I'm awaiting delivery of my new Fiesta Titanium X with keyless entry, and having never used a vehicle with this technology before I'm quite curious as to how it works and how secure it really is. So here's a couple of questions for you if you don't mind. 1) How close to the car does the fob need to be before the doors will open? (There's an unlock button on the door handle). I'm curious as to whether parking the car on the drive would leave it vulnerable to thieves with the fob only a few feet away inside the house. 2) How long should the battery in the fob last?... and is it wise to carry a spare? With a traditional key, you can at least unlock the car doors even if key's battery is flat (although you won't be able to start the engine if the key is coded to the car). It seams like a potential problem in future cold winter months when the battery in the fob might be on the way out.