One is a UB1280ZH
SEALED LEAD-ACID BATTERY
1280 12V 8Ah.
Bill, don't count out batteries that have low voltage reading, I would charge them until the current stops drooping, that means the battery has accepted as much charge as it can hold for that cycle. Batteries that have been unused for a while tend to increase in capacity after several cycles.
You have a 8Ah battery, technically it should be able to support a 1A load for 8 hours before it reaches 10.5V under load (and 12V without load). This is a good way to see how much capacity the battery will hold, then you need to decide if the battery has enough capacity for the project you want to use it for.
Think of a battery as a one gallon can, over the years it gets dents and crushed, it still holds liquid but not as much as when it was new.
Also, there is nothing wrong with using a battery that has one cell shorted as long as it will deliver the required current for the project you use it in, it makes a great battery for projects that needs a 9V or 5V supply. Think of it as ultimate reassignment of parts before it go's to the re-cycler.