery voltage from 3.3V to 4.8V by twisting the end cap! They also contains a 5-click on/off safety feature. To use this feature, rapidly click 5 times. The battery LED will flash indicating it is locked. To unlock the battery, click 5 more times. All Happy eGo battery sizes are compatible with all EGO style/510 products. The battery can be charged by connecting it to any USB port with the included Fast USB Charger.
Just drip the e-liquid into the clearamizer, screw it on to the battery, and you're good to go!
You might want to get some more e-liquid
This kit should give you all you need to get started. As the battery is a Happy eGo product, there are more options and add-ons available
for it than any other electronic cigarette on the market. In terms of expandability, the sky is the limit!