There are batteries based on tritium that are supposed to (theoretically, not promised) last hundreds of years. Just google "Nano tritium battery"You need deep pockets though. I think I read somewhere they were nearly $2000 each.
The one thing you won't run out of in the next hundred years is curious people.
Quote from: westfw on Jan 28, 2013, 04:05 am-snip-But how do you figure out when the 100 years is up so you can trigger the battery? What triggers the battery?