My wife had a line of tealights she represented. We got a couple of hundred CR2032 batteries. I needed a battery for my NexGen, and just was lucky tolook at these, and didn't have to go buy any batteries. How long will these last? Should I keep them in the fridge? Most all are over 3v. I must have about 200 years worth of batteries here. What are they worth? What would you do with them all? Would ten of them go through the mail in the little flat tray they come in sealed in an envelope, or would they set off the mail alert devices? Can batteries even be mailed?