MustangChris429

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Nice job...but are you sure about your capacity calculations? A single D-cell rated at 12 amp hours does not increase in current capacity when placed in series. The voltage will increase of course, but the capacity in hours will be the same if you have 1 or 100 cells in series. The current will indeed be higher at lower voltages or as the load resistance drops. The only way to increase your load capacity from 12, to 24 to 36 amp hours, is to use them in parallel. In the Mag light scenario, the higher the operating voltage (the higher rated the bulb is)...but the current does not increase due to the different filament ratings. Kind regards...N1TI