www.allaboutbatteries.com

Wikipedia: Orders of magnitude (energy)

Anchor text: Battery Energy Tables

Wikipedia: Energy density

Anchor text: this page

Wikipedia: Wikipedia:Reference desk/Archives/Science/2010 April 28

Wikipedia: Wikipedia:Reference desk/Archives/Science/2012 April 8

Anchor text: Battery energy storage in various battery types

Wikipedia: Energy density Extended Reference Table

Wikipedia: Wikipedia:Reference desk/Archives/Science/2013 August 27