Garmin eTrex 30 Owner's Manual

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eTrex Owner’s Manual 41Device InformationSpecificationsWaterresistanceRugged plastic,waterproof to IEC 60529IPX7Battery type 2 AA batteries,(alkaline, NiMH, lithium,or precharged NiMH)Battery Life Up to 25 hoursOperatingtemperaturerangeFrom -4°F to 158°F(-20°C to 70°C)About the Batteries‹ WARNINGThe temperature rating for the device(page 41) may exceed the usable rangeof some batteries. Alkaline batteriescan rupture at high temperatures.Do not use a sharp object to removebatteries.‹ CAUTIONContact your local waste disposaldepartment to properly recycle thebatteries.noticeAlkaline batteries lose a significantamount of their capacity as temperaturedecreases. Therefore, use lithiumbatteries when operating the device inbelow-freezing conditions.Maximizing Battery LifeYou can do various things to increasethe battery life.• Leave the backlight off when notneeded.• Lower the backlight brightness(page 40).• Decrease the backlight timeout(page 40).