Actually, the cost of most newer technology batteries has been on a steady climb the last few years ...
And I agree with above - have mostly AC/Delco units again now - I'm done with Opti/Oopsy-Fails
After five (5) failures in just over 4 years in cars, trucks and boats I've chucked them all (turned in for $5 cores) and gone to AGM's or even back to standard construction for some trucks.
The last 'Oopsy' in the lake ski boat hardly made it through a season, well actually it didn't ... failed once and was exchanged for full credit ... ten failed again right after replacement warranty expired. Installed a marine AGM and it's not on it's third season with not a hint of problem/failure - even when the kids left the key-on last summer for a week after they left
It was flat, but took a full charge overnight and has been fine.
Just can't justify the cost/lifecycle/failure of them - I can buy 2~3 other batteries for the cost of a single 'Oopsy' - and can keep a spare or two in the shop on maintainers year round
I think they had a great product years ago, along with the
factor that made them worth the extra cost - but now they are poor to terrible at best ...
And since they're buried in the back of that boat ... behind a cover ... and then the seat ... I sure don't miss any
factor of having one there