A:AnswerI would use an universal laptop cable this product is not made for power hungry devices such a laptop and I'm fairly certain it was designed with radios, roku, clocks, etc in mind.
A:AnswerI don't know what a "Next Book Tablet" is. What I know of the product is that it has multiple different connectors. I bought the item to use with a portable DVD player. So, you may want to a chance on the item. I wish I could provide a better answer.