When less vapor is released as you inhale and exhale (on a fully charged battery), it's time for a new cartridge.
If less vapor is released even after you have replaced the cartridge, it's time to recharge the battery.
We worked diligently to ensure your cartridges last as long as any on the market. But we need to share an unfortunate truth with you – they don’t last forever. And overuse of an exhausted cartridge can result in bad flavor, burnt odor, and an overall foul experience.