Uwell Caliburn X
This device has an integrated 850mAh battery, 5-20W output range. Constructed from durable aluminum-alloy which makes the Caliburn X strong and resilient against falls and drops (to some extent of course).
Unlike the previous Caliburn devices, this pod system holds 3ml's of liquid and comes with a screen so that you can pick the perfect wattage for you.
This device is for sure going to give you plenty of vapour throughout the day, making this an easy choice.