Installing Batteries

The GPSMAP® 66s/st handheld device operates using two AA batteries (not included). Use NiMH or lithium batteries for best results.

NOTE: The GPSMAP 66sr is not compatible with AA batteries.
  1. Turn the D-ring counter-clockwise, and pull up to remove the cover.
  2. Insert two AA batteries, observing polarity.

    Battery installation showing polarity
  3. Replace the battery cover, and turn the D-ring clockwise.
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