How do you make the greatest cartridges even better? Pair it with the best battery and charger of course! These batteries are engineered to give KLAR Premium Distillate Cartridges the smoothest, and most flavorful hits every time.These packages come with one battery and one USB charger so you can charge your pen anytime, anywhere. With a sexy, luxurious, and matte black you can’t go wrong. SLEEK, DISCREET, SMOOTH. These pens are engineered to give KLAR Premium Distillate Cartridges and any other 510 thread sized cartridge the most smooth and flavourful hits every time.