The Sharp EL-9900 is a graphing calculator with 10 digits precision and formula input logic. It has 54 keys, and an LCD (liquid crystal) display. The power source is 4xAAA + CR2032 3V.
Facts at a glance:
|Power Source||4xAAA + CR2032 3V|
If you have a Sharp EL-9900 that is no longer working, you can first try replacing the 4xAAA + CR2032 3V 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: