Polaroid PDC-2000 - Manual (Page 117)

Note: The camera is not operable while the batteries are
removed, even if the power adapter/trickle charger is
connected. Furthermore, you may need to reset the camera’s
date, time, default picture label and automatic shutoff settings
if the batteries are removed from the camera for more than 30
minutes. For these reasons, you may want to purchase
additional “AA” NiCad batteries for use while others are
charging. (See Recommended battery types on page 106.)
5 After the batteries have been charged, reinsert them into the
battery holder. Be sure to observe the battery orientation
label. (Install the two outside batteries first, then install the
two inside batteries.)
Maintenance and troubleshooting 109