NEW! Our most compact and advanced battery yet. The brand new Mini Battery fits everything you love about Boost batteries into an even more compact device. Sturdy + precise hardware features a new digital screen for ease of use, more advanced user customization (1.8v-4.2v), and faster 10sec preheating function. Device is compatible with 510-threaded cartridges and USB-C universal charging cables. - New Digital Display - Extended Battery Life - Custom Precise Heat Settings (1.8v-4.2v) - Ultra Fast Pre-Heating Function - Power Saving Mode - Lots of Colors/Styles to Choose From SHOP HERE: www.boostmybattery.com