Thanks Penguin,
It amazes me that I might have to buy one of these if I want to leave my car at the airport for a week or two. The unit you linked is 1500 peak amps. this one: Amazon.com: Clore Automotive ES2500KE 12 Volt Portable Battery Booster Pack: Automotive is 900. Being mechanignorant, as I am, have to ask: is the 1500 needed or would 900 suffice to get an X5 started?

I was amazed at some of the statements coming out of the mouths of Sales associates during the sales process. Now, to hear service departments making statements like "user error for opening the doors too often with a 100 mile commute"?...

Edit, Penguin, do you know how long those units will hold a charge (weeks, months...?). Thanks again.