Tugboat EVO 4500 puffs have an 850mAh battery built within them, which increases their lifespan and steadiness. You have great discretion over which sweet flavour to choose because of the 10ml e-juice capacity. Tugboat EVO 4500 puffs vaping is normal because it doesn't need to be maintained or refilled. On the exhale, there is enough atomization due to the combination of the adjustable airflow and the built-in 1.2-ohm coil.