Garmin eTrex 20 Owner's Manual - Page 7
Battery Information, WARNING, Installing AA Batteries - turn by turn
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Battery Information ‹ warning The temperature rating for the device (-4°F to 158°F, or -20 to 70°C) may exceed the usable range of some batteries. Alkaline batteries can rupture at high temperatures. Getting Started 2. Insert the batteries, observing polarity. notice Alkaline batteries lose a significant amount of their capacity as temperature decreases. Therefore, use lithium batteries when operating the device in below-freezing conditions. Installing AA Batteries The device operates on two AA batteries. You can use alkaline, NiMH, or lithium batteries. Use NiMH or lithium batteries for best results. 1. Turn the D-ring counter-clockwise, and pull up to remove the cover. 3. Replace the battery cover, and turn the D-ring clockwise. 4. Hold . 5. Select Setup > System > Battery Type. 6. Select Alkaline, Lithium, or Rechargeable NiMH. eTrex Owner's Manual 7