The Nova Mirage Thermal Painted 510 Battery is the perfect 510 battery! Conveniently pocket sized doesn't mean you lose out on any features- three heat settings, plus a preheat mode. This battery is rechargeable through a USB port, so no more worries about losing that tiny screw-on charger! The coolest thing? Each Mirage is finished with thermal reactive paint, so it CHANGES COLOUR when your hand heats it up! Grab one today!