I want to know how you can turn down the amps and crank up the volts from any car battery. This is what I am going to use to slit Hydrogen and oxygen from water. (H2O) Also converting the O1 into O2. I believe a system that uses around 300w can produce the most hydrogen. Correct me if I am wrong. I am trying to build a Hydrogen Engine prototype that would not need outside air to burn back into water. This type of engine would theoretically be able to run underwater for long periods of time without using the extra air, and saving space. The problem is using a 24V system but converting it at last second to split the atoms with around 300w, and a normal car battery has around 200-1000 amps. I need around 12.5A. I only have one possible solution and that is to run it at 1.5-.3 to keep with in 300w, but I also want it made fast.