Re: @Itzman Oh look, another magic battery technology
"3 kw/kilo Li air battery would equal a gallon of fuel. Li air has the potential for 10 kw/kilo"
Can you clarify your units - you are using power when you should be using energy.
Petrol is ~32MJ/L or ~ 44MJ/kg - it's a rapidly moving target but a Li-ion is ~~ 1MJ/kg . Now I take your point about efficiency but given the very variable sources of electricity , transmission distance & losses, charging/discharging efficiency and motor losses I'd guess we are a long way from 90% overall at the moment. On the other hand it's good to see such a potential improvement.
Just seen a report of potentially 'cheap' magnesium/iron batteries for non-traction uses :-