The Sharp EL-509D is a scientific calculator with 10 digits precision and algebraic logic. It has 58 functions, 44 keys, and an LCD (liquid crystal) display. The power source is 2x1.5V cell.
Facts at a glance:
|Power Source||2x1.5V cell|
If you have a Sharp EL-509D 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 model as a replacement: