There were several claims that modern alarm clocks, and most devices ... this I wondered how the clock could have a battery-backup if it is tied to mains? That’s actually a pretty interesting ...

These were chunky dual-in-line devices containing clock and non-volatile RAM chips, a crystal, and a lithium battery. The battery was good for about a decade, which was fine for most PCs of the ...

Removing a single tri-point screw on the bottom of the alarm clock allows ... CR2032 coin cell backup battery that’s used to preserve settings while the clock isn’t getting power from a ...