Canon BJC-80 - Manual (Page 70)

Recharge the battery pack only when it is fully discharged. Charging it
before it is fully discharged reduces the battery capacity.
Remove the battery pack when you are storing the printer.
Always turn off the printer before unplugging the AC adapter or closing the paper support—this
allows the print head to return to the home position and prevents it from drying out.
Examining the Battery Case
Examine the battery case before you attempt to install it.
From the Front
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