Hmm yes would be good.. No doubt it would be able to be done.. I'll have to ask my electrical engineering lecturer at uni.. See what he thinks on the situation lol.
That is true indeed! if only you could wire in a spare power source!
What about the cars that have the emergency system that runs off a separate power source? So if the battery dies it was still able to operate? I'll try find it...
EDIT: looks like it can be done sir.. http://www.powerstre...PS-1212-10A.htm