That does not have one. If you are going to use a PT with a laptop you might want to either get a powered usb hub or an inline one. The cord will have a box on it in the middle.
Laptops tend to not be able to handle the voltage of some passthroughs thus frying the usb ports. An inline battery is a PT with a battery in the middle of the cord that makes sure your voltage stay at 3.7
When you dry burn just do it for 5 seconds at a time lighlty blowing in to the atty. Then when ready to prime it again, drip two drops of juice on the atty and let it set for 5 min. Then you will be good to go.