Interesting to hear the several comments here on how fast their Optimas discharge, even when just sitting disconnected. I've never experienced anything like that. Newer Optima or old.
I've had 3 Blue Tops sitting on my garage floor for over three years and, with no re-charge, each one started the car right up when finally installed.
Friend has a 10 year old Red Top he just put in his Bronco after the EFI conversion and, after a quick top-off charge, has been cranking away faithfully for over a month now, while we test the new electrical system and mess around with things.
Another friend had the same experience with a pair of Yellow Tops. They sat in his Bronco (disconnected but in the Bronco still) for 2 1/2 years while the Bronco sat. No charging, no maintenance, not even opening up the hood in that time. When we hooked up the main to start the engine, we thought we'd have to at least charge it first. Nope. Had just enough to crank and start. Granted, it was down slightly and cranking semi-slowly, so any more than a minimal start time might have taken it below the threshold, but they were still high enough to work.
I know all batteries discharge while sitting, so theoretically they should not have lasted that long, but so far I'm 7 for 7 with Optimas not only holding their charge, but a couple of them have even come back from the dead too, with just a little finesse.
Yellows were purchased about 3 years go, so should be the "new" versions. Blues about 5. Reds back in the stone age. So I'm considering myself lucky, and crossing my fingers. I'll buy again until I run afoul of the problems that many seem to be facing.
Paul