Sears has the DieHard Portable Power 750 with 12 Volt Outlet and Light (71486) for $50 - 10% off in cart = $45
[Exp 5/2 at 1AM PDT] with free in-store pickup or $11 shipping. Add to cart to receive discounted price. Provides emergency power with 750 Peak Amps to jump start a 12V vehicle, or up to 20 hours of DC power for accessories and built-in light. Includes 18" cables and spark resistant clamps.