Tandy EC-4020
The Tandy EC-4020 is a programmable calculator with 10 digits precision and formula input logic. It has 95 functions, 44 keys, and an LCD (liquid crystal) display. The power source is 2xCR20323V cell. Note: Radio Shack, Casio fx-4000P
A sample of this calculator is held in the calculator.org collection.
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Programmable |
| Functions | 95 |
| Keys | 44 |
| Precision | 10 |
| Logic | Formula |
| Display type | LCD |
| Length | 131mm |
| Width | 72mm |
| Thickness | 11mm |
| Weight | 75g |
| Power Consumption | 0.008000W |
| Power Source | 2xCR20323V cell |
| Year introduced | 1985 |
| Year discontinued | 1991 |
Replacements:
If you have a Tandy EC-4020 that is no longer working, you can first try replacing the 2xCR20323V 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: