I completely agree, I started out with a Twisp Aero and then an iJust 2 (and I do budget for batteries every so often), but what does a week's supply of cigarettes cost compared to a battery or two, or even a cheap power bank?Agreed, but think of noobs who are starting out. My first mistake was not buying extra juice before i started the diy route. With diy, you always have plenty.
As for batteries, they arent cheap and i buy when budget allows.
There are other ways to charge batteries when the power fails, except if one lives on a rock in the middle of the ocean, or is stuck in the middle of the desert, or the bush, etcetera.