Are the batteries from two Dell laptops interchangeable?

Hi. I have a Dell Studio 17" and a Dell Inspiron 15". I am planning to take a trip soon and I only plan to bring one laptop, but I want maximum battery run time, and I was wondering if I could take the battery from the Studio 17" out of the laptop and take the battery with me and just swap it into the Inspiron when it's battery gets low. I know I would have to hibernate the computer or have it plugged in when I switch the batteries. But what I want to know is, will it work? Without harming the laptop or either battery? Thank you.