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:
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: