In general the elex will last longer than the battery. Lots longer.
That's what I thought, thanks.
I'm already thinking about how to best store my extra mods long term. Right now I just stick them in heavy ziplock bags and add a few desiccant packs to keep them dry. Our friend Roxynoodle uses her vaccuum sealer, but I don't own one, yet. I may have to get one, eventually, if the FDA (and Sacramento) win.