A:AnswerHi,
Thank you for your interest in our AC Adapter. For you to use this AC adapter with your DVD player, it is necessary to double check on what is DVD player wattage needed and also the polarity, then compare it to see if it is compatible. This AC adapter is a positive outside, negative inside tip that can support 3V, 4.5V, 6V, 7.5V, 9V or 12V DC output and gives about 15W. However, if you need further assistance or you more information, we are here to help you. Feel free to contact us at ww.insigniaproducts***/contact-us.
Karina R. - Insignia Support
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.