Bill, I know dropping the $$ for a battery is not fun, but seriously, before the old one craps out & you NEED on so you can ride, depending on how old your battery is, maybe it would be a good idea to pull the battery, get all the cells right on water & see how it acts. Batteries can go from good to total crap without warning. So, since its riding time, maybe you would be smart to go ahead & order one? If the battery you are running is 2 or 3 years old I would sure consider it.
The guy who mentioned "Its only 1 cell you are seeing" is absolutely right. The one behind the cut out can be looking great & another could have the plates exposed.