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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. The calculator was manufactured in Japan.

Facts at a glance:

FeatureValue
TypeArithmetic
Functions13
Keys29
Precision8
LogicAlgebraic
Display typeYLCD
Length144mm
Width77mm
Thickness22mm
Weight127g
Power Consumption0.000500W
Power Source2xAA
CountryJapan
Year introduced1979

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:

See other calculators by Brother