in the absence of a schematic, i assume the the load is in series with the resistor in series with the battery
therefore, your circuit looks like a battery with two resistors, all in series
the current out of the battery and the current in the series resistor and the current in the load are all the same.
one cannot be 200 mA while the other is 300 mA
for better help. please provide a schematic,
or sketch out what you are thinking about the connections between the battery, the series resistor and the load.