So I'm planning on making an incredibly small lightsaber for my son who's a toddler, so to satisfy both his desire for a saber that isn't comparatively humongous and my desire for various character hilts, I'm going to make a Yoda saber, which, if all goes well, will end up at about 5.75". I know, I'm a lunatic.
Anyway, I was planning on using a Nano Biscotte (Biscotti?), and while 18650 batteries are generally recommended (and I already have some on-hand in preparation), for the sake of conserving space, what would be the downfall of using a 14500 in this single instance? And if that does end up being the route I take, would it be best to use the AA battery holder, and a dummy cell in one side so as to not overpower the NB?
Thank you for your assistance!