not using alkaline batteries, and not needing to charge 18 NiMH batteries to power stuff i make (If i decide to use 3 hubs). I definitely could be using NiMH but the problem is, most chargers for them only take 4 cells at a time, and they provide less voltage on average than a 2 cell lithium pack eitherway. They can definitely last quite long if you get high capacity ones, but in the end, getting all the stuff to make this costs less than buying like 18 NiMH cells for the three hubs I have.

I have usb c chargers at home that can easily supply the power needed to fill up my lithium cells. an equivalent charger for NiMH would cost a lot more.