Here’s a fun entry into our coin cell challenge. The power source is the actuating force in [Frank]’s blinky LED Christmas tree, which takes advantage of the physical structure of coin cells ...

CEDAR RAPIDS — Multiple extension cords needed to power up public Christmas tree light displays across Cedar Rapids have been stolen in the last couple weeks as police look to arrest the thief ...

strung together along a single power cord, to light the Christmas tree in his New York home. Some sources credit Edison himself with being the first to use electric lights as Christmas decorations ...