2 batteries both 1.5V
Each battery has internal resistance, r=3 Ohms.
one Resistor R=50 ohms is in the circuit.
the first circuit is arranged with the two batteries in Series.
the second configuration puts the two batteries in parallel arrangement.
Which configuration produces more Power?
It's obvious that the series configuration will produce more potential and more current through the Resistor, R.
However, the parallel configuration can avoid more Power loss due to the lower current.
I'm not sure what is the advantage of arranging 2 batteries in the parallel configuration when this configuration produces less current to the Resistor R than the series configuration.