1500mAh battery T20-S Prism Tank with 0.8ohm coil 18 watt output Top filling 2ml eliquid capacity Mouth-to-Lung vaping experience "No Spill" coil swap system Vape whilst charging The T20-S battery has an output of 18-watts with a capacity of 1500mAh and can be charged via the micro USB cable provided. You can even vape this kit whilst its charging which is an added bonus. The battery features a tri-colour LED light around the fire button Green/Yellow/Red to indicate when the battery is full/half/low. On top of the battery is the T20-S Prism tank which has a 2ml capacity that can be filled by removing the top cap. It houses a 0.8ohm coil, perfect for those thick high VG eliquids and slightly more vapour than its T18E predecessor. The Innokin T20-S Starter Kit is a mouth-to-lung vape that suits new vapers, or those who enjoy a MTL vape with smooth vapour production and quality flavour potential.