Appendix A Page 237Appendix AMaintaining Your HandheldThis chapter provides information on the following:n Caring for your handheldn About the AAA batteriesn Automatic recharging of the transmittern Proper use of the antennan Resetting your handheldCaring for your handheldYour handheld is designed to be rugged and reliable and to provideyears of trouble-free service. Please observe the following general tipswhen using your handheld:n Take care not to scratch the screen of your handheld. Keep thescreen clean. When working with your handheld, use the suppliedstylus or plastic-tipped pens intended for use with a touch-sensitive screen. Never use an actual pen or pencil or other sharpobject on the surface of the handheld screen.n Your handheld is not waterproof and should not be exposed torain or moisture. Under extreme conditions, water may enter thecircuitry through the front panel buttons. In general, treat yourhandheld as you would a pocket calculator or other smallelectronic instrument.n The touch-sensitive screen of your handheld contains a glasselement. Take care not to drop your handheld or subject it to anystrong impact. Do not carry your handheld in your back pocket: ifyou sit on it, the glass may break.n Protect your handheld from temperature extremes. Do not leaveyour handheld on the dashboard of a car on a hot day, and keep itaway from heaters and other heat sources.n Do not store or use your handheld in any location that is extremelydusty, damp, or wet.n Use a soft, damp cloth to clean your handheld. If the surface of thehandheld screen becomes soiled, clean it with a soft clothmoistened with a diluted window-cleaning solution.