New AC Delco Professional AGM, shipped by Amazon ($162), 630 CCA, the factory original was 600, it was manufactured in Germany 6 months ago Nov 2017 ( see small vertical -P117R- ). Arrived in good shape in 72 hrs ,with a voltage of 12.4. It fit well in the Volt 2014, and so far working well. By the way I could not find the famous EVLN AC DELCO made specifically for the Volt. Has anyone used this type of battery?. Is a 47, but for some reason the Amazon computer says "this Item will not fit your Chevy Volt" ...Good thing Amazon sometimes is wrong !.