9
Replacing the Backup Battery
The backup battery can support the solar cell for approximately seven years at room temperature
(20°C/68°F).
If a weak battery is left in the calculator, the memory contents may be lost.
When to replace:
•
At least once every seven years, even if the calculator is functioning properly.
•
The memory contents become null.
•
The display dims in dark places.
•
The display will not appear in insufficient lighting by pressing the key after the power is
automatically turned off.
QS-2130(U1E) 09.5.15, 2:56 PM9
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