I had a photo session where I had to take action shots of snowboarders. The temperature was -15 degree Celcius, and I had taken about 150 photos with one battery. That day I was taking 3 pictures per jump. Also, I didn't use my Image Stabilizer lens. The IS lens do eat up a lot of energy.

When taking wedding photos, I use 1full battery and half of second battery for the whole event. I normally take about 250 - 300 photos, moslty using my IS lens.

Hope this helps.

JVphotography

Quote Originally Posted by racingpinarello
For those who use the Canon 10D, how long do the battery last? If and when I buy the 10D I want to make sure that I have enough batteries for a day of shooting on the street/assignment.

It looks like the grip can hold two batteries, is that enough? I heard that they last forever.

Loren

thanks for all of those who answered my questions about digital file conversion, digital camera backup, etc. I've been asking a lot of questions and I appreciate the assistance.