Searching for compact and throw

I see for this flashlight amp goes from 1.8A to 3.5A. So are every 18650 good for that?

My problem is I don’t understand very good english so the choice for battery is complex. I understand that the manufacturer’s features are often wrong. Have you got batteries ’s recommendations in the same range of value for money that the eagle eye X6 ?

I think I will buy an Xtar MC1 charger, but I don’t know if 1A is better than 0,5A?

I see on the forum there are a place to questions about battery, if needed i can open a new thread.