It's hard for me to say exactly how many times you can start it before having to wait for the caps to charge back up, since we've measured a surprisingly high v

It's hard for me to say exactly how many times you can start it before having to wait for the caps to charge back up, since we've measured a surprisingly high variation of required starting current over a bunch of different cars. One of our testers drives a Datsun 240z (it's really sweet) and sometimes needs a few cranks to get it going. He hasn't had to change his behavior from his old battery, so he's getting at least a few attempts over a short period without needing to wait for recharging. One other cool trick we can do is charge the capacitors slightly higher to deliver more current on a second starting attempt, which will hopefully reduce the number of cranking attempts you need.