The Technico 77SR is a scientific calculator with 8 digits precision and algebraic logic. It has 26 functions, 25 keys, and an LED (light-emitting diode) display, typical of calculators of this era. The power source is 3xAA.
Facts at a glance:
If you have a Technico 77SR that is no longer working, you can first try replacing the 3xAA 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: