Panasonic 840 (JE-840U)
The Panasonic 840 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 4 functions, 18 keys, and a VFD (vacuum fluorescent) display. The power source is 4xAA batteries.
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Arithmetic |
| Functions | 4 |
| Keys | 18 |
| Precision | 8 |
| Logic | Algebraic |
| Display type | VFD |
| Length | 140mm |
| Width | 83mm |
| Power Consumption | 0.500000W |
| Power Source | 4xAA batteries |
| Year introduced | 1974 |
Replacements:
If you have a Panasonic 840 that is no longer working, you can first try replacing the 4xAA batteries. 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: