Gravimetric and Volumetric Energy Densities of Various Metal-air Battery Systems (image) Forschungszentrum Juelich Share Print E-Mail Caption Gravimetric and volumetric energy densities of various metal-air battery systems in comparison with Li-ion batteries and conventional gasoline. Credit Forschungszentrum Jülich / H. Weinrich Usage Restrictions Please give credit. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.