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Casio CQ-1 (COMPUTER QUARTZ CQ-1)

Casio CQ-1
Image: Joe Haupt, CC BY-SA 2.0

The Casio CQ-1 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 4 functions, 23 keys, and a VFD (vacuum fluorescent) display. The power source is AA+2x1.5V mercury cell batteries. The calculator was manufactured in Japan.

Facts at a glance:

FeatureValue
TypeArithmetic
Functions4
Keys23
Precision8
LogicAlgebraic
Display typeVFD
Length64mm
Width144mm
Thickness32mm
Weight124g
Power Consumption0.150000W
Power SourceAA+2x1.5V mercury cell
CountryJapan
Year introduced1975
Year discontinued1977

User Manual

You can download the Casio CQ-1 manual from this external link.

Replacements:

If you have a Casio CQ-1 that is no longer working, you can first try replacing the AA+2x1.5V mercury cell battery. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent. We suggest the following current models as possible replacements:

See other calculators by Casio