Puff count is a starting point, not the full story
High puff numbers make disposable shelves easy to scan, but the number is still an estimate. Long draws, frequent use, higher-output modes, and tighter or looser airflow can change how quickly battery and e-liquid are used.
Rechargeable disposables keep the device usable as long as e-liquid remains. Check whether the listing mentions USB-C or charging.
Adjustable airflow and mode settings can change draw feel, vapour output, and how fast the device uses power.
Some models show battery or e-liquid information. That can help shoppers who want more visibility than a basic device gives.