Carlos E. R. wrote:
But they started with car batteries, 6 or 12 volts. Otherwise, they could have chosen any random number or elements cells.
Except phone batteries and telegraph batteries before them predate car batteries. It wasn't until the 1920's that cars used a starter motor and early engines used magnetos for the spark plugs. The first battery driven ignition systems appeared around 1910. Early cars used gas lamps for lights, so there was no need for an electrical system & batteries for the early vehicles. On the other hand, batteries in telecom use go back to the 1850s. So, it was impossible for those to have been car batteries. They simply didn't exist back then. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org