Garrett Metal Detectors GTAx 550 Owner's Manual page 42

5. Press out the old batteries from the holders.
6. Install the new batteries. Carefully observe polarity
of the batteries and place them in the holders.
7. Replace the holders in the detector. It is important
that you make certain that the rivet on each battery
holder is visible in the center of the battery case. If
the holders are replaced incorrectly, it will be difficult
to install the battery covers.
8. Press the battery covers down firmly.
Remember when the battery pack is removed for
more than four minutes, you will lose settings you
have made in audio, depth and disc. All settings will
automatically return to those set at the factory.
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