Making a car difficult to steal

Bad Sport said
No, just put it where you can reach it, but yet out of sight.

http://www.ebay.com/itm/Waterproof-...28?pt=US_Tracking_Devices&hash=item2a1b5f1990

You just have to remember to charge the battery every few days.

I didn't realize this thread was so old. That ebay link from 10-02-2012 still works.