The Elektronika B3-21 is a programmable calculator with 8 digits precision and RPN (reverse polish notation) logic. It has 29 keys, and an LED (light-emitting diode) display, typical of calculators of this era. The power source is 4x1.5V sealed.
Facts at a glance:
|Power Source||4x1.5V sealed|
If you have an Elektronika B3-21 that is no longer working, you can consider replacing the calculator with a modern equivalent.
We suggest the following current model as a replacement: