FWIW -” Review: 4 way 16340 Test”:Review: 4 way 16340 Test
+1 to what chukhov and Pregulla said.
If you want capacity (fairly easily) you need an analyzing charger. If you want to understand batteries better……get and analyzing charger. You don’t have to be able to absorb all the details of HJK’s graphs and still have a working grasp of how batteries work. But once you do have working knowledge, then you can figure out the graphs.