The new XS Power D4700, D4800, and D4900 are direct fit batteries for many of the most popular European model vehicles including Mercedes, Jaguar, Land Rover, Porsche, SAAB, Rolls Royce, Volvo, and more. These batteries are designed for use under the hoods as starting batteries or in the back as secondary batteries. The D4700 and D4800 are good for up to 2000 watts as the starting battery and 3000 watts as a secondary battery. The D4900 will power up to 3000 watts as the starting battery and 4000 watts as a secondary battery.