-> TW> A Local has them advertized at about $115. That is about Three
-> TW> times the price I would pay for a car battery.

-> Three times?  What are you driving these days?

I have two Subaru's and ht Chev S10 Pickup.

-> Much of what's out there,  and what's been out there since about the mid-1980s
-> has tended toward requiring somewhat higher CCA in a somewhat lower-profile
-> package.
                                           
 Being in Sunny Southern California I don't pay any atention to CCA
ratings.       I buy for Lowest Price.  :-)  :-)  But even at $40 for a
battery that is close to 1/3 rd of the Price of the Highly Hyped Gell
Cell batteries.
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