Calculated Industries Construction Master 5 4050 Pocket Reference Manual page 35

BATTERY
This model uses one (1) CR2016 battery
(included). This should last approximately
800 hours of actual use (1 year plus for
most people). Should your calculator display
become very dim or erratic, replace the
battery.
While the calculator is off, turn the calculator
over and use a #1 Phillips screwdriver to
remove the battery holder screw located
near the center at the top. With the screw
removed, pull battery holder out, remove old
battery, and slide new battery into holder.
The negative side of the battery should be
facing you as you insert the battery holder
into the calculator. Replace screw using a #1
Phillips screwdriver.
Note: Please use caution when disposing of your
old batteries as they contain hazardous chemicals.
Replacement batteries are available at most
discount or electronics stores. You may also
call Calculated Industries at
1-775-885-4900.
RESET
If your calculator should ever "lock up," press
Reset – a small hole located below the p
key – to perform a total reset.
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ocket efeRence
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