We bought one of these from Autozone recently. Not bad. Jumpstart your car anywhere without needing another car. Around $60 USD after taxes. We'll be taking it with us on road trips for sure.
There are other models available.If you're not comfortable opening the car hood and hooking up to the car battery, there are models that allow you to jumpstart through the cigarette lighter. Not sure how well that works but I know they do make them. I'm sure your local automotive shop can help you pick out the right one for you.
In any case, read the manual or have the shop show you how it works--especially if you have a unusual car battery.
There are other models available.
In any case, read the manual or have the shop show you how it works--especially if you have a unusual car battery.