I've had bad luck at some FLAPS. Just kept trying till I find a person who knows how to load test and show me.
Most just tell you it's OK, it has 12+ volts (or I guess 6+ volts). Autozone happened to have the winner. It's not easy. Just hand held stuff no good big machines left. Test is at 1/2 the CCA for 15 seconds. Then read voltage.
When will you be converting to 12V/alternator? Now? Monday?


Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn