> Panasonic would NOT pay additional money in licensing to make less money by having their batteries last longer. > Large companies like this make sure the bat

> Panasonic would NOT pay additional money in licensing to make less money by having their batteries last longer. > Large companies like this make sure the batteries they use aren't interchangable or standardized Li-Ion cells are made in a variety of standard sizes: http://en.wikipedia.org/wiki/Battery_sizes#Round_lithium-ion_rechargeable http://en.wikipedia.org/wiki/Battery_sizes#Round_lithium-ion.... I happen to own a couple of individual 18650 cells, and Panasonic and a number of other companies supply these cells to battery pack manufacturers wholesale. See also: http://www.panasonic.com/industrial/batteries-oem/oem/lithium-ion.aspx http://www.panasonic.com/industrial/batteries-oem/oem/lithiu... Battery packs for consumer electronics are another issue.