Casio fx-250B
The Casio fx-250B is a scientific calculator with algebraic logic. It has 38 keys, and an LCD (liquid crystal) display. The power source is 2x1.5V cell.
Facts at a glance:
| Feature | Value | 
|---|---|
| Type | Scientific | 
| Keys | 38 | 
| Logic | Algebraic | 
| Display type | LCD | 
| Power Source | 2x1.5V cell | 
| Year introduced | 1985 | 
Replacements:
If you have a Casio fx-250B that is no longer working, you can first try replacing the 2x1.5V cell. 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: