Phyical Power Off for Sensors?

I am wondering if the way to Physically Power Off both the Motion and Contact Sensors is the same 3 seconds and 3 flashing lights like the instructions have for turning it on using the little metal key pressing the reset button. Is this the case? The instructions do not say anything about how to physically turn them off. So I just want to make sure as I want to store a few that I was playing around with until I actual use them but do not want to use up their batteries. If it is the case, it would be nice to add that into the actual instructions. Like maybe add it to the little paper slip Quick Start Guide that comes with them.

Take the battery out as there is NO on off switch.
The key that fits into the pinhole in the instruction is to turn on pairing mode to set the sensor up.