Based on the fact they are about 13 years old, should I dump them? There are “eneloop” rechargeable batteries now and they are much better than older ones. I'll go to those if I need to dump the others.
Testing on the dishwasher is acceptable, in the kitchen. Wouldn't recommend it with batteries. If they were mine, I might run an extension cord out to the clay pit in the back yard and try recharging them after running them down. I would have a shovel nearby. Batteries can go boom if you don't treat them right.
Batteries are fragile things, and need constant care, monitoring, and good temps.
I screwed up one winter month when I was gone from here and didn't take care of some big batteries, and they died, badly. About $500 and 2Kwh worth of telecom surplus batteries. Ouch.
I did offset some on redeeming their carcasses at the scrap guy's yard.
Yes, that's about a ton of batteries.
Dump them.
Hope the rotator cuff gets better. My right one has been acting up so bad that I can't scratch the center of my back.
Getting old is bad. The alternative is worse.
/johnny