http://en.wikipedia.org/wiki/L... http://en.wikipedia.org/wiki/Lithium-ion_batteries http://en.wikipedia.org/wiki/L... http://en.wikipedia.org/wiki/L... http://en.wikipedia.org/wiki/L... http://en.wikipedia.org/wiki/L... energy density of Li-Ion batteries is 160 Wh/kg http://en.wikipedia.org/wiki/L... lithium ion batteries lithium-ion batteries lithium-ion batteries Lithium-ion batteries