It varies based on the specific car you have, but the short answer is "several". We've been measuring the current needed to start a bunch of different cars, and

It varies based on the specific car you have, but the short answer is "several". We've been measuring the current needed to start a bunch of different cars, and the results are pretty varied (based on temperature, engine compression, size, etc). One of our testers often needs a couple of starting attempts on his car and it sometimes takes him 3-4 tries before it starts with Ohm.