From the section on power consumption: 2. The power consumption of the graphics card under load was equal to the difference between the system with the card running CPUBurn and ATITool simultaneously, and the baseline system running CPUBurn only. If I use the numbers in the tables on the same page I...

Suitable deep-discharge gel-based lead-acid batteries are usually sold as 'Solar' batteries. e.g. the Sonnenschein Dryfit solar. The 60 Ah version weighs 19 kg. If that's too heavy you might have to resort to NiMh batteries, which weigh around 60 Wh/kg or Li-ion batteries at over 100 Wh/kg, but that...

The AMD Geode NX1750 processor is Socket A based. Its maximum power is 14 W if you can set Vcore to 1.25 V.