Your best bet: Use the function to see what other users have done. I don't know if there's an '03 Accord, but I know for a fact there are other users with systems in Hondas.Originally Posted by Google
As far as power, there are two schools of thought:
Use a standard AC-DC power supply (any PC you buy will already have one) and a power inverter.
Pros: Cheap and readily available
Cons: Inefficent, may not survive crank
Use a DC-DC ATX-spec power supply. The two most common are from Opus or the Maestro Sproggy.
Pros: Efficient, survices crank, auto-on/off with ignition