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Interesting article. However, I don't see this happening. Even if they have designed a lead acid battery that can handle higher C rates without horrible peukert effects, and they can get around the weight issue by eliminating cooling and bms systems (which I have doubts about, its still going to need both in a demanding application, lead acid have traditionally never really been stressed nearly as much as they are saying), they still have horrible cycle life compared to nimh and lithium... Lead batteries also suffer from sulfation problems anytime they aren't near fully charged. In a hybrid you don't want to run around with a full battery pack so you have room for regenerative braking. The article doesn't address either of these two issues.
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