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I have encountered a few references to Ni-Cr batteries, such as a Charger for NiMH and Ni-Cr batteries. I think it may be a synonym for NiCd. If you can shed any light on this, it would be most welcome. If it is just a synonym for NiCd, how did it come about?
I also found several alibaba listings for "NiCr" batteries. They appeared to just be NiCd, but I am not sure.
There is no such battery called Ni-Cr. It is likely just a typo.
As other commenters have mentioned the 'r' and 'd' are close on the keyboard.
The only common nickel based battery chemistries are Ni-Cd (or Nickel Cadmium) or Ni-MH (Nickel Metal Hydride). They operate similarly with Ni-MH being the more recent with better capacity and not using toxic Cadmium. They both have terminal voltages of ~1,2v which is similar to zinc-carbon (manganese alkaline) primary batteries. They are relatively safe and do not usually suffer from explosive or thermal failure in the way that Li-Ion batteries do.
They both suffer from high self-discharge rates of many % per month and have been supplanted in modern equipment by Lithium based batteries (e.g. Li-Ion).
The term "Ni-Cr batteries" can be found only in conjunction with "Nitecore" producer of chargers and batteries. I would guess that this is a marketing ploy to promote the Nitecore brand, "Ni-core" batteries.
