That is principally correct, and, in fact, a fixed voltage power supply with a resistor in series just works for charging NiMH/NiCd, yes. In Li-ion however, I

That is principally correct, and, in fact, a fixed voltage power supply with a resistor in series just works for charging NiMH/NiCd, yes. In Li-ion however, I think it's something like, max voltage ramp is limited even within current limit, then afterwards current is limited even below cutoff voltage, or whatever to similar effects. It's definitely more complicated than just constant max voltage fed through a 330R.