Power draw of a P-6860fx

I'm not good at reading the specs on the AC adapter, but if I'm correct it looks like the input (draw?) is 2 amps and I've heard that it's a 90W adapter. It outputs 6.8 amps to the laptop (at least that's my understanding). The reason I wonder is we're going on a road trip and I bought an inverter to power the laptop, so my son can play games and DVD's to keep himself busy. The inverter is a 250W device, that will power up to 2.3 amp. I'm assuming that should work fine, but I wanted to see if anyone could verify this. I blew out one of the cigarette lighter ports in my car a couple of years ago with a different inverter (supposedly a 300W) and a different laptop. This inverter has power protection that is supposed to blow a fuse before doing damage to anything else, so I'm thinking this should be safe. Anyone have any ideas on whether this should work out for us? Thanks in advance...

 

How long is this road trip?

I have used mine in my car for a few hours with a 120watt converter. but it wasnt bery powerful so the battery idd slowly discharge (would have lasted about 13-14 hours)

The down side is that i think i could have started a fire with the converter (cheaply made)

I believe thatpower directly from a charging port/cig lighter of a car is poorly conditioned as well so you might suffer battery capacity loss due to the nature of the power (though that might be a complete myth i havent the knowledge to say)

But assuming you have a good converter (with a fuse) and arent going to be powered on for 12+ hours i dont think it will be that big of a deal and should work fine.

 

I used a Kill-A-Watt meter on my P6831FX and it draws 40W idle at windows, 45 playing music and peaks at about 80W playing a 3D game with music going and is online wirelessly.

 

From a standard 110v outlet it will draw 220 watts and is rated to provide 120 watts to the laptop. Like Vashar said, in practice you will use far less than 120 watts. Even with conversion losses, the 250W inverter should do ok.

If you undervolt your laptop, you'll draw significantly less power while stressing it. Most people have had good success with undervolting since the stock voltages are usually set much higher than is required to ensure product stability across the line. There is a guide in this forum that will explain how to do it, it's easy.