Texas Instruments TI-82 STATS Manual Book page 417

Replacing the
Batteries
To replace the batteries, follow these steps.
1. Turn off the calculator. Replace the slide cover over the
keyboard to avoid inadvertently turning on the calculator.
Turn the back of the calculator toward you.
2. Hold the calculator upright. Place your thumb on the oval
indentation on the battery cover. Push down and toward you
to slide the cover about ¼ inch (6 mm). Lift off the cover to
expose the battery compartment.
Note: To avoid loss of information stored in memory, you
must turn off the calculator. Do not remove the AAA
batteries and the lithium battery simultaneously.
3. Replace all four AAA alkaline batteries at the same time. Or,
replace the lithium battery.
To replace the AAA alkaline batteries, remove all four
discharged AAA batteries and install new ones according
to the polarity (+ and N) diagrams in the battery
compartment.
To remove the lithium battery, place your index finger on
the battery. Insert the tip of a ball-point pen (or similar
instrument) under the battery at the small opening
provided in the battery compartment. Carefully pry the
battery upward, holding it with your thumb and finger.
(There is a spring that pushes against the underside of the
battery.)
Install the new battery, + side up, by inserting the battery
and gently snapping it in with your finger. Use a CR1616
or CR1620 (or equivalent) lithium battery.
4. Replace the battery compartment cover. Turn the calculator
on and adjust the display contrast, if necessary (step 1; page
B 4).
.
General Information B–3