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A comment on Kia rejects Li-ion for Pb-carbon in hybrid car. Parent comment

Re:Kia rejects Li-ion for Pb-carbon in hybrid car by coryrc on Tuesday May 20, 2014 @04:47PM (#7775082)
The numbers you are comparing are not even close to the same energy capacity.

LiFePO4 can be bought for ~$.33/Wh

A flooded golf cart battery is the very cheapest per Wh, and they are about $.10/Wh assuming 100% capacity (which you can actually only use 50-80% of, boosting cost to $.13-.22/Wh).

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Re:Kia rejects Li-ion for Pb-carbon in hybrid car by mikeash on Tuesday May 20, 2014 @05:00PM (#7775148)
The whole point of a "mild hybrid" such as what's discussed in the article is that you can get some of the benefits of a hybrid with a much smaller battery and motor.

You can spend a bunch of money on a full hybrid system and get large increases in fuel economy, or you can spend a small amount of money on a "mild hybrid" system and get a small increase in fuel economy. What he's saying is that, for the small amount of money involved, a 15% gain is pretty decent.

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