Will this car adapter power this Laptop?

I'm looking to buy a number of car power adapters to be used with some Dell laptops.

http://www.cdw.com/shop/products/default.aspx?EDC=1382005

^ This is the item I am currently looking at.

Will it be able to power a Dell Lattitude E6500?

Looking at the power supply of the laptop, it states that it is a 90W-AC Adapter. The car adapter states that it is a 60W DC - AC Power Inverter.

Will this work? Do I need an DC-AC Power Inverter that is 90W or higher? I am nothing close to an electrician, please help me out.

Thank you.

If your laptop is always in low-power mode then the 60W inverter may be enough for it. If you want to be certain that you don't burn the inverter out then you should get at least a 126 (90*1.4) watt inverter.

If you run a 90 watt laptop on a 60 watt power supply you risk overdrawing the power supply (early death for the charger) and also some chargers may run the laptop, but the battery won't charge. Targus and Kensington usually note that while their 60 watt chargers may spin up a laptop, they won't charge the battery for example.