So, I've opened my old supplies, took a few batteries out, NiCD in fact, approx. 2years old and put them in the charger. The charger doesn't semm to notice anything bad, eveythings OK.
In an hour or so, I've noticed a sound. Strange... like like raindrops against a window, only very, very silent. I tried to locate it. It was the batteries. I imidietaly took them out of the charger, and they were still making the sound.
Now: Question: Is it normal for NiCD batteries to be noisy during charging? Or are these batteries DEAD and I should leave them that way?