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A comment on How Tesla-Toyota Project Led to Culture Clash by Opposites. Parent comment

Re:How Tesla-Toyota Project Led to Culture Clash by Opposites by seanflyon on Tuesday August 12, 2014 @05:50PM (#8170403)
Obviously batteries will not surpass 100% efficiency and are already reasonably close to that so yes, batteries are nearing a hard limit on efficiency. Energy density on the other hand is no where near its theoretical limits.
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Re:How Tesla-Toyota Project Led to Culture Clash by Opposites by stcredzero on Saturday August 16, 2014 @10:04PM (#8188315)
> Obviously batteries will not surpass 100% efficiency and are already reasonably close to that so yes, batteries are nearing a hard limit on efficiency. Energy density on the other hand

Energy density is what I meant. I found some graphs to look at. You are probably right about there being lots more room for improving energy density.

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