Hi Mike,
Exactly. I mean, I don't need to have a complicated charging procedure (I think it would be ok just to charge the battery with a I5 current till 2.4 V, no need for a constant voltage charging at 2.4 V). It's supposed to be something simple, but I also want to show the students that if they would like to treat the battery well so that it lasts longer, a more complicated circuit would be necessary.
I think for the discharge, a SOC-control would be great, but that might be also a bit more complicated, so I was really thinking about something like a voltage control. It wouldn't need to wait for the battery to be fully discharged at 1.8 V or something, something that turns off at around 1.9 V.
I will be talking a lot with them about quality control, so then I can point them what was wrong with our method of charging/discharging the battery.