well Im no engineer, but

its all about a circuit collapsing.

Why do some Ford truck starter solenoids need to be diode supressed?

Why do computers switch the ground and not the positive?

What makes points erode away?? its only low voltage passing though them isnt it. Why do they spark??

Why do A/C clutches have clamping diodes on them?? To prevent the spike.

What spike?? ??

Go put a voltmeter on your battery charger, without hooking it up to a battery, just connect the leads, then, turn it on to "boost" check the voltage now. Where does it go when you hook up the battery again??

theres your spike.

and tell me, what separates new technology from old technology?? a transistor is a transistor, lots are protected, but how many arent? and do you think the protected ones would be in the new stuff or the old stuff??

again, no disrespect implied, but nobody better be disconnecting a battery with the car running. I dont care how old it is.