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To change batteries, you should first have the replacement batteries at hand (two CR-2032
Lithium batteries are required) and a small screwdriver to remove the two screws on the back of the
calculator. Make sure you install the new batteries with the same orientation (plus and minus) as the
original batteries (this is also shown on a diagram on the inside of the back cover).
The CR-2032 battery is available at Radio Shack stores, camera or electronics stores, and
other places that sell small batteries. It is round, about 0.75 inches (19 mm) in diameter and 0.125
inches (3.175 mm) thick.
Click here for detailed instructions on changing
the handheld calculator batteries (instructions are also in the User's Guide).
If you need assistance in changing the batteries, contact our office at 1 800 843-7766
between 9 AM and 5 PM Eastern Time, Monday through Friday.
You may have to setup the calculator after replacing the batteries. See Setup Codes or 623N User's Guide.
If the calculator still does not work, the calculator and/or card are probably defective and
need repair. The calculator and card should be Returned for
Service.
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