A:AnswerThis universal power supply is good for almost anything (except laptops) which require an external power supply of 3 to 12 Volts.
For laptops they have a 19V with multiple tips (NS-PWLC591-C) I've also used.
Not sure about your "Stargazer", as I knew them as *all manual*, not computerized nor motorized.
A:AnswerI'm assuming your meaning 1.5amp hoverboard. And it depends on the voltage. From what I've seen the majority of hoverboards are 24 volt. And if that's true the answer is no. If it was a 1.5 volt hoverboard that would mean it runs off a single AAA or single D battery