[smartmontools-support] estimated life of nvme

[James]

I wrote a script that estimates the life of my SSD by diving the total 
terabytes written warranty by the power on hours.
I think this works for one of my nvme SSDs but not for my new laptop.
It has a Model Number:                       KINGSTON RBUSNS8154P3128GJ1 
but power on hours never changes.
It is not 0 but has been 5 for many days.
Is there any other way to estimate the age of the SSD?