Nick,
This may
lift your spirits a little.
The batteries in a Prius car carry about 40 WH/Kg
Lithium Technology Corporation is currently producing the 60 Ah HE-602050 Lithium Ion cell battery, with an energy density of 150 WH/Kg.
Moli Energy (Canada) Limited is currently producing the model ICR-18650J Lithium Ion cell battery, with an energy density of 188 Wh/kg
It appears that the Zinc-Air battery is (or will be) 300 Wh/kg
With hundreds of companies spending billions of dollars on batteries, fuel cells and Ultracapacitors, the future should be very en
lightening.
Dave