Canon PowerShot G10 - Manual (Page 260)

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It is best to power the camera with AC Adapter Kit ACK-DC50 (sold
separately) when you are using it for long periods of time or connecting
it to a computer.
Using the AC Adapter (Sold Separately)
Turn the camera power off before connecting or disconnecting
the AC adapter.
1
Connect the power
cord to the compact
power adapter first
and then plug the
other end into the
power outlet.
2
Connect the DC plug of
the compact power
adapter cable to the DC
Coupler terminal.
3
Open the memory card/
battery cover, then insert the
DC Coupler until it is locked.
Compact Power
Adapter
CA-PS700
DC Coupler
DR-50
Battery lock