Brand: CEDAR
Model: CD-B71
Type: Calculator
Picture: Yoko CD-B71
Batteries: AG10 x 1
Lifetime: Introduced: unknown
Terminated: unknown
Notes: Small calculator with square roots, percentages and memory.

The "Solar Cell" on this calculator is actually completely fake. Really. I even opened the case to check, it's just a decorative piece of plastic. Given the amount of detail I wonder if producing a calculator with a fake "Solar Cell" actually cheaper. Makes me wonder as well if there's anything in the manual about the fake "Solar Cell".

Negative numbers are indicated using a "-MINUS" symbol at the top-left of the display. There are two very small buttons, one for calculating square roots, the other to change the sign of a number.