I am considering putting in a small 135cca lithium battery in my car for a starting battery.
Fleabay has a $104 , 135cca motorcycle battery that may work.
Not sure if 135cca would suffice, being it would be a reliable near full 135cca it 'may' work.
My car calls for a big 220cca , probably to insure people can slightly abuse the battery and still start at the end of the day. My cars ac is non functioning, so its needs are factored out.
http://www.starcycle-usa.com/catalog/BatterSpecs.pdf