This all-new Joyetech Atopack Dolphin all-in-one system is just like the penguin. It's a compact refillable pod-based system with a built-in battery of 2100mAh and uses the new JVIC coil system. The Dolphin features a juice capacity of 6ml and has interchangeable pods. The pod system was designed to allow the user to change flavors whenever they please. This device can be charged via USB and can be charged up to 2A. The Dolphin makes for a great starter kit for those who don't want complications.