Yes, 7.2 v. But it last longer since the canon ones are 4500 mAh while equivalent from other brands are 5500 mAh. Power 2000 last even longer, since there are 6000 mAh !!!

The Power 2000 batteries are the equivalent of Canon's BP-945 batteries. As Jean-Philippe notes, they are significantly longer-lasting. I've used them for years. Lenmar also makes an excellent BP substitute.

The GL1 gives a very good picture. In fact I prefer its color quality over the GL2. True, you can adjust more color into the GL2:

http://homepage.mac.com/bhardy3/PhotoAlbum31.html

but the unique warm colors of the GL1 cannot be duplicated in the GL2.

You may not have as many controls as the GL2 but you made a great choice. The resolution is a little better on the GL2 but you would be hard pressed to tell the difference by a casual observation.

http://homepage.mac.com/bhardy3/PhotoAlbum28.html

I think you will be very happy with your purchase. I know I was and I had two of them before upgrading to the GL2.