Curious as to why AXPW.ob is seeing a +5% jump today, I did some digging. Turns out, BMW announced their new 5 series with 62.8mpg, utilizing stop-start.
I am left to strongly assume a car using stop-start from BMW will have the PbC technology in its lead-acid battery. Considering their joint presentation in Nov 2010, and Axion's progress getting the PbC line up and running. (No hard evidence just yet, until we see some figure coming from Axion, but I think its fairly realistic speculation.)