Power consumption of Samsung NvME m.2 SSD

[modeonoff]

Hi, considering sevearl Samsung 1TB SSDs (mainly 860 EVO and 970 EVO) to put as secondar SSD in my Thinkpad. How much do they affect the battery life of the laptop? Are they almost the same? Also, how many minutes battery life will be shortened if I install two SSDs (one for Windows and one for Linux) instead of using just one SSD (partitioned to use two OS)?

 

[USAFRet]

The obvious place to look is directly from the manufacture, Samsung.
https://www.samsung.com/semiconductor/global.semi.static/Samsung_NVMe_SSD_970_EVO_Data_Sheet_Rev.1.0.pdf

The 970 EVO consumes 6 watts.
The 860 is probably similar.

You do realize those are two completely different protocols. Your laptop might not accept one or the other as a secondary drive.
You need to determine what it can actually use.