Extend Laptop Battery Time with an Inverter for your Vehicle

If you use your laptop a lot, in or near your car, you should have one of these.
They are power inverters and take a cigarette lighter socket and turn it into a 110 wall outlet, with varying amounts of wattage, the ones listed below are the low cost ones.

They won't run a refrigerator, but for a small unit, like a laptop, or phone charger they are perfect. This way while you are driving (well, not YOU driving), you can be recharging, or using And charging your laptop or whatever.

They sell these at Sears, Home Depot, Target, all over.
They have more expensive units that have increasing wattages, but for running small devices, they are perfect.

I like these because they have a cord, so they dont clutter the outlet area. you can also cut the cord and wire it into the vehicles electrical system to make it permanent. It also has good wattage 220W.
Wired

Compact
This one is compact and sits at the outlet level, a great choice to throw into the laptop bag so its always with ya.