Thinking to save some weight through swapping my heavy standard battery to a lightweight race style one, looking for suggestions and advice.

Using the car for circuit and hillclimbs and driving to and from events (up to 200km away). Not a dedicated track car but, also, not a daily driver.

Anyway, I was looking at SSB lithium, mainly because they state "SSB PowerSport Lithium Batteries are also one of the only Lithium Ion Batteries that can be charged using normal 12V car battery chargers / alternators." which sounds useful.
http://www.superstart.com.au/tabid/1...rtLithium.aspx

Interested to know what others are running and why... thanks!