Hewlett-Packard HP 45 (Classic WIZARD)
The Hewlett-Packard HP 45 is a scientific calculator with 12 digits precision and RPN (reverse polish notation) logic. It has 56 functions, 35 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 Hewlett-Packard HP 45 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: