The Casio BF-80 is a finance calculator with algebraic logic. It has 40 keys, and an LCD (liquid crystal) display. The power source is 3V cell.
Facts at a glance:
|Power Source||3V cell|
If you have a Casio BF-80 that is no longer working, you can first try replacing the 3V 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 model as a replacement: