Two ordinary wet cell batteries can either be connected by series or by parallel.
What happens if I have a contraption that enables these connections to alternate between series and parallel cycles in such a way that, in one cycle (first cycle) it connects these two batteries in series. In the next cycle (second cycle) it connects these two batteries in parallel connection.
The contraption moves fast (30 - 100 times per second) between series connection and parallel connection so that it becomes almost series/parallel "at the same time".
Can these two batteries in the first cycle (series) be arranged to discharge the battery and in the second cycle (parallel) be arranged to charge these two batteries?
If so, can we have the possibility of a battery system that can charge and discharge "at the same time"?