bartamos An old guy once sold me a power pyle made into a 32 volt WW 2 generator /regulator testor. I learned with that outfit !! Later then got so I could afford Sun equipment,my current carbon pyle (Sun) will make any battery sweat . Take it to the woods junk yard when buying used batteries. The WW2 outfit is still working,and you can fix it if you hurt a component. May have to qualify that "fix" if you can find the component !! I have some of them on my shelf from the olden days of alternator "school".