I tried jump starting my aunts car and failed. What did start the care was my cousins nektech jumpstart device. Why one and not the other?
I'm on vacation so test equipment is in short supply. The dead car wouldn't even provide dash lights when connected to boost vehicle. I figured it should have started on cable boost or at least get lights. I'm thinking ratty booster cables.
It seems reasonable a cable boost or jumpstart work the same way. Curious minds want to know.