Apologies if this is already answered somewhere, but I could not find an answer to this in any of the FAQs; and despite having two builds under my belt, and the electrical engineering part of this whole process is still new to me.

Basically: What are the pros and cons of these two batteries?

From what I can glean from some basic Googling, 14650 7.4V 1050mAh has more "potential power", and the 18650 3.7V w/ 3120mAh has more "total power."

So is this basically a question of current vs. capacity? (I REALLY hope I am using those terms correctly LOL)

I.E. the 14650 will run the saber brighter/louder for less time, and the 18650 will run the saber dimmer/more quiet for a longer time? And if so is it really that noticeable?

Is this correct?

If it matters, I am trying to wire:
PCv3
PEx
Luxeon RGrB LED
RGB Crystal Chamber LED
4 Accent SMD LEDs

and POSSIBLY going "all out" on the board and wiring:
Power On Indicator LED
2 Power On Progressive LEDs

Thanks so much in advance!