I've been using a step-up converter for a while now. I"m not sure if thats appropriate though. Its worked fine so far. if the voltage is over 12 volts I believe I just get the input voltage, if its under 12 volts it provides a constant 12 volts. I'm using a 3s system, so I know I could use an LC filter, but I figured if my plane goes down I want to have video as long as possible. What are the advantages / disadvantages of each?