The battery in a key fob I have has to be replaced every 2 years. It's not like the old remotes where it only transmits when you press the button. Because of the stupid push button start, it HAS to transmit all of the time and kill your battery on a schedule. This isn't some luxury car either, it's a base model mazda.

Car companies don't get enough hate for taking away the glorious key barrel. It's even more convenient, because it gives you a place to put your key while you're driving. I hate having it in my pocket and since there's no ignition now, I have to put it somewhere in the car instead of sticking it in a place I don't use.