Texas Instruments TI-89 Titanium
The Texas Instruments TI-89 Titanium is a graphing calculator with 10 digits precision and formula input logic. It has 50 keys, and an LCD (liquid crystal) display. The power source is 4xAAA + CR1620 3V. The calculator was manufactured in Taiwan.
Facts at a glance:
|Power Source||4xAAA + CR1620 3V|
If you have a Texas Instruments TI-89 Titanium that is no longer working, you can first try replacing the 4xAAA + CR1620 3V batteries. If that doesn't solve the problem, then a repair might be possible, although you have to weigh up the costs against just buying a new one, as this model is still currently available.