I am building a boom box that can run on a Battery or a 75 watt power supply. I want to run a diode inline to protect the power supply from the battery and vice versa. So I want to run a one directional diode to ensure power only flows OUT of either the battery or Power Supply. I want to buy the diode that cuts voltage the least. Ideally it would be 12Volt in and 12 Volt out... Which I don't think I'll find.
From what I've read it seems a Schottkey Diode is the best option for me. Any advice? I'm thinking of buying 2 rated at 3 AMP 12 Volt or 5AMP 12 Volt. Overkill i know.