Electronics 2000

Hello dears i am new here and don't have any experience in electronics but i want to learn it a bit for my daily use, The first thing is that I have a 12v7amp dc battery and have an internet device which works on 12v 1.5amps now i want to know what should i do to connect it direct with the battery when light turns off to use wifi on my laptop and mobile.

This is badly writen and dificult to under stand... if the bat is 12v ... is that 7A max or 7Ah? ... what ever... if what you want to run as a load is rated for 12v I dont see any prob ... plug in and play.