I need a new remote release for my 7d. I see a bunch that have a LCD and a timer built in, which seems like an interesting add on feature over the simple push button.
However, I have had wireless releases before, and they batteries always seem to be dead every time I reached for it. So I want to avoid anything that requires batteries to run.
My question.... does anyone know if the shutter release function of these types of remotes will function without a battery. I realize the LCD and the timer require a battery. It looks like the canon version works without a battery, but I can't seem to find anything on the 3rd party ones.