Canon BJ-30 - Manual (Page 146)

138 Installing and Using the Battery Pack Chapter 9
3. Close the interface cover.
4. Open the paper support.
❏ This turns on the battery switch so the printer can receive power
from the battery pack.
5. Start your print operations.
When not printing, close the paper support. When the paper support is
open, the battery switch is turned on and the printer is receiving power
from the battery pack.