To RUN a program, press PRGM.  Select the name of the program.  
            Hit ENTER.  The name appears on the home screen.  Press 
            ENTER.  
             
            To EXIT a program at any time, hit ON and choose QUIT. 
            
          While newer calculators use a cable/computer connection to recharge the calculator, the older models use batteries. 
             
            The older TI-83+/84+ use 5 batteries:  4 
                AAA alkaline batteries and one lithium battery.  The 
                lithium battery provides auxiliary power to retain memory while 
                you replace the AAA batteries.  When the battery voltage 
                level drops below a usable level, the calculator displays a 
                warning message when you turn it on. 
                When replacing batteries: 
              • 
                Do NOT remove both types of batteries (AAA and lithium) at the 
                same time. 
•  Do NOT mix new and old batteries.   
• Do NOT 
              mix brands of batteries. 
• Install batteries according to 
              polarity
              (+ and -).   
• 
            Always turn off the calculator when replacing 
          batteries. 
• Please, dispose of batteries properly. 
 
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