A: We are often asked why lower wattage bulbs should be used with our Simple Discharger as the battery pack is drained. The lower wattage bulb allows the battery to do more "work", taking a much longer time period to drain the battery. Because the pack can support the lower load for this longer period of time, more energy is able to be extracted from the battery pack.
Here is a comparison of an Insight IMA battery that is already "empty", i.e. drained to the bottom of its normal operating range. It is only able to support the load of a 200W bulbs for a couple minutes, but is able to carry the 15W bulbs load for almost an hour.
I'm planning to add a current logger as well to compare the amount of Ah extracted from the pack in each scenario as well. Stay tuned