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Clockwise from bottom right: T410s, T420, T520, T500, T410

Clockwise from bottom right: T410, T410s, T420, T520, T500

The 14 inchers. T410s is surely the best for slipping in a backpack but a depreciated Panasonic 6 cell is only enough for one class.

T520 and T500
15.6" and 15.4"
FHD and WUXGA
Touchpad sticker removed on T520.
Both my 15 inchers have aftermarket screens.
The T520 has an Innolux N156HGE-L11 from a Dell Something rated 300 nits and 600:1 contrast ratio.
The T500 has an LG Philips LP154WU1-TLC1 from a Dell Alienware Area 51 M15X rated 210 nits and 500:1 contrast ratio, but 60hz only... confounded gaming specs.




Complete stack.

Classic ThinkSpiral.
Of these laptops the T520 has the greatest screen for sure followed by T500 then T410, T410s, T420. Despite 1280x800 and the low contrast ratio the T410's AUO B141EW05 has better viewing angles and color accuracy than the T410s' Toshiba 1440x900, and they all have better vertical viewing angles than the T420's LG 1600x900.
The T420 is built from a liquid damaged motherboard+base built up with a dead T420's palmrest, lid, and screen, and a keyboard from a laptop that didn't need it. The liquid damaged board died the day after I tested it with my EGPU but it was working reliably before. A new motherboard later and it's running again.
The T520 came to me needing a new keyboard and a screen. The Samsung 1366x768 had pressure marks. I already had the Chi Mei and needed only the T520 so I could install it. Keyboard is a minimally used NMB that clattered in the T410s but fits snug in the T520.
The T410s now has a Chicony I had in my T410.
The T410 gets the spare parts keyboard with a dysfunctioning delete key. It's a spare laptop at this point, light, reliable, takes a 9 cell, but the value is too low to profitably sell. I'm stuck with it and it's stuck with me.








