Recently got my new TPMS sensors (Thanks Mike!) and I'm getting ready to have Cooper CS4's installed on my new (to me) Pilot wheels. Do the batteries have to be activated (like removing a little plastic cover to thing) or do they activate once the wheels begin to turn? Never thought about it before and it seems like a silly question, but I want to make sure the tire shop doesn't mess anything up. Thanks a bunch! Will post pics once it's all done.