Astrolux FT01 XHP50.2, Battery recomendation

Newbie here, first question I have on order a Astrolux FT01 XHP50.2 looking for a battery recommendation, eyeballing the Samsung 50E looks like 9.8 amps continuous discharge.

Second question which one of you guys gave me this new ADDICTION ?

Already purchased about 20 flashlights and lots and lots of batteries.