a must have

if you're using your Powershot in the studio, indoor macro or time-lapse sessions, astro-photography...you'll find this AC adapter indispensable. This is a must have.

Canon ACK-DCA20 AC Kit

The unit works perfectly and is easy to use. I highly recommend this unit particularly for anyone who transfers images directly from their PowerShot G7 or Digital Rebel XT/STi camera to a computer since it avoids having to drain the camera battery during this time

Essential for constant "on" operation

I am involved in amateur astrophotography these days and now I don't have to worry about my batteries dying when I'm in the middle of a long session of 3-4 hours. This adapter works perfectly with my Canon Digital Rebel XT (350D) and is the "one to buy" for this purpose. It comes with two fake batteries (one for the PowerShot G7 I suppose and one for the Rebel XT/XTi) and a little mini jack plugs into that after it is inserted into the camera. As always, Canon quality is apparent. This product is a great value.