Does it really matter how many nine volt batteries are used in the nine volt battery generator?
Between two and four nine volt batteries are ideal. The four battery method is truly the most desirable configuration if there is no other circuitry involved. With the simple setup, one can gain more command over the electrolysis reaction by removing a battery at different intervals. This reduces the voltage and increases the actual production time. As low as 1.5 volts can be used. Keep in mind, however, that the generation time is increased as the voltage is lowered. If one is interested in improving the design, the next step would be to limit or control the actual current involved in the process ( between .7 and 20 milliamps ). The second step is to increase the water circulation via thermal heating, mechanical stirring, or water circulation. The third step is to employ properly executed reverse polarity. The fourth step is to eliminate air from the production process.
