The RFT MR511 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 26 keys, and one of the early LCD (liquid crystal) displays which incorporated a yellow filter. The power source is 2x1.5V mercury cell.
Facts at a glance:
|Power Source||2x1.5V mercury cell|
If you have a RFT MR511 that is no longer working, you can first try replacing the 2x1.5V mercury cell 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: