Yes, that's exactly the one. I bought one twenty years ago and it has saved me UNTOLD hours of misdiagnosing electrical problems on bikes and cars.
A battery cannot fool one of those things. It might read 12.7 volts at rest all day long, and people say "Oh, it's good, I tested it with a voltmeter", and then it dies as soon as a 30-amp load is connected across it.
A battery is one of the most fragile and failure-prone components on a motorcycle, but for some reason people think that they are unlikely to fail, that if they look good they must work good, if it is new or new-ish, it can't be bad, and that if a 12 volt battery reads 12 volts it must be a good one, when in fact a battery that reads 12 volts is as dead as Stonewall Jackson's horse.
I don't know how many times I've said "Load Test The Battery First", and folks don't do it, and a week later it turns out to be the battery.
If you're doing your own work, GET ONE!