My husband and I recently purchased "The Spot." It has a battery inside it, but it tracks by satellite. You pay an annual fee for the satellite. It is smaller than a package of cigarettes and mounts with screws or adhesives. We have not mounted it as of yet, but I moved it to the other side of the table and it sent an e-mail to my phone alerting me that it had moved along with the location of it. It cost $100.O0 with a $50 rebate. Activation of the satellite for a year is $100. I had read in the local paper where a woman recovered her scooter because she had a tracker on it.