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23
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
389A-type button-cell battery (RadioShack
Cat. No. 23-117).
Caution: Use only a fresh battery of the re-
quired size and type.
Follow these steps to replace the battery.
1. Use a small Phillips screwdriver and
remove the two screws from the lower
case.
65-538.fm Page 23 Monday, December 13, 1999 9:15 AM