I'm curious of the lifespan of a mod with no use. My specific situation is I have a lot of mods with built in batteries. I was going to simply store a couple if I don't sell them. But I've heard the batteries can die over time if they just sit like that. Anyone have any knowledge on this? I could always break one out and use it for a day or 2 then charge it back up store it again, would that help? Or would they be fine regardless? I don't want to hear buy a mod with replaceable batteries lol, that simply does not apply right now.