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14
REPLACING THE BATTERY
Although your calculator uses solar power most of the time, the
backup battery will eventually become weak and need replac-
ing. If the display speed slows down in a dimly-lit room, replace
the battery with a RadioShack 389A type button-cell battery.
Caution: Always use a fresh battery of the required size and
type.
1. Use a Phillips screwdriver to remove the two screws on the
back cover of the calculator, then lift off the cover.
2. Gently pry out the old battery.
Warnings:
• Dispose of the old battery promptly and properly. Do not
bury or burn it.
• Do not allow children to play with the battery. Swallowing
a button cell battery can be fatal.
3. Position the new battery in the battery compartment so the
positive (+) side is up.
4. Replace the back cover, making sure both tabs on the top
edge of the back cover fit into their respective slots on the
front case. Then reinsert and tighten the two screws.