I have added 12 volt strip lights to my boat and I plan on powering them by craftsman 20 volt tool batteries. Do I need to run a step down converter to reduce the voltage to 12 volts and if I do what kind to buy. I am not electronic smart so any help will be greatly appreciated. I also am making my 360 mega portable and powering it by 20 volt batteries. Is there a problem with this thanks in advance Don