Refilling and storage issues are being worked on by using ethanol instead of H2 (look up Direct Alcohol Fuel Cell). It is considered better than methanol due to

Refilling and storage issues are being worked on by using ethanol instead of H2 (look up Direct Alcohol Fuel Cell). It is considered better than methanol due to a much lower toxicity and higher energy density but the tech is just not there yet. This is considered to be the future for medium size batteries (small vehicles, hand machinery etc.). Beyond that, what is wrong with green crude-derived fuels (gasoline, diesel, jet fuel) as a medium of energy storage? It is being produced right now in small quantities after refining green crude made from algae grown into water/sunlight (carbon neutral form). Some advantages: * doesn't compete with arable land like corn ethanol * can be grown in salt water * no oxygen atoms to oxide your tank/engine * much less sulfurs or combustion by-products than fossil-crude refined fuels * can be refined using existing infrastructure * can be distributed using existing infrastructure * can be used in existing vehicles and machinery * recycling combustion engines is much less energy-intensive than batteries