This technology allows soldiers to transport a lot of power with very
little weight and volume. No need to carry spare batteries. The fuel
cells run on liquid methanol, a fuel with superior energy density. Ten
liters of methanol, weighing a mere 8.4 kg, generate 11.1 kilowatt
hours. Two 28 liter fuel cartridges can power a 25 watt device for more
than 100 days without any user intervention. It can work in temperatures
ranging from -25 To + 55 degrees.