how to tell disposable vape is empty_e-cigarette vs cigarette

Glass Bell Tanks: The classic tank design where the main chamber is a clear glass tube. This allows users to easily monitor e-liquid levels. The glass is resistant to flavor staining but is vulnerable to breaking if dropped, so they often come with replacement glass sections.High-Puff-Count & Shisha Disposables Catering to heavy users and flavor enthusiasts, this category features devices with large-capacity e-liquid tanks (often 10ml+) and powerful batteries designed to deliver puff counts exceeding 5000. They are frequently paired with rich, complex "Shisha" or dessert-inspired flavor profiles that are popular in specific international markets. The emphasis is on lasting power and a intensely flavorful experience, making them a premium offering within the disposable segment for dedicated consumers.https://cbu01.alicdn.com/img/ibank/2017/661/405/3827504166_1775040252.220x220xz.jpgTouch Screen Box Mod Kits: Feature a full-color touchscreen interface that replaces traditional buttons and small OLED screens. This allows for an intuitive, smartphone-like user experience with easy navigation through menus, detailed data visualization (graphs, charts), and customizable themes.18650/21700 Batteries: Standardized, cylindrical lithium-ion cells that are removable and rechargeable. The numbers refer to their dimensions (18mm x 65mm, 21mm x 70mm). They are the power source for advanced mods, with different models offering trade-offs between capacity (mAh) and maximum discharge current (A).