Calfax 820-CD
The Calfax 820-CD is an arithmetic calculator with algebraic logic. It has an LED (light-emitting diode) display typical of calculators of this era. The power source is PP3 9V battery.
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Arithmetic |
| Logic | Algebraic |
| Display type | LED |
| Length | 140mm |
| Width | 77mm |
| Thickness | 35mm |
| Power Source | PP3 9V battery |
| Year introduced | 1975 |
Replacements:
If you have a Calfax 820-CD that is no longer working, you can first try replacing the PP3 9V battery. 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: