is a 90 watt power inverter good enought

[renovation]

or safe enough to keep a laptop going for maybe 5-6 hours at a time !
spec. on inverter .
Technical
Output voltage-120V AC, 60 Hz

Output power- 90 watts

Input voltage- 10.8V DC-15.8V DC

Input current- 10A max

Overload- Surge protected

The 90 Watt Targus Mobile Power Inverter is the perfect AC and DC power source for anyone who travels in an RV, car, airplane, or boat. The unique design of the power inverter allows you to lay the product flat on its side or inside a cup holder. A single AC outlet powers and/or charges a notebook, portable DVD player, game console and other AC accessories while the cigarette lighter socket provides DC power. "Plug-in" power eliminates the need for spare batteries and the built-in surge protection allows for safe usage during car start-up and shutdown. The Power Inverter also features a 36-inch, “no tangle” cord. So now, it's easy to power up wherever you go!link to product i speaking of

[blade]

I have a 240w but have yet to try it. You can get a better deal at http://www.geeks.com with something like this 140w:
http://www.geeks.com/details.asp?invtid ... =SCH&srm=0

At times they have similar for around $10.

It may be ok, but may run the cpu at a slower speed to cut back on power if it isn't enough. The same way running off a battery, I'd think anyway.

[Busby]

My dad picked up a 400W invertor from Costco and my mom and me both had our laptops plugged in and running and the maximum power output was just barely over 100W if that. My laptop alone did 50-60W (the inverter had a display which showed the output).

[renovation]

im getting this for use on the plane - i hade a 135 wat unit i use to recharge drill batterys and so on for the work truck . but didn't have the plug in for a plane seat