Wanting to build a charger/analyzer

Am I saying that right? I see tons of charging boards out there for about five bucks or so. Is there any out there with a digital screen that will test 18650 batteries for capacity? I’d like to test all my batteries to see how they are holding up.

There are nice budget analysing chargers

Those boards have just a simple charge

+1

Just get a Lii-500 or a Opus C3100

Thanks! What about the xtar vc4?