dono. Never quite understood that one and I don't have enough trial and error to render a theory. Have yet to fry an ECU or other similar type device.
I have messed up the TV images sets 2 houses away while AC tig welding using a 20HZ secondary wave along with the standard 60 cycle. Lady asked me if my TV was acting up and when I asked her what and more so when I triangulated back to my welding times. come to find out she was calling the cable co and even had them come out and was getting ticked after it kept happening but never when they were there. "Gosh, that IS strange. Well I better be going now"
I did a test and sure enough any kind of decent amps and it made a nice herring bone like in the olden days when a plane flew overhead. I found that wrapping the torch and work cables around each other from the machine to as close as I could and still work cleared things up.
I will see if there is more explanation to the battery thing.
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“Those that can make you believe in absurdities can make you commit atrocities.” Voltaire.
"There is grandeur in this view of life...." Darwin.
The mountains are calling and I must go.
“The earth has music for those who listen”
Shakespeare.
You Matter.
(Until you multiply yourself times the speed of light squared. Then you Energy)
“We’ve got lots of theories, we just don’t have the evidence’.