Smaller disposables (1g and 2g) are usually pre-charged, but larger sizes (3g, 5g, and 7g) may come with USB-C charging to ensure you can finish the oil before the battery dies.
Smaller disposables (1g and 2g) are usually pre-charged, but larger sizes (3g, 5g, and 7g) may come with USB-C charging to ensure you can finish the oil before the battery dies.