Radio Shack EC-309
The Radio Shack EC-309 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 6 functions, 28 keys, and an LCD (liquid crystal) display. The power source is 3V cell. Note: Storage for phone numbers.
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Arithmetic |
| Functions | 6 |
| Keys | 28 |
| Precision | 8 |
| Logic | Algebraic |
| Display type | LCD |
| Length | 110mm |
| Width | 68mm |
| Thickness | 8mm |
| Power Source | 3V cell |
| Year introduced | 1988 |
| Year discontinued | 1988 |
Replacements:
If you have a Radio Shack EC-309 that is no longer working, you can first try replacing the 3V cell. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent.
We suggest the following current models as possible replacements: