Canon BJ-10sx User Manual page 35

When the battery pack is low, you can attach the AC adapter to
continue printing. You can also use the remaining battery power
for limited printing by pressing ON LINE.
You can travel with additional battery packs that are fully
charged.
Recharge the battery pack only when the printer indicates a low
battery error. Charging the battery before it is fully discharged
reduces he battery capacity. (See Chapter 9, Installing and Using
Options, for details on the battery pack.)
Avoid leaving the printer in a closed automobile where it may be
exposed to extreme changes in temperature or humidity.
After installing an ink cartridge, always leave it in the printer.