I know this isn't audio related but I buy these for ever vehicle I own, and since I just picked up a handful of new trucks, I needed a few, and these went on sale today this is the exact model I use, and I have some that are 4 years old and still work perfectly, its the same unit AAA uses {where I used to buy them for $165 each, they have since came down in price}, but this is a pretty good deal the cheapest I ever bought them was $130 shipped, I know there are some on ebay for $120 but them are refurbed {talked to the guy last week}...
Booster PAC ES5000 12V Portable Battery Booster Pack : Amazon.com : Automotive
Anyhow, its a good price on something that is quite useful, as my grandfather used to say, "better safe than sorry"...
