HP 33s Owner's Manual page 295

Rpn/alg scientific calculator
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Once you've removed the batteries, replace them within 2 minutes to avoid losing
stored information. (Have the new batteries readily at hand before you open the
battery compartment.)
To install batteries:
1. Have two fresh button–cell batteries at hand. Avoid touching the battery
terminals — handle batteries only by their edges.
2. Make sure the calculator is OFF. Do not press ON (
the entire battery–changing procedure is completed. If the
calculator is ON when the batteries are removed, the
contents of Continuous Memory will be erased.
3. Turn the calculator over and slide off the battery cover.
4. Never remove two old batteries at the same time, to prevent
lose memory. Remove one of the two batteries once. Press down the holder.
Push the plate to the shown direction and lift it.
File name 33s-E-Manual-1008-Publication(1st).doc
Printed Date : 2003/10/8
Holder
Support, Batteries, and Service
Page : 386
Size : 13.7 x 21.2 cm
Å
) again until
Plate
A–3

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