OK, Hollywood Electrics provided a battery, I pulled off the faux gas tank, and indeed the bad cell is 24 (guity) or 1 (cell logger). The bike has been sitting a long time so I am re-charging it back to top. Individual battery from Hollywood Electrics appears to be already charged on my single cell charger. So when the big charger is done topping off the batteries I will take off the front top case of batteries, lift up the back top case of batteries to make room, then slide out the small lower case of batteries where battery 24/1 resides, to replace it.
The bad battery actually seems to be taking some charge at this point in time, better than it was doing after the last ride. However, it is also already jacking up above the rest of the batteries, at about 3.5 volts as opposed to the average 3.35 volts....