The Efest K2 is a dual battery charger designed for on-the-go charging. Experience quick and versatile charging with the Efest K2 Vape Battery Charger. Utilising a 4.2V/1A charge, the K2 easily charge up to two batteries, such as 18650, 20700, or 21700 (batteries sold separately). The K2 features a vibrant LED display which displays the battery’s charging status. Experience simplicity and ease of use with this kit – no buttons or settings needed! Just insert your batteries and plug it in for effortless charging.? The K2 comes with a Micro-USB charging cable and is perfect for on-the-go battery charging. Say goodbye to complicated charging processes with the K2!