The Kanger UBOAT Replacement Cartridge proves it authenticity and quality 100% of the time. This cartridge calls for juice to be filled carefully into the opening. Once the cartridge is filled, the silicone plug is required to be placed back.
Kanger requires that the UBOAT Replacement Cartridge be held upside down for several minutes before vaping. This process, called "priming", ensures the cotton fully absorbs the juice and the coil doesn't burn when vaping begins.