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.
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.