Canon BJ-10sx - Manual (Page 90)

Using the Battery Pack
With a fully charged battery pack, you may be able to print up to 40
pages without the use of AC power. The actual printing time depends
on the complexity of the data you are printing.
To charge a battery pack, follow these steps:
1. Make sure the printer is turned off.
2. Turn on the battery switch.
3. Press and hold the ON LINE button, and press the POWER
button. When the printer beeps, release the POWER button.
When it beeps again, release the ON LINE button. The POWER
light blinks.
The POWER light continues to blink while the battery is charging
(about 10 hours). When the battery is fully charged, the printer
automatically turns off.
To print using battery power, follow these steps:
1. Make sure the AC adapter is disconnected. (When the AC adapter
is connected, the printer will always use AC power.)