Brother 813SR
The Brother 813SR is an arithmetic calculator with 8 digits precision and algebraic logic. It has 13 functions, 29 keys, and one of the early LCD (liquid crystal) displays which incorporated a yellow filter. The power source is 2xAA batteries. The calculator was manufactured in Japan.
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Arithmetic |
| Functions | 13 |
| Keys | 29 |
| Precision | 8 |
| Logic | Algebraic |
| Display type | YLCD |
| Length | 144mm |
| Width | 77mm |
| Thickness | 22mm |
| Weight | 127g |
| Power Consumption | 0.000500W |
| Power Source | 2xAA batteries |
| Country | Japan |
| Year introduced | 1979 |
Replacements:
If you have a Brother 813SR that is no longer working, you can first try replacing the 2xAA 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: