My solution for this use case is a used Thinkpad X270. Unreal battery life and adequate performance. Got mine in like-new condition a couple years ago for $90. It's a fine substitute for factory-spec e-waste. Mine has the cheapo screen, but it was a cheap laptop so whatever. I don't get the author's complaint about the "2K" (whatever that is) display. Cheap laptop has a cheap screen, oh the humanity!