ok so I guess you are confused by the title already it's relatively simple in concept. I have a couple mobile radios in my car all going to the the "fuse box power connector" under the hood of my GM vehicle (2003 buick century) I want the ability to take my Alinco power supply with me and plug into a commercial power (120/240v wall socket) and sit in my car and power the radios.( required) I figured this is simple in theory all I would have to do is make an Anderson power pole connection at the car to the radios and some power poles on the end of my power supply, but as I wondered about this that would only power the radios no AC, lights in the car or anything else. is there a solution out there to power not only the radios but charge the battery, and run the AC, and everything else that would turn on if the ignition was on? is there a plug that can leave dangling from the battery for quick access. and one other thing I am thinking about is the possibility of running a computer in the car? I have a feeling that there is a well known product out there that will suit my needs.