The Casio MQ-1 is an arithmetic calculator with 6 digits precision and algebraic logic. It has 4 functions, 23 keys, and one of the early LCD (liquid crystal) displays which incorporated a yellow filter. The power source is 2x1.5V cell. The calculator was manufactured in Japan.
Facts at a glance:
|Power Source||2x1.5V cell|
If you have a Casio MQ-1 that is no longer working, you can first try replacing the 2x1.5V cell batteries. 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: