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What cell voltage are nickel cadmium batteries?

I have some Nickel Cadmium Batteries, each one has 2 cells . They are aproximately 15″ x 6″ x 8″, I guess they weigh about 10 kg each. It says the brand name is NIFE. I’m on a 12v solar power system for my home and need to know how many of these Nickel Cadmium batteries I need to replace my dying leadacid battery bank. At the moment a multimeter puts them between 2.4v and 2.8v per cell, but I don’t know their present state of charge

I hope you mean 2.4 volts per battery, which is 2 cells. This puts the cell voltage at 1.2 volts, about right for Ni-Cd.

2,4 volts per cell doesn’t make sense.

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