15V out of CARS4700N?

Sorry, there seems to be no category for CARS4700N, so I try here to get help.

I bought the CARS4700N, it supplies my notebook very well. But I want to use it also for another purpose which needs actually 14 Volt, but I think I can as well use 15 Volt and a resistor.

But HOW can I get 15 Volt (as written in the description)? All plugs are designed for notebooks and get about 18 - 20 Volt.

Try this link