HP HP-20S - Page 114

To install batteries:
1.
4.
Have three fresh button-cell batteries at hand. Hold batteries by the
edges. Do not touch the contacts. Wipe each battery with a clean,
lint-free cloth to remove dirt and oil.
Make sure the calculator is off. Do not press again until the
entire procedure for changing batteries is completed. Chang-
ing batteries with the calculator on can erase the contents of
Continuous Memory.
Hold the calculator as shown. To remove the battery-
compartment door, press down and outward on it until it slides
off (away from the center).
Turn the calculator over and shake the batteries out.
%‘ Do not mutilate, puncture, or dispose of batteries in
fire. The batteries can burst or explode, releasing
Warning hazardous chemicals.
5.
112
Hold the calculator as shown and stack the batteries, one at a
time, in the battery compartment. Orient the batteries according
to the diagram inside the battery compartment. Be sure the
raised and flat ends match the diagram.
Assistance, Batteries, Memory and Service