The Casio fx-81 is a scientific calculator with 9 digits precision and algebraic logic. It has 32 functions, 38 keys, and an LCD (liquid crystal) display. The power source is 2xAA.
Facts at a glance:
If you have a Casio fx-81 that is no longer working, you can first try replacing the 2xAA batteries. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent. We suggest the following current model as a replacement: