Polaroid PDC 3000 - Manual (Page 30)

Setting up 30
4 Open the connector cover and connect the power
adapter/trickle charger to the camera and to AC power.
07.CDR
Important: Do not operate the camera until the batteries have
charged for about 6 hours. After this 6-hour period, you can
use the camera while the batteries continue to charge.
Note: The camera is not operable without the batteries, even
if the power adapter/trickle charger is connected.