Am I missing something? :thinking: Why not simply use 16340s/16650s? They've became really good recently. E.g. Keeppower.
That's my plan when I finally decide to get Charlie with AVS head.
I consider Malkoff offering 16650-based lights a highest approval for these cells.
Simple. 700mAH (16340) vs. 3400 mAH (18650).