Powered by a rechargeable battery, the XPower Powerpack 300Plus provides up to 300 watts of AC power and can jump-start a car, truck, boat or small RV It can also operate a wide range of 12-volt automotive and marine products. Ideal for power emergencies, XPower Powerpack 300Plus comes with a built-in flourescent emergency light and jump-start cables. The 20 amp-hour battery will power a cordless telephone for up to 40 hours, a laptop computer for six hours, and a portable stereo for 17 hours. The flourescent light that comes with it will run for up to 25 hours on a fully charged battery. Recharge XPower from a standard wall outlet with the included AC charger. 1-year warranty.