Efest is your go-to answer for all things battery related. Vapers depend on quality batteries to keep their devices up and running year round. With the Efest 18650 smart battery charger you get the assurance of quality construction so your batteries won't break down over time. They also offer several different charger options designed to give you maximum charging capabilities in a safe and reliable format. With their battery bundles you'll get everything you need in one stop so you can get straight to vaping. You'll know it's an Efest battery by the bright purple battery wrap that keeps your battery safe wherever you are.