How long can an unpowered NVME hold data?

[Hostile_18]

Considering putting an NVME I have in an enclosure and using it as backup. How long can I leave it without electricity before it loses data?

The other question is can I plug it in before x number of months/years and be good for another set of months/years or does all the data on it need to be re written?

I did a bit of goggling but the answers were mixed and years old.

 

[Hostile_18]

It Will depend on the exact chips on the board and the capacitors on the board.

I would guesstimate it will do a year, I've had lots of USB drives last longer than that - but for anything I want assurance over I still have that on multiple hard disks personally (in fire safes and at least one off site).

Edit because I hit send before adding this: The only way to get you the correct answer will be to see if the vendor has a detailed datasheet with that parameter listed (something like a WD red or equivalent NAS type nvme might have that detail?)

Thank you. To be fair I don't mind plugging it in every 6 months or whatever the case may be.