@fastharry@OnionSoup Actually, starter current draw on most vehicles should be under 200 amps. I have one of these at work and use it often. Now HOW they manage to deliver 200 amps through what looks like 16 gauge wire with oversized alligator clips without melting is still a mystery to me, but it works.
@Steve7654 Small displacement 4 cylinder or one of those eco start/stop engines designed for quick restart might do with only 200 amps. But try that with an 8 or largish 6 cylinder after being dead overnight in winter and you’ll wish it had more CCA.