[kazinator]

I bought a Yamaha FX-500 processor in 1989. 29 years later, I did a mod to convert it to a batteryless NVRAM chip. The original button cell battery was still good; settings I last touched in 1990 were still being held.

Garage door openers can last 10-15 years too; those use the battery to transmit a signal, not just to hold a piece of SRAM alive.

The bathroom scale is just a poor electronic design.