that seems like a short amount of time, what kind of batteries do you have? i use rechargeable Ni-MH ones, and i have like 4 sets i keep rotating, they last pretty well. also, i hardly ever use the lcd screen on my camera...that drains batteries real fast.
Not using the lcd screen isnt an option, unless I wanna just wing the filming and hope for the best while im filming (or being filmed). The reason I cant/dont want to is because I have a hand-made handle right in the way of my other option, I'd rather be as accurate as possible.