Sharp EL-531WH (ADVANCED D.A.L.)
The Sharp EL-531WH is a scientific calculator with 12 digits precision and formula input logic. It has 272 functions, 47 keys, and an LCD (liquid crystal) display. The power source is 1xAA. Note: Available in a number of colours.
Facts at a glance:
If you have a Sharp EL-531WH that is no longer working, you can first try replacing the 1xAA battery. If that doesn't solve the problem, then it's probably easiest to just buy a new one, as this model is still currently available.