Good link to another topic. But I wonder - who said the OP was looking for a "charger" as opposed to an EVSE? Or are you splitting hairs here and emphasizing correct nomenclature?
As for the link to the article, I'm not sure this is helpful. In the article they say "How much does your car accept? Most cars fall into two charging levels: 16A or 30A. Some take more, 32A, 40A and even 80A. The more the car can accept, the faster you can charge it. Once you know how much electric current your car can accept, you can decide on the size of the wall unit."
I don't think this is true, is it? It is my understanding that the Leaf comes from the factory with either a 3.6kW or a 6.6kW charger built in. If you get the quick charger option, then it is even higher than that. So the car doesn't accept a given current, it allows a certain power level. So, if you have a 120V supply, a 3.6kW charger could accept 3.6kW/120V = 30A if it were available on that 120A circuit, or 6.6kW/120V = 55A from the larger charger. Of course, I don't think 120V circuits are available that deliver 30A or 50A. That's a big current. So you go to a 240V circuit where you could accept either 15A or 27.5A, depending in the power of the charger.
So, can the car accept a certain maximum current, or is it regulated by the maximum power of the charger, in which case the maximum current accepted depends on the circuit?
Of course, for the OP, this may all be irrelevant...