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Installing a NiMH Battery Pack

The GPSMAP® 66s/st device operates using a NiMH battery pack (optional) or two AA batteries (Installing Batteries).

NOTE: The GPSMAP 66sr is not compatible with the NiMH battery pack.
  1. Turn the D-ring counter-clockwise, and pull up to remove the cover.
  2. Locate the battery pack Callout number 1.

    Battery pack installation with a callout
  3. Insert the battery pack, observing polarity.
  4. Gently press the battery pack into place.
  5. Replace the battery cover, and turn the D-ring clockwise.
GUID-C8E8E9D8-9FB4-41B8-B0BC-716C62EB54AB v6
February 2024
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