I used 1930s film cameras for a long time. Some air safety crew insisted that I turn it on before I could board an airplane. Their supervisor straightened it out. I thought it was funny. Don't need no stinkin' batteries.
My GF gave me a fitbit and told me not to wear it beside my watch since the electronics would mess with it. I Just grinned .. then she remembered my watch is a wind up and doesn't use a battery. Heck, one car I had in high school had a wind up clock on the dash.