CASIO SF-4990
User Guide

PART 1

Getting Started

Low Battery Message
A message appears on the display to warn you when the batteries power drops below a certain level. Should battery power drop too low, data in memory may be corrupted or lost. Whenever a low battery power message appears on the display, be sure to stop operation of the SF Unit and replace batteries as soon as possible. Important! � Whenever the message �WEAK BATTERIES! CONSULT YOUR USER�S GUIDE IMMEDIATELY!� appears, be sure to replace all batteries. � The low battery message may appear even when battery power is not low if you turn on the EL backlight under cold conditions. We recommend that you do not use the EL backlight under cold conditions. � Actual battery life is affected by a variety of factors including battery manufacturer, the amount of time batteries spend in storage before you use them, and the temperature of the location where you are using the SF unit.

Battery Precautions
Incorrectly using batteries can cause them to burst or leak, possibly damaging the interior of the SF Unit. Note the following precautions. � Be sure that the positive (+) side of each battery is facing up (so you can see it).

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Never mix batteries of different types.

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Never mix old batteries and new ones.

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