The Citizen SR-270N is a scientific calculator with 12 digits precision and formula input logic. It has 236 functions, 44 keys, and an LCD (liquid crystal) display. The power source is 2xLR44. The calculator was manufactured in Japan.
Facts at a glance:
If you have a Citizen SR-270N that is no longer working, you can first try replacing the 2xLR44 batteries. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent. We suggest the following current model as a replacement: