I just learned that the more a battery increases in capacity MAH, the more the amps decrease …

and i read that too :
“Ampere (A) characterizes the intensity, the power to simplify, maximum at which the battery can be used. The larger the number, the more power the battery can provide.”

so maybe if there are more amps the flashlight will give more lumens?
I found this table also the best battery but the ranking is from May 2018 :