14.7 CUSTOMER SUPPORTShould you require additional assistance, please call our Customer SupportDepartment. Customers in the continental United States may use our toll freenumber: 1-800-800-1020. Customers outside the continental United Statesmay call 1-913-599-1515.14.6 MAINTENANCEThe GPS 100 is constructed of high quality material and does not require usermaintenance. Please refer any repairs to an authorized GARMIN servicecenter. (The unit contains no user servicable parts, do not attempt repairsyourself.)Never allow gasoline or solvents to come into contact with your unit. Damageto the case may occur which is not covered by your warranty.The waypoints, routes, custom settings, and other data stored in the GPS100 are maintained by an internal battery. (These data will not be lost evenif you remove the AA or rechargeable battery pack for separate storage.) Theinternal memory battery should typically last three to five years. If the GPS100 detects a low memory battery, you will be informed with the message“MEMORY BATTERY LOW”. You should return your unit to an authorizedGARMIN service center as soon as possible for service. Failure to do so mayresult in loss of data each time you turn your unit off (indicated by themessage “STORED DATA LOST”).Your GPS 100 contains a highly accurate crystal oscillator which may driftafter many years of operation. If the unit detects excessive oscillator drift,you will be informed with the message “OSC NEEDS ADJUSTMENT”. Youshould return your unit to an authorized GARMIN service center as soon aspossible. Failure to do so may result in degraded acquisition performance.14-10