Casio JF-100MS User Guide - Page 16

Power Supply The type of battery you should use depends on the model number of your calculator. fx-115MS The TWO WAY POWER system actually has two power supplies: a solar cell and a G13 Type (LR44) button battery. 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 continue 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 5 key. u To replace the battery 1 Remove the five screws that Screw hold the back cover in place and then remove the back cover. Screw 2 Remove the old battery. 3 Wipe off the sides of new battery with a dry, soft cloth. Load it into the unit with the positive k side facing up (so you can see it). 4 Replace the back cover and secure it in place with the five screws. 5 Press 5 to turn power on. Be sure not to skip this step. E-14