Canon A420 - Manual (Page 92)

90
The LCD monitor also displays the Date/Time menu the very
first time you turn on the camera. This is normal, and you don't
need to replace the date battery.
It is best to power the camera with AC Adapter Kit ACK800 (sold
separately) when you are using it for long periods of time or
connecting it to a computer.
Using an AC Adapter Kit (Sold Separately)
Turn the camera power off before connecting or
disconnecting the compact power adapter.
1
Connect the power cord
to the compact power
adapter first and then
plug the other end into
the power outlet.
2
Open the terminal cover
and attach the cord to
the DC IN terminal.
z Please unplug the adapter from
the power outlet when you have
finished using the camera.
z Please do not attempt to use any AC adapter other than
AC Adapter Kit ACK800 with your camera. Use of a
different adapter may result in damage to the camera or to
the adapter kit.
z Do not connect the AC Adapter Kit ACK800 to any other
devices. It could cause smoke and fire, or damage the
compact power adapter.