I m in god mode now. 

Guy installed T420 KB to T430/T430s/X230.

https://www.reddit.com/r/thinkpad/comments/..._install_guide/

https://www.instructables.com/ThinkPad-T430...c-Keyboard-Mod/

Feel like getting use Thinkpad model to learn Linux.
Which Thinkpad model and which Linux is recommended for beginner?

I kept my t430 until about a year ago, mostly usable running Win 10, even the battery can last 2 hours +.

Dunno why people want to go back to the T420 keyboard though.

The only issue is I encounter more and more videos that I cannot playback because of no HEVC support. I also do some transcoding. Have migrated to 6th gen CPUs for minimal HEVC support. X260 and E41. I just spilled some plain water on the X260 keyboard 2 days ago, now a few keys not working, they don't make it like they used to.....

This I agree, though up to x270, the battery bulges out and the flat battery is quite rare. And it has the powerbridge to run 2 batteries. I haven't found a machine with the internal battery though.

That's the reason I don't buy the shopee batteries, they don't last that long, difficult to find used original batteries still in good condition.

But I really like the Lenovos for their upgradability since a few generations (or even different models) will usually share common parts. The X260 battery I harvested from a dead T460.