FRAM – providing reliable data retention for 151 years

https://en.wikipedia.org/wiki/Accelerated_aging

primarily using heat. In this case, they didn't seem to mention how they validated that their accelerated aging test accurately reflects the behavior of the device in real aging (which apparently is a common concern about accelerated aging -- what if there's a different physical process that occurs with time but that you didn't manage to accelerate by your test?).