A wire from the cell can then be connected to a component like a bulb. And to complete the circuit you need to connect it back to the other side of the cell. Ah!

Multiple tests performed by Texas Biomed demonstrated a 95% reduction in the SARS-CoV-2 virus after 5 hours of exposure to the Particle bulb; a 99% reduction in 6 hours; and a 99.9% reduction in 8 ...

New energy-saving Type B LED T8 4-foot lamp eliminates the need for an electronic ballast or driver and consumes only 10.5 watts while delivering 1700 lumens May 15, 2024 11:52 AM Eastern Daylight ...