Second comment on ‘The most energy efficient way to charge the capacitor in a RC circuit’

In a recent reply to the paper (Oven 2018 Phys. Educ. 53 046501) it was argued that the analysis in the above comment was flawed in that the circuit used for the current generator was incomplete. The reply also analyses a current generator circuit to support the arguments and reasserts that the energy loss involved in charging a RC circuit is dependent on the charging rate. Here, the counter arguments in the reply are shown to be in error. It is demonstrated that the conclusions reached in the above comment remain valid.