Driver led Schematic

I’ve have been searching for LED driver schematic diagram but can’t find it.
I would like a driver to power an xhp70.2 led at maximum power and I would like to be able to use either a 2S or 3S battery pack

any of you have anything to help me, I am a hobbyist with the desire and passion to want to try, I am not electronic
Is it available in this forum?