Regulated vaping mods are the power source of your vape! They feature either internal batteries or they have compartments for external batteries. Mods with internal batteries are charged via USB where as vape mods that have external mod batteries can be charged by USB (if the mod allows this) or by charging the external vape mod batteries with an external battery charger. We always recommend charging your batteries with an external charger even if your mod has a charging option to ensure the longevity of both the vape mod and the batteries themselves!