If you are looking for something that lasts a little longer, we have a brand new Silo Box Battery that you are going to love! This beast will make it though the largest vaporizer cartridges on a single charge, and works without buttons as well! The kit includes a convenient USB charger and an adapter that you can screw onto the bottom of your cartridges. This makes swapping strains effortless, as you no longer have to screw and unscrew the cartridge. Just pull up and replace using the magnetic force!