I'm convinced my OEM battery was defective from new at this point.
It died on me at the beginning of Feb this year, only four months old, after failing more than once. Modeling the charge states, it was crappy even when it was working well.
I replaced it with the Antigravity battery from Todd. The charging system now works exactly to spec on the meter, and starting performance is far better.
It turned out, however, that over the Summer (from late June on) I put very few miles on Racer, and then I was gone for seven weeks traveling in other parts of the world while it just sat. I probably should have disconnected the battery. When I got back in October, the Antigravity battery was down to about 8.2V, static. Luckily, I'd invested in the fancy Optimate lithium battery charger, so I pulled the battery and set it up on the charger. I let the recovery charge, standard charge, and then test cycle run its course over about fifteen hours and all indicators came up green. The battery went back into Racer and it's been working fine ever since.
It's pretty obvious to me that a) modern motorcycles with all these new electronics in them put a much greater load on the charging system and battery, b) the OEM batteries are undersized with very little reserve performance to handle it all, c) the lithium battery at the same size and lower weight does a better job, and d) some sensible maintenance is still required.
I'm not an everyday rider like I once was, I actually ride my bicycle more than I drive my car or ride my motorcycle nowadays. (I try to keep putting 50-100 miles a week on the bike as a minimum to keep it in good nick, and the same for my car. I put about 120 miles a week on my bicycle...
) That's where I am these days.
G