The Aspire K3 battery is a professional grade, top shelf e-cig battery. Housed in a real carbon fiber coated metal tube, the K3 battery is a beautiful piece of engineering guaranteed to satisfy! The K3 features an on/off button system for safety and 1200 mAH capacity to last a long time on a single charge. The K3 accepts a micro USB to charge (charger not included)and features a 'quick charge' system that gets you back up and vaping quickly. **Pair this battery with the Aspire Nautilus Mini tank for the ultimate vape!** When quality counts, you can count on Aspire to deliver!