Portable Power Unit. $159.95. This is some power puppy, let me tell you. Not only does it store enough juice to jump-start up to 20 cars, but it comes with plug sockets for indoor use, air compressor, lantern, radio and alarm clock (in case you nod off while inflating the airbed, we suppose).
When the safety-sealed battery is fully charged (simply plug it into AC overnight), the power source provides 400 watts of AC power, enough to run a TV for four hours or a home security system for 4 0 hours. The battery holds its charge for 90 days of non-use, so you can leave one in the home and one in the car for long periods.