Powered by a rechareable battery, XPower Powerpack 300 Plus 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 300 Plus comes with a built-in flourescent emergency light and jumpstart 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 full charged battery. Recharge XPower from a standard wall outlet with the included AC charger.