Preserving Accutron Life: Battery In or Out

So I've got myself a bit of an Accutron collection. It's come together quickly over the last few months. Nothing too expensive, but all watches I enjoy. Does an accutron 'last' longer with the battery in or battery out? I have enough Accutron's that's they won't all be worn regularly. I hate to have them all crap out or need servicing in a couple of years. Thanks for any advice.

Jason