Power Supply - Casio fx-100W User Manual

® Power Supply
The type of battery you should use depends on the model
number of your calculator.
<fx-991W/fx-115W>
The TWO WAY POWER system actually has two power
supplies: a solar cell and a G13 Type (LR44) button bat-
tery. Normally, calculators equipped with a solar cell alone
can operate only when relatively bright light is present.
The TWO WAY POWER system, however, lets you con¬
tinue to use the calculator as long as there is enough light
to read the display,
* Replacing the Battery
Either of the following symptoms indicates battery power
is low, and that the battery should be replaced.
• Display figures are dim and difficult to read in areas
where there is little light available.
• Nothing appears on the display when you press the
: key.
• To replace the battery
0. Remove the six screws that
hold the back cover in place
and then remove the back
cover.
0- Remove the old battery
® Wipe off the sides of new bat¬
tery with a dry, soft doth. Load
it into the unit with the posi¬
tive © side facing up (so you
can see it):
@ Replace the back cover and
secure it in place with the six
screws,
(§) Press ® to turn power on. Be
sure not to skip this step.
*
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