As the name suggests, pod systems are e-cigarettes that make use of a “pod” as opposed to a traditional tank or atomizer. They ultimately do the same job: they hold the e-liquid and vaporize it to deliver vapor to you through the mouthpiece. They often have a smaller capacity than most tanks, but the nicotine is generally stronger due to the nature of the very low-powered device. The pods simply push into place and pull out when you’ve emptied them.
These pod devices are designed for their own non-refillable pods. You are limited on the flavor and nicotine strength.
These pod devices allow you to manually refill your pods with nicotine salt e-liquid. Unlike the closed system devices, you can buy any bottle of nicotine salt e-liquid at varying nicotine strengths and flavors to find a flavor that suits you best.