The only way to tell for certain is to charge them up and put a load tester on them.
If they are bad, I would save a couple for trades on a new battery to reduce the risk of a core charge. They won't care what you give them, as long as it has a positive and a negative terminal and is larger than Duracell.
In fact, I'd take one of your batteries right now to save the core charge as I buy a battery for my battery-less Montgomery Wards 14.
Ben W. in Va