TEXAS Instruments TI-83  Graphing Calculator W/ Cover TESTED & WORKS EUC. This was one of my son's calculators he used back in the late 1990s.  I found it recently.  I also have the TI-84 I will be listing.  The battery compartment is clean without any battery arrossion & the calculator works flawlessly.  See pictures with the calculator using the batteries. Please contact me if you have further questions. ***Batteries Not Included