Education Technology

Solution 17009: Replacing the Battery In a TI-1795 SV.

What type of battery does the TI-1795 SV use and how can it be replaced?

The TI-1795 SV is a dual powered calculator using a solar cell and battery power as a backup in dim light situations.

The TI-1795 SV uses one GP-189 or a LR54 lithium cell battery.

About replacing the cell battery on a TI-1795 SV
For safety purposes and to prevent ingestion, the button-cell batteries in school, student-owned calculators, as well basic/elementary calculators without battery doors are not designed to be replaced. It is possible to replace the battery by removing the back case of the calculator, but opening the back of the calculator voids the one-year, limited warranty. This must be done carefully, as we cannot be held responsible for any damage caused when you attempt to replace the battery. However, if your calculator is already out of warranty, you might choose to remove the back case to replace the battery

To replace the battery:

1) Using a small Phillips screwdriver, remove the screws that are on the back of the unit. 
2) Carefully pry apart the back case and the front case. Be careful not to damage any internal parts. 
3) Remove the lithium battery carefully and replace it with a new one. 
4) After the lithium battery has been replaced, attach the back case of the unit on to the front case and replace the screws. 
5) Turn the unit on. The calculator should now function properly.

Safety precautions: 

1) Avoid contact with other calculator components while changing the battery. 
2) Properly dispose of the used battery immediately. 
3) Do not leave batteries within the reach of children. 
4) Do not incinerate batteries.

For more information regarding your Texas Instruments TI-1795 SV calculator, please refer to the guidebooks section.