Hi y'all My dad is dreaming of a little place in the woods, where he can sit and write with his laptop (my old wincrap thingy, 2.4 GHz Celeron D, 256 MB DDR PC-2300 RAM, 30 GB 4.200 rpm. HDD, 16 MB Intel GMA/852 and a 14" screen). If he got a 12 V truck/car battery, how long could he sit in the woods and write, running nothing but Word. Don't worry about rain or stuff, just tell me how far he could go on it. I know the computer has a maximum voltage consumption of 19.1 V. That's all I know.