Garmin GPS 48 Owner's Manual - Page 63

Battery Installation Appendix A The GPS 48 operates on 4 AA alkaline batteries (includ- ed), which are installed in the base of the unit. These batteries provide up to 24 hours of continuous use. Battery Rechargeable NiCad or lithium batteries may also be used. Installation Battery life will vary due to a variety of factors, including temperatue and use of screen bacdklighting. Lithium batter- ies will provide longer life in colder conditions. The GPS 48 also features an internal 10-year lithium battery which retains your data while changing the AA batteries or when stored with nearly depleted AA batteries ! Note: The on-screen battery level indicator is calibrated for alkaline batteries, and will not be accurate when using NiCad or lithium batteries. To install the batteries: 1. Flip up the metal D-ring at the base of the unit, and turn the ring 1/4 turn counterclockwise. Open the comparment door to access the batteries. 2. Install the batteries and close the comparment door. When replacing the GPS 48 batteries, observe the polarity markings engraved in the plastic case. (The indicated polarity represents which end of the battery should be viewable when the compartment door is opened.) 3. Lock the comparment door in the closed position by turning the D-ring 1/4 turn clockwise. 59