Vivitar Vivicam 3350B - Manual (Page 9)

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2.0 Installing the Batteries -
Step 1: Open the battery door by lifting
the tab on the door.
Step 2: Insert two AAA batteries with the
polarity as shown:
Step 3: Close the battery cover.
Warning: Do not open the battery door when the camera is powered ON.
This will cause all images in memory to be lost immediately. If you open the
battery door when the camera is OFF (when changing the batteries) you
must close the door within thirty (30) seconds or your images will be erased
from memory.